Business description of Pentair-plc

GENERAL

Pentair, Inc. is a focused diversified industrial manufacturing company comprised of two operating segments: Water and Technical Products. Our Water Group is a global leader in providing innovative products and systems used worldwide in the movement, storage, treatment and enjoyment of water. Our Technical Products Group is a leader in the global enclosures and thermal management markets, designing and manufacturing standard, modified and custom enclosures that house and protect sensitive electronics and electrical components and protect the people that use them.

Pentair Strategy

Our strategy is to drive sustainable, profitable growth and Return on Invested Capital (“ROIC”) improvements through:

Unless the context otherwise indicates, references herein to “Pentair”, the “Company,” and such words as “we,” “us,” and “our” include Pentair, Inc. and its subsidiaries. Pentair is a Minnesota corporation that was incorporated in 1966.

BUSINESS AND PRODUCTS

Business segment and geographical financial information is contained in ITEM 8, Note 15 of the Notes to Consolidated Financial Statements, included in this Form 10-K.

WATER GROUP

Our Water Group is a global leader in providing innovative products and systems used worldwide in the safe, energy-efficient movement, storage, treatment and enjoyment of water. Our Water Group offers a broad array of products and systems to multiple markets and customers. The core competencies of our Water Group center around flow and filtration. Our Water Group focuses its business portfolio in these primary vertical markets: Residential (55% of Group sales), Municipal and Desalination (14% of Group sales), Commercial (13% of Group sales), Industrial (13% of Group sales) and Agriculture (5% of Group sales). We are organized around the following global business units:

Residential Flow

Our Residential Flow business is a leader in global residential water pumps. We primarily serve residential well water installers and residential end-users, waste water dealers and distributors. We manufacture and sell products ranging from light duty diaphragm pumps to solid handling pumps designed for water and wastewater applications and agricultural spraying, as well as pressure tanks for residential applications. Applications for our broad range of products include pumps for residential wells, water treatment, wastewater solids handling, pressure boosting, engine cooling, fluid delivery, circulation and transfer.

Brand names for the Residential Flow business include STA-RITE^®, Myers^®, Hydromatic^®, Flotec^®, Hypro^®, Berkeley^®, Aermotor^®, Simer^®, Verti-line^®, FoamPro^®, Onga^tm, Nocchi^tm, SHURflo^®, Edwards^tm, JUNG PUMPEN^® and JUNG^tm.

Residential Filtration

Our Residential Filtration business competes in residential and commercial water softening and filtration markets globally. We manufacture and sell control valves, pressure tanks, membranes, carbon products, point of entry and point of use systems and other filter cartridges. Residential Filtration products are used in the manufacture of water softeners; filtration and deionization systems; and commercial and residential water filtration applications.

Brand names for the Residential Filtration business include Fleck^®, Autotrol^®, Structural^tm, Aquamatic^®, Pentek^®, SIATA^tm, WellMate^tm, American Plumber^®, GE^®, OMNIFILTER^® and Fibredyne^tm.

Our Residential Filtration business was formed by a transaction between GE Water & Process Technologies (a unit of General Electric Company) (“GE”) and Pentair.

Pool

Our Pool business manufactures and sells a complete line of commercial and residential pool equipment and accessories including pumps, filters, heaters and heat pumps, lights, automatic controls, automatic pool cleaners, commercial deck equipment, maintenance equipment and pool accessories. Applications for our pool products include commercial and residential pool maintenance, repair and renovation as well as service and construction. Our Pool business predominantly serves the North American market.

Brand names for the Pool business include Pentair Pool Products^®, Pentair Water Pool and Spa^®, STA-RITE^®, Paragon Aquatics^®, Kreepy Krauly^®, Compool^®, WhisperFlo^®, PoolShark^®, Legend^®, Rainbow^tm, FIBERworks^®, IntelliTouch^®, IntelliFlo^®, IntelliChlor^{^®}, Onga^tm and Pentair Piscines^tm.

Engineered Flow

Our Engineered Flow business is a global leader in municipal, commercial and industrial water and fluid handling markets. We primarily serve commercial end-users; waste water dealers and distributors; commercial and industrial operations; and municipal water treatment facilities. We manufacture and sell products ranging from light duty diaphragm pumps to high-flow turbine pumps and solid handling pumps designed for water, wastewater and a variety of industrial applications. Applications for our broad range of products include pumps for municipal wells, water treatment, wastewater solids handling, pressure boosting, engine cooling, fluid delivery, circulation, fire suppression and transfer.

Brand names for the Engineered Flow business include Myers^®, Aurora^®, Hydromatic^®, Fairbanks Morse^tm, Layne/Verti-line^®, FoamPro^®, Edwards^®, Aplex and Delta Environmental.

Filtration Solutions

Our Filtration Solutions business competes in selected commercial and industrial markets for both water and other fluid filtration as well as in desalination and reverse osmosis projects globally. We manufacture and sell filter systems, filter cartridges, pressure vessels and specialty dispensing pumps providing flow solutions for specific end-user market applications including, commercial, foodservice, industrial, marine and aviation. Filtration Solutions products are used in the manufacture of filtration, deionization and desalination systems; industrial and commercial water filtration applications; and filtration and separation technologies for hydrocarbon, medical and hydraulic applications.

Brand names for the Filtration Solutions business include Everpure^®, SHURflo^®, Porous Media^tm and CodeLine^®.

Customers

Our Water Group distributes its products through wholesale distributors, retail distributors, original equipment manufacturers, home centers and home and pool builders. Information regarding significant customers in our

Water Group is contained in ITEM 8, Note 15 of the Notes to Consolidated Financial Statements, included in this Form 10-K.

Seasonality

We experience seasonal demand in a number of markets within our Water Group. End-user demand for pool equipment follows warm weather trends and is at seasonal highs from April to August. The magnitude of the sales increase is partially mitigated by employing some advance sale “early buy” programs (generally including extended payment terms and/or additional discounts). Demand for residential and agricultural water systems is also impacted by weather patterns, particularly by heavy flooding and droughts.

Competition

Our Water Group faces numerous domestic and international competitors, some of which have substantially greater resources directed to the markets in which we compete. Consolidation and globalization are continuing trends in the water industry. Competition in commercial and residential flow technologies markets focuses on brand names, product performance (including energy-efficient offerings), quality and price. While home center and national retailers are important for residential lines of water and wastewater pumps, they are not important for commercial pumps. For municipal pumps, competition focuses on performance to meet required specifications, service and price. Competition in water treatment and filtration components focuses on product performance and design, quality, delivery and price. For pool equipment, competition focuses on brand names, product performance (including energy-efficient offerings), quality and price. We compete by offering a wide variety of innovative and high-quality products, which are competitively priced. We believe our distribution channels and reputation for quality also contribute to our continuing market penetration.

TECHNICAL PRODUCTS GROUP

Our Technical Products Group is a leader in the global enclosures and thermal management markets, designing and manufacturing standard, modified and custom enclosures that house and protect sensitive electronics and electrical components and protect the people that use them. Our Technical Products Group focuses its business portfolio on the following primary vertical markets: Industrial (35% of Group sales), Communications (25% of Group sales), General Electronics (10% of Group sales), Energy (10% of Group sales) and Commercial, Security and Defense, Infrastructure and Medical (these four vertical markets combined represent approximately 20% of Group sales). Products include metallic and composite enclosures, cabinets, cases, subracks, backplanes and associated thermal management systems. Applications served include industrial machinery, data communications, networking, telecommunications, test and measurement, automotive, medical, security, defense and general electronics.

Brand names for the Technical Products Group business include Hoffman^®, Schroff^®, McLean^®, Taunus^tm, Birtcher^®, Calmark^® and Aspen Motion^tm.

Our Technical Products Group distributes its products through electrical and data contractors, electrical and electronic components distributors and original equipment manufacturers. Information regarding significant customers in our Technical Products Group is contained in ITEM 8, Note 15 of the Notes to Consolidated Financial Statements, included in this Form 10-K.

Our Technical Products Group is not significantly affected by seasonal demand fluctuations.

Competition in the technical products markets can be intense, particularly in the Communications market, where product design, prototyping, global supply, price competition and customer service are significant factors. Our Technical Products Group has continued to focus on cost control and improving profitability. Recent sales increases in the Technical Products Group are the result of market recovery following the global recession in 2009. The growth derived from the market recovery was complemented by growth from initiatives

focused on product development, continued channel penetration, growth in targeted market segments, geographic expansion and price increases. Consolidation, globalization and outsourcing are visible trends in the technical products marketplace and typically play to the strengths of a large and globally positioned supplier. We believe our Technical Products Group has the global manufacturing capability and broad product portfolio to support the globalization and outsourcing trends.

INFORMATION REGARDING ALL BUSINESS SEGMENTS

Backlog

Our backlog of orders as of December 31 by segment was:

Water Group

Technical Products Group

Total

The $91.5 million decrease in Water Group backlog was primarily due to reduced backlog related to the Gulf Intracoastal Waterway project and other large municipal projects for the Engineered Flow global business unit at December 31, 2010. The $33.2 million increase in the Technical Products Group backlog reflected growth across our vertical markets served. Due to the relatively short manufacturing cycle and general industry practice for the majority of our businesses, backlog, which typically represents less than 60 days of shipments, is not deemed to be a significant item. A substantial portion of our revenues result from orders received and product sold in the same month. We expect that most of our backlog at December 31, 2010 will be filled in 2011.

Research and development

We conduct research and development activities in our own facilities, which consist primarily of the development of new products, product applications and manufacturing processes. Research and development expenditures during 2010, 2009 and 2008 were $67.2 million, $57.9 million and $62.5 million, respectively.

Environmental

Environmental matters are discussed in ITEM 3, ITEM 7 and in ITEM 8, Note 16 of the Notes to Consolidated Financial Statements, included in this Form 10-K.

Raw materials

The principal materials used in the manufacturing of our products are electric motors, mild steel, stainless steel, electronic components, plastics (resins, fiberglass, epoxies), copper and paint (powder and liquid). In addition to the purchase of raw materials, we purchase some finished goods for distribution through our sales channels.

The materials used in the various manufacturing processes are purchased on the open market and the majority are available through multiple sources and are in adequate supply. We have not experienced any significant work stoppages to date due to shortages of materials. We have certain long-term commitments, principally price commitments, for the purchase of various component parts and raw materials and believe that it is unlikely that any of these agreements would be terminated prematurely. Alternate sources of supply at competitive prices are available for most materials for which long-term commitments exist and we believe that the termination of any of these commitments would not have a material adverse effect on operations.

Certain commodities, such as metals and resin, are subject to market and duty-driven price fluctuations. We manage these fluctuations through several mechanisms, including long-term agreements with price adjustment clauses for significant commodity market movements in certain circumstances. Prices for raw materials, such as metals and resins, may trend higher in the future.

Intellectual property

Patents, non-compete agreements, proprietary technologies, customer relationships, trade marks, trade names and brand names are important to our business. However, we do not regard our business as being materially dependent upon any single patent, non-compete agreement, proprietary technology, customer relationship, trade mark, trade name or brand name.

Patents, patent applications and license agreements will expire or terminate over time by operation of law, in accordance with their terms or otherwise. We do not expect the termination of patents, patent applications or license agreements to have a material adverse effect on our financial position, results of operations or cash flows.

Employees

As of December 31, 2010, we employed approximately 14,300 people worldwide. Total employees in the United States were approximately 6,900, of whom approximately 475 are represented by four different trade unions having collective bargaining agreements. Generally, labor relations have been satisfactory.

Captive Insurance Subsidiary

We insure certain general and product liability, property, workers’ compensation and automobile liability risks through our regulated wholly-owned captive insurance subsidiary, Penwald Insurance Company (“Penwald”). Reserves for policy claims are established based on actuarial projections of ultimate losses. Accruals with respect to liabilities insured by third parties, such as liabilities arising from acquired businesses, pre-Penwald liabilities and those of certain foreign operations are established.

Matters pertaining to Penwald are discussed in ITEM 3 and ITEM 8, Note 1 of the Notes to Consolidated Financial Statements — Insurance Subsidiary, included in this Form 10-K.

Available information

We make available free of charge (other than an investor’s own Internet access charges) through our Internet website (http://www.pentair.com) our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and if applicable, amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 as soon as reasonably practicable after we electronically file such material with or furnish it to, the Securities and Exchange Commission. Reports of beneficial ownership filed by our directors and executive officers pursuant to Section 16(a) of the Securities Exchange Act of 1934 are also available on our website. We are not including the information contained on our website as part of or incorporating it by reference into, this Annual Report on Form 10-K.

You should carefully consider the following risk factors and warnings before making an investment decision. You are cautioned not to place undue reliance on any forward-looking statements. You should also understand that it is not possible to predict or identify all such factors and should not consider the following list to be a complete statement of all potential risks and uncertainties. If any of the risks described below actually occur, our business, financial condition, results of operations or prospects could be materially adversely affected. In that case, the price of our securities could decline and you could lose all or part of your investment. You should also refer to other information set forth in this document.

General economic conditions, including difficult credit and residential construction markets, affect demand for our products.

We compete around the world in various geographic regions and product markets. Among these, the most significant are global industrial markets (for both the Technical Products and Water Groups) and residential markets (for the Water Group). Important factors for our businesses include the overall strength of the economy and our customers’ confidence in the economy; industrial and governmental capital spending; the strength of the residential and commercial real estate markets; unemployment rates; availability of consumer and commercial financing for our customers and end-users; and interest rates. New construction for residential

housing and home improvement activity fell in 2007, 2008 and 2009, which reduced revenue growth in the residential businesses within our Water Group. While we saw some stabilization in 2010, we believe that weakness in this market could negatively impact our revenues and margins in future periods. Further, while we attempt to minimize our exposure to economic or market fluctuations by serving a balanced mix of end markets and geographic regions, we cannot assure you that a significant or sustained downturn in a specific end market or geographic region would not have a material adverse effect on us.

Our inability to sustain organic growth could adversely affect our financial performance.

Over the past five years, our organic growth has been generated in part from expanding international sales, entering new distribution channels, introducing new products and price increases. To grow more rapidly than our end markets, we would have to continue to expand our geographic reach, further diversify our distribution channels, continue to introduce new products and increase sales of existing products to our customer base. Difficult economic and competitive factors materially and adversely impacted our financial performance in 2009. These conditions started to improve in many of our end markets in 2010, but we cannot assure you that these markets will continue to improve nor that we will be able to increase revenues and profitability to match our earlier financial performance. We have chosen to focus our growth initiatives in specific end markets and geographies. We cannot assure you that these growth initiatives will be sufficient to offset revenue declines in other markets.

Our businesses operate in highly competitive markets, so we may be forced to cut prices or to incur additional costs.

Our businesses generally face substantial competition in each of their respective markets. Competition may force us to cut prices or to incur additional costs to remain competitive. We compete on the basis of product design, quality, availability, performance, customer service and price. Present or future competitors may have greater financial, technical or other resources which could put us at a disadvantage in the affected business or businesses. We cannot assure you that these and other factors will not have a material adverse effect on our future results of operations.

Material cost and other inflation have adversely affected and could continue to affect our results of operations.

In the past, we have experienced material cost and other inflation in a number of our businesses. We strive for productivity improvements and implement increases in selling prices to help mitigate cost increases in raw materials (especially metals and resins), energy and other costs such as pension, health care and insurance. We continue to implement our excellence in operations initiatives in order to mitigate the impacts of this inflation and continuously reduce our costs. We cannot assure you, however, that these actions will be successful in managing our costs or increasing our productivity. Continued cost inflation or failure of our initiatives to generate cost savings or improve productivity would likely negatively impact our results of operations.

Seasonality of sales and weather conditions may adversely affect our financial results.

We experience seasonal demand in a number of markets within our Water Group. End-user demand for pool equipment in our primary markets follows warm weather trends and is at seasonal highs from April to August. The magnitude of the sales increase is partially mitigated by employing some advance sale or “early buy” programs (generally including extended payment terms and/or additional discounts). Demand for residential and agricultural water systems is also impacted by weather patterns, particularly by heavy flooding and droughts. We cannot assure you that seasonality and weather conditions will not have a material adverse effect on our results of operations.

Intellectual property challenges may hinder product development and marketing.

Patents, non-compete agreements, proprietary technologies, customer relationships, trade marks, trade names and brand names are important to our business. Intellectual property protection, however, may not preclude

competitors from developing products similar to ours or from challenging our names or products. Over the past few years, we have noticed an increasing tendency for participants in our markets to use conflicts over and challenges to intellectual property as a means to compete. Patent and trademark challenges increase our costs to develop, engineer and market our products.

Our results of operations may be negatively impacted by litigation.

Our businesses expose us to potential litigation, such as product liability claims relating to the design, manufacture and sale of our products. While we currently maintain what we believe to be suitable product liability insurance, we cannot assure you that we will be able to maintain this insurance on acceptable terms or that this insurance will provide adequate protection against potential liabilities. In addition, we self-insure a portion of product liability claims. A series of successful claims against us for significant amounts could materially and adversely affect our product reputation, financial condition, results of operations and cash flows.

We may not be able to expand through acquisitions and acquisitions we complete may adversely affect our financial performance.

We intend to continue to evaluate strategic acquisitions primarily in our current business segments, though we may consider acquisitions outside of these segments as well. Our ability to expand through acquisitions is subject to various risks, including the following:

Acquisitions we may undertake could have a material adverse effect on our operating results, particularly in the fiscal quarters immediately following the acquisitions, while we attempt to integrate operations of the acquired businesses into our operations. Once integrated, acquired operations may not achieve the levels of financial performance originally anticipated.

The availability and cost of capital could have a negative impact on our financial performance.

Our plans to vigorously compete in our chosen markets will require additional capital for future acquisitions, capital expenditures, growth of working capital and continued international and regional expansion. In the past, we have financed growth of our businesses primarily through cash from operations and debt financing. While we refinanced our primary credit agreements in 2007 on what we believe to be favorable terms, future acquisitions or other uses of funds may require us to expand our debt financing resources or to issue equity securities. Our financial results may be adversely affected if new financing is not available on favorable terms or if interest costs under our debt financings are higher than the income generated by acquisitions or other internal growth. In addition, future share issuances could be dilutive to your equity investment if we sell shares into the market or issue additional stock as consideration in any acquisition. We cannot assure you that we will be able to issue equity securities or obtain future debt financing at favorable terms. Without sufficient financing, we will not be able to pursue our targeted growth strategy and our acquisition program, which may limit our revenue growth and future financial performance.

We are exposed to political, economic and other risks that arise from operating a multinational business.

Sales outside of the United States, including export sales from our domestic businesses, accounted for approximately 34% of our net sales in both 2010 and 2009. Further, most of our businesses obtain some

products, components and raw materials from foreign suppliers. Accordingly, our business is subject to the political, economic and other risks that are inherent in operating in numerous countries. These risks include:

Our business success depends in part on our ability to anticipate and effectively manage these and other risks. We cannot assure you that these and other factors will not have a material adverse effect on our international operations or on our business as a whole.

Our international operations are subject to foreign market and currency fluctuation risks.

We expect the percentage of our sales outside of the United States to increase in the future. Over the past few years, the economies of some of the foreign countries in which we do business have had slower growth than the U.S. economy. The European Union currently accounts for the majority of our foreign sales and income, in which our most significant European market is Germany. In addition, we have a significant and growing business in the Asia-Pacific region, but the economic conditions in countries in this region are subject to different growth expectations, market weaknesses and business practices. We cannot predict how changing market conditions in these regions will impact our financial results.

We are also exposed to the risk of fluctuation of foreign currency exchange rates which may affect our financial results as we manufacture and source certain products, components and raw materials throughout the world.

We have significant goodwill and intangible assets and future impairment of our goodwill and intangible assets could have a material negative impact on our financial results.

We test goodwill and indefinite-lived intangible assets for impairment on an annual basis, by comparing the estimated fair value of each of our reporting units to their respective carrying values on their balance sheets. At December 31, 2010 our goodwill and intangible assets were approximately $2,519.6 million and represented approximately 63.4% of our total assets. Long-term declines in projected future cash flows could result in future goodwill and intangible asset impairments. Because of the significance of our goodwill and intangible assets, any future impairment of these assets could have a material adverse effect on our financial results.

We are exposed to potential environmental and other laws, liabilities and litigation.

We are subject to federal, state, local and foreign laws and regulations governing our environmental practices, public and worker health and safety and the indoor and outdoor environment. Compliance with these environmental, health and safety regulations could require us to satisfy environmental liabilities, increase the cost of manufacturing our products or otherwise adversely affect our business, financial condition and results of operations. Any violations of these laws by us could cause us to incur unanticipated liabilities that could

harm our operating results and cause our business to suffer. We are also required to comply with various environmental laws and maintain permits, some of which are subject to discretionary renewal from time to time, for many of our businesses and we could suffer if we are unable to renew existing permits or to obtain any additional permits that we may require.

We have been named as defendants, targets or potentially responsible parties (“PRP”) in a number of environmental clean-ups relating to our current or former business units. We have disposed of a number of businesses in recent years and in certain cases, we have retained responsibility and potential liability for certain environmental obligations. We have received claims for indemnification from certain purchasers. We may be named as a PRP at other sites in the future for existing business units, as well as both divested and acquired businesses.

We cannot ensure you that environmental requirements will not change or become more stringent over time or that our eventual environmental clean-up costs and liabilities will not exceed the amount of our current reserves.

We are exposed to certain regulatory and financial risks related to climate change.

Climate change is receiving ever increasing attention worldwide. Many scientists, legislators and others attribute global warming to increased levels of greenhouse gases, including carbon dioxide, which has led to significant legislative and regulatory efforts to limit greenhouse gas emissions. The U.S. Congress and federal and state regulatory agencies have been considering legislation and regulatory proposals that would regulate and limit greenhouse gas emissions. It is uncertain whether, when and in what form a federal mandatory carbon dioxide emissions reduction program may be adopted. Similarly, certain countries have adopted the Kyoto Protocol and this and other international initiatives under consideration could affect our international operations. These actions could increase costs associated with our operations, including costs for raw materials and transportation. Because it is uncertain what laws will be enacted, we cannot predict the potential impact of such laws on our future consolidated financial condition, results of operations or cash flows.

Provisions of our Restated Articles of Incorporation, Bylaws and Minnesota law could deter takeover attempts.

Anti-takeover provisions in our charter documents, under Minnesota law and in our shareholder rights plan could prevent or delay transactions that our shareholders may favor.

Our Restated Articles of Incorporation and Bylaws include provisions relating to the election, appointment and removal of directors, as well as shareholder notice and shareholder voting requirements which could delay, prevent or make more difficult a merger, tender offer, proxy contest or other change of control. In addition, our common share purchase rights could cause substantial dilution to a person or group that attempts to acquire us, which could deter some acquirers from making takeover proposals or tender offers. Also, the Minnesota Business Corporations Act contains control share acquisition and business combination provisions which could delay, prevent or make more difficult a merger, tender offer, proxy contest or other change of control. Our shareholders might view any such transaction as being in their best interests since the transaction could result in a higher stock price than the current market price for our common stock.

None.

Our principal executive office is in leased premises located in Golden Valley, Minnesota. We carry out our Water Group manufacturing operations at 26 plants located throughout the United States and at 14 plants located in 10 other countries. In addition, our Water Group has 19 distribution facilities and 35 sales offices located in numerous countries throughout the world. We carry out our Technical Products Group manufacturing operations at 6 plants located throughout the United States and 10 plants located in 8 other countries. In

addition, our Technical Products Group has 9 distribution facilities and 26 sales offices located in numerous countries throughout the world.

We believe that our production facilities are suitable for their purpose and are adequate to support our businesses.

We have been made parties to a number of actions filed or have been given notice of potential claims relating to the conduct of our business, including those pertaining to commercial disputes, product liability, environmental, safety and health, patent infringement and employment matters.

While we believe that a material adverse impact on our consolidated financial position, results of operations or cash flows from any such future charges is unlikely, given the inherent uncertainty of litigation, a remote possibility exists that a future adverse ruling or unfavorable development could result in future charges that could have a material adverse impact. We do and will continue to periodically reexamine our estimates of probable liabilities and any associated expenses and receivables and make appropriate adjustments to such estimates based on experience and developments in litigation. As a result, the current estimates of the potential impact on our consolidated financial position, results of operations and cash flows for the proceedings and claims described in “Legal Proceedings” could change in the future.

We have been named as defendants, targets or PRP in a small number of environmental clean-ups, in which our current or former business units have generally been given de minimis status. To date, none of these claims have resulted in clean-up costs, fines, penalties or damages in an amount material to our financial position or results of operations. We have disposed of a number of businesses in the past years and in certain cases, such as the disposition of the Cross Pointe Paper Corporation uncoated paper business in 1995, the disposition of the Federal Cartridge Company ammunition business in 1997, the disposition of Lincoln Industrial in 2001 and the disposition of the Tools Group in 2004, we have retained responsibility and potential liability for certain environmental obligations. We have received claims for indemnification from purchasers of these businesses and have established what we believe to be adequate accruals for potential liabilities arising out of retained responsibilities. We settled some of the claims in prior years; to date our recorded accruals have been adequate.

In addition, there are ongoing environmental issues at a limited number of sites relating to operations no longer carried out at the sites. We have established what we believe to be adequate accruals for remediation costs at these sites. We do not believe that projected response costs will result in a material liability. We have also made claims against third parties for indemnification against potential liabilities for environmental remediations or other obligations. We cannot assure you that we will be successful in obtaining indemnity or reimbursement for such costs.

We may be named as a PRP at other sites in the future, for both divested and acquired businesses. When the outcome of the matter is probable and it is possible to provide reasonable estimates of our liability with respect to environmental sites, provisions have been made in accordance with generally accepted accounting principles in the United States. As of December 31, 2010 and 2009, our undiscounted reserves for such environmental liabilities were approximately $1.3 million and $2.3 million, respectively. We cannot ensure that environmental requirements will not change or become more stringent over time or that our eventual environmental clean-up costs and liabilities will not exceed the amount of our current reserves.

Product liability claims

We are subject to various product liability lawsuits and personal injury claims. A substantial number of these lawsuits and claims are insured and accrued for by Penwald, our captive insurance subsidiary. See discussion in ITEM 1 and ITEM 8, Note 1 of the Notes to Consolidated Financial Statements — Insurance subsidiary. Penwald records a liability for these claims based on actuarial projections of ultimate losses. For all other claims, accruals covering the claims are recorded, on an undiscounted basis, when it is probable that a liability

has been incurred and the amount of the liability can be reasonably estimated based on existing information. The accruals are adjusted periodically as additional information becomes available. In 2004, we disposed of the Tools Group and we retained responsibility for certain product claims. We have not experienced significant unfavorable trends in either the severity or frequency of product liability lawsuits or personal injury claims.

EXECUTIVE OFFICERS OF THE REGISTRANT

Current executive officers of Pentair, their ages, current position and their business experience during at least the past five years are as follows:

Name

Current Position and Business Experience

Randall J. Hogan

Michael V. Schrock

John L. Stauch

Frederick S. Koury

Angela D. Lageson

Michael G. Meyer

Mark C. Borin

Our common stock is listed for trading on the New York Stock Exchange and trades under the symbol “PNR.” As of December 31, 2010, there were 3,735 shareholders of record.

The high, low and closing sales price for our common stock and the dividends declared for each of the quarterly periods for 2010 and 2009 were as follows:

High

Low

Close

Dividends declared

Pentair has paid 140 consecutive quarterly dividends and has increased dividends each year for 34 consecutive years.

Stock Performance Graph

The following information under the caption “Stock Performance Graph” in this ITEM 5 of this Annual Report on Form 10-K is not deemed to be “soliciting material” or to be “filed” with the SEC or subject to Regulation 14A or 14C under the Securities Exchange Act of 1934 or to the liabilities of Section 18 of the Securities Exchange Act of 1934 and will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent we specifically incorporate it by reference into such a filing.

The following graph sets forth the cumulative total shareholder return on our common stock for the last five years, assuming the investment of $100 on December 31, 2005 and the reinvestment of all dividends since that date to December 31, 2010. The graph also contains for comparison purposes the S&P 500 Index and the S&P MidCap 400 Index, assuming the same investment level and reinvestment of dividends.

By virtue of our market capitalization, we are a component of the S&P MidCap 400 Index. On the basis of our size and diversity of businesses, we have not found a readily identifiable peer group. We believe the S&P MidCap 400 Index is an appropriate comparison. We have evaluated other published indices, but have determined that the results are skewed by significantly larger companies included in the indices. We believe such a comparison would not be meaningful.

PENTAIR INC

S&P 500 INDEX

S&P MIDCAP 400 INDEX

Purchases of Equity Securities

The following table provides information with respect to purchases we made of our common stock during the fourth quarter of 2010:

October 3 — October 30, 2010

October 31 — November 27, 2010

November 28 — December 31, 2010

Total

The following table sets forth our selected historical financial data from continuing operations for the five years ended December 31, 2010.

Statement of Operations Data:

Net sales

Operating income

Income from continuing operations attributable to Pentair, Inc.

Per Share Data:

Basic:

EPS from continuing operations attributable to Pentair, Inc.

Weighted average shares

Diluted:

Cash dividends declared per common share

Balance Sheet Data:

Total assets

Total debt

Total shareholders equity

In February and April 2007, we acquired the outstanding shares of capital stock of Jung Pump and all of the capital interests of Porous Media, respectively, as part of our Water Group. In May 2007, we acquired as part of our Technical Products Group the assets of Calmark. In June 2008, we entered into a transaction with GE that was accounted for as an acquisition of an 80.1 percent ownership interest in GE’s global water softener and residential water filtration business in exchange for a 19.9 percent interest in our global water softener and residential water filtration business.

Forward-Looking Statements

This report contains statements that we believe to be “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements give our current expectations or forecasts of future events. Forward-looking statements generally can be identified by the use of forward-looking terminology such as “may,” “will,” “expect,” “intend,” “estimate,” “anticipate,” “believe,” “project,” or “continue,” or similar words or the negative thereof . From time to time, we also may provide oral or written forward-looking statements in other materials we release to the public. Any or all of our forward-looking statements in this report and in any public statements we make could be materially different from actual results. They can be affected by assumptions we might make or by known or unknown risks or uncertainties. Consequently, we cannot guarantee any forward-looking statements. Investors are cautioned not to place undue reliance on any forward-looking statements. Investors should also understand that it is not possible to predict or identify all such factors and should not consider the following list to be a complete statement of all potential risks and uncertainties.

The following factors and those discussed in ITEM 1A, Risk Factors, of this Form 10-K may impact the achievement of forward-looking statements:

The foregoing factors are not exhaustive and new factors may emerge or changes to the foregoing factors may occur that would impact our business. We assume no obligation and disclaim any duty, to update the forward-looking statements in this report.

Overview

We are a focused diversified industrial manufacturing company comprised of two operating segments: Water and Technical Products. Our Water Group is a global leader in providing innovative products and systems used worldwide in the movement, storage, treatment and enjoyment of water. Our Technical Products Group is a leader in the global enclosures and thermal management markets, designing and manufacturing standard, modified and custom enclosures that house and protect sensitive electronics and electrical components and protect the people that use them. In 2010, our Water Group and Technical Products Group accounted for approximately 2/3 and 1/3 of total revenues, respectively.

Our Water Group has progressively become a more important part of our business portfolio with sales increasing from approximately $125 million in 1995 to approximately $2.0 billion in 2010. We believe the water industry is structurally attractive as a result of a growing demand for clean water and the large global market size. Our vision is to be a leading global provider of innovative products and systems used in the movement, storage, treatment and enjoyment of water.

On June 28, 2008, we entered into a transaction with GE that was accounted for as an acquisition of an 80.1 percent ownership interest in GE’s global water softener and residential water filtration business in exchange for a 19.9 percent interest in our global water softener and residential water filtration business. The acquisition was effected through the formation of two new entities, (collectively, “Pentair Residential Filtration” or “PRF”) a U.S. entity and an international entity, into which we and GE contributed certain assets, properties, liabilities and operations representing our respective global water softener and residential water filtration businesses. We are an 80.1 percent owner of the new entities and GE is a 19.9 percent owner.

Our Technical Products Group operates in a large global market with significant potential for growth in industry segments such as data communications, industrial, infrastructure and energy. We believe we have the largest industrial and commercial distribution network in North America for enclosures and the highest brand recognition in the industry in North America.

Key Trends and Uncertainties

Our sales revenue for the full year of 2010 was approximately $3.0 billion, increasing 13% from sales in the prior year. Our Water Group sales increased 10% in the year to approximately $2.0 billion, compared to the same period in 2009. Our Technical Products Group sales increased 17% to approximately $1.0 billion as compared to the same period in 2009.

The following trends and uncertainties affected our financial performance in 2010 and will likely impact our results in the future:

In 2011, our operating objectives include the following:

We may seek to meet our objectives of expanding our geographic reach internationally, expanding our presence in our various channels to market and acquiring technologies and products to broaden our businesses’ capabilities to serve additional markets though acquisitions. We may also consider the divestiture of discrete business units to further focus our businesses on their most attractive markets.

RESULTS OF OPERATIONS

Net Sales

The components of the net sales change were:

Volume

Price

Currency

Net sales

Consolidated net sales

The 12.6 percentage point increase in consolidated net sales in 2010 from 2009 was primarily driven by:

The 19.7 percentage point decrease in consolidated net sales in 2009 from 2008 was primarily the result of:

These decreases were partially offset by:

Sales by segment and year-over-year changes were as follows:

Technical Product Group

Water Group

The 10.5 percentage point increase in Water Group net sales in 2010 from 2009 was primarily driven by:

• increased sales resulting from the Gulf Intracoastal Waterway Project;

• selective increases in selling prices to mitigate inflationary cost increases.

These increases were partially offset by:

The 16.2 percentage point decrease in Water Group sales in 2009 from 2008 was primarily the result of:

These decreases were partially offset by:

Technical Products Group

The 17.1 percentage point increase in Technical Products Group net sales in 2010 from 2009 was primarily driven by:

The 26.3 percentage point decrease in Technical Products Group sales in 2009 from 2008 was primarily the result of:

Gross Profit

Gross Profit

Percentage point change

The 1.5 percentage point increase in gross profit as a percentage of sales in 2010 from 2009 was primarily the result of:

The 1.1 percentage point decrease in gross profit as a percent of sales in 2009 from 2008 was primarily the result of:

Selling, general and administrative (SG&A)

*SG&A

The 1.3 percentage point decrease in SG&A expense as a percentage of sales in 2010 from 2009 was primarily due to:

The 0.1 percentage point increase in SG&A expense as a percent of sales in 2009 from 2008 was primarily the result of:

These increases were offset by:

Research and development (R&D)

R&D

R&D expense as a percentage of sales in 2010 was flat compared to 2009 primarily as a result of:

The 0.3 percentage point increase in R&D expense as a percent of sales in 2009 from 2008 was primarily the result of:

Operating income

Operating income

The 2.4 percentage point increase in Water segment operating income as a percentage of net sales in 2010 as compared to 2009 was primarily the result of:

The 0.5 percentage point decrease in Water Group operating income as a percent of net sales in 2009 from 2008 was primarily the result of:

The 3.4 percentage point increase in Technical Products Group operating income as a percentage of sales in 2010 from 2009 was primarily the result of:

The 2.9 percentage point decrease in Technical Products Group operating income as a percent of net sales in 2009 from 2008 was primarily the result of:

Net interest expense

Net interest expense

The 12.2 percentage point decrease in interest expense from 2010 from 2009 was primarily the result of:

The 30.8 percentage point decrease in interest expense in 2009 from 2008 was primarily the result of:

Gain on sale of interest in subsidiaries

On June 28, 2008, we entered into a transaction with GE that was accounted for as an acquisition of an 80.1 percent ownership interest in GE’s global water softener and residential water filtration business in exchange for a 19.9 percent interest in our global water softener and residential water filtration business. The acquisition was effected through the formation of two new entities, a U.S. entity and an international entity into which we and GE contributed certain assets, properties, liabilities and operations representing our respective global water softener and residential water filtration businesses. We are an 80.1 percent owner of the new entities and GE is a 19.9 percent owner. The acquisition and related sale of our 19.9 percent interest resulted in a gain of $109.6 million representing the difference between the carrying amount and the fair value of the 19.9 percent interest sold.

Loss on early extinguishment of debt

On July 8, 2008, we commenced a cash tender offer for all of our outstanding $250 million aggregate principal of the Notes. Upon expiration of the tender offer on August 4, 2008, we purchased $116.1 million aggregate principal amount of the Notes. As a result of this transaction, we recognized a loss of $4.6 million on early extinguishment of debt in 2008. The loss included the write off of $0.1 million in unamortized deferred financing fees in addition to recognition of $0.6 million in previously unrecognized swap gains and cash paid of $5.1 million related to the tender premium and other costs associated with the purchase.

On March 16, 2009, we announced the redemption of all of our remaining outstanding $133.9 million aggregate principal of Notes. The Notes were redeemed on April 15, 2009 at a redemption price of $1,035.88 per $1,000 of principal outstanding plus accrued interest thereon. As a result of this transaction, we recognized a loss of $4.8 million on early extinguishment of debt in the second quarter of 2009. The loss included the write off of $0.1 million in unamortized deferred financing fees in addition to recognition of $0.3 million in previously unrecognized swap gains and cash paid of $5.0 million related to the redemption and other costs associated with the purchase.

Provision for income taxes

Income from continuing operations before income taxes and noncontrolling interest

Provision for income taxes

Effective tax rate

The 0.3 percentage point decrease in the effective tax rate in 2010 from 2009 was primarily the result of:

The 3.2 percentage point increase in the tax rate in 2009 from 2008 was primarily the result of:

This increase was partially offset by:

We expect our full year effective tax rate in 2011 to be between 32% and 32.5%. We will continue to pursue tax rate reduction opportunities.

LIQUIDITY AND CAPITAL RESOURCES

We generally fund cash requirements for working capital, capital expenditures, equity investments, acquisitions, debt repayments, dividend payments and share repurchases from cash generated from operations, availability under existing committed revolving credit facilities and in certain instances, public and private debt and equity offerings. We have grown our businesses in significant part in the past through acquisitions financed by credit provided under our revolving credit facilities and from time to time, by private or public debt issuance. Our primary revolving credit facilities have generally been adequate for these purposes, although we have negotiated additional credit facilities as needed to allow us to complete acquisitions; these are temporary loans that have in the past been repaid within less than a year.

We are focusing on increasing our cash flow and repaying existing debt, while continuing to fund our research and development, marketing and capital investment initiatives. Our intent is to maintain investment grade ratings and a solid liquidity position.

Our current $800 million multi-currency revolving credit facility (the “Credit Facility”) expires on June 4, 2012. The agent banks under the Credit Facility are J.P. Morgan, Bank of America, Wells Fargo, U.S. Bank and Bank of Tokyo-Mitsubishi. We believe we have ample borrowing capacity for our currently projected operating needs. Our availability under the Credit Facility was $702.5 million at December 31, 2010, which was not limited by any of the credit agreement’s financial covenants as of that date.

We experience seasonal cash flows primarily due to seasonal demand in a number of markets within our Water Group. We generally borrow in the first quarter of our fiscal year for operational purposes, which usage reverses in the second quarter as the seasonality of our businesses peaks. End-user demand for pool and certain pumping equipment follows warm weather trends and is at seasonal highs from April to August. The magnitude of the sales spike is partially mitigated by employing some advance sale “early buy” programs (generally including extended payment terms and/or additional discounts). Demand for residential and agricultural water systems is also impacted by weather patterns, particularly by heavy flooding and droughts.

Operating activities

Cash provided by operating activities was $270.4 million in 2010 or $12.0 million higher than in 2009. The increase in cash provided by operating activities was due primarily to higher income from continuing operations offset by increased working capital necessary to support revenue growth.

Cash provided by operating activities was $258.4 million in 2009 or $54.2 million higher than in 2008. The increase in cash provided by operating activities was due primarily to a reduction in working capital, offset by an accelerated pension contribution of $25 million and lower income from continuing operations.

In December 2008, we sold approximately $44 million of a customer’s account receivable to a third-party financial institution to mitigate accounts receivable concentration risk. Sales of accounts receivable are reflected as a reduction of accounts receivable in our Consolidated Balance Sheets and the proceeds are included in the cash flows from operating activities in our Consolidated Statements of Cash Flows. In 2008 we incurred a loss in the amount of $0.5 million related to the sale of accounts receivable which is included in the line item Other in our Consolidated Statements of Income. We did not undertake a similar sale of customer receivables in 2009 or 2010.

Investing activities

Capital expenditures in 2010, 2009 and 2008 were $59.5 million, $54.1 million and $53.1 million, respectively. We anticipate capital expenditures for fiscal 2011 to be approximately $60 to $65 million, primarily for capacity expansions in our low cost country manufacturing facilities, new product development and general maintenance capital.

On December 15, 2008, we sold our Spa and Bath (“Spa/Bath”) business to Balboa Water Group in a cash transaction for $9.2 million. The results of Spa/Bath have been reported as discontinued operations for all periods presented.

On February 28, 2008, we sold our National Pool Tile (“NPT”) business to Pool Corporation in a cash transaction for $29.8 million. The results of NPT have been reported as discontinued operations for all periods presented.

Cash proceeds from the sale of property and equipment of $0.4 million in 2010 and $1.2 million in 2009 was primarily related to various asset dispositions. Cash proceeds from the sale of property and equipment of $4.7 million in 2008 was primarily related to the sale of a facility in our Water Group.

Financing activities

Net cash used for financing activities was $190.6 in 2010, $209.1 million in 2009 and $217.2 in 2008. The decrease primarily relates to fluctuations in liquidity. Financing activities included draw downs and repayments on our revolving credit facilities to fund our operations in the normal course of business, payments of dividends, cash received/used for stock issued to employees, repurchase of common stock and tax benefits related to stock-based compensation.

The Credit Facility creates an unsecured, committed revolving credit facility of up to $800 million, with multi-currency sub facilities to support investments outside the U.S. Borrowings under the Credit Facility bear interest at the rate of LIBOR plus 0.625%. Interest rates and fees on the Credit Facility vary based on our credit ratings. We believe that internally generated funds and funds available under our Credit Facility will be sufficient to support our normal operations, dividend payments, stock repurchases and debt maturities over the life of the Credit Facility.

We are authorized to sell short-term commercial paper notes to the extent availability exists under the Credit Facility. We use the Credit Facility as back-up liquidity to support 100% of commercial paper outstanding. Our use of commercial paper as a funding vehicle depends upon the relative interest rates for our commercial paper compared to the cost of borrowing under our Credit Facility. As of December 31, 2010 and 2009 we had no outstanding commercial paper.

Our debt agreements contain certain financial covenants, the most restrictive of which is a leverage ratio (total consolidated indebtedness, as defined, over consolidated earnings before interest, taxes, depreciation and amortization (“EBITDA”), as defined) that may not exceed 3.5 to 1.0. We were in compliance with all covenants under our debt agreements as of December 31, 2010.

In addition to the Credit Facility, we have $40.0 million of uncommitted credit facilities, under which we had $4.8 million of borrowings as of December 31, 2010.

Our current credit ratings are as follows:

Rating Agency

Rating

Outlook

Standard & Poor’s

Moody’s

Our long-term debt rating is an investment grade rating. Investment grade is a credit rating of BBB- or higher by Standard & Poor’s or Baa3 or higher by Moody’s.

On March 28, 2010, Standard & Poor’s (“S&P”) affirmed our BBB- rating with a stable outlook. On April 6, 2010, Moody’s affirmed our Baa3 rating and changed our current rating outlook from negative to stable.

A credit rating is a current opinion of the creditworthiness of an obligor with respect to a specific financial obligation, a specific class of financial obligations or a specific financial program. The credit rating takes into consideration the creditworthiness of guarantors, insurers or other forms of credit enhancement on the obligation and takes into account the currency in which the obligation is denominated. The ratings outlook also highlights the potential direction of a short or long-term rating. It focuses on identifiable events and short-term trends that cause ratings to be placed under observation by the respective rating agencies. A change in rating outlook does not mean a rating change is inevitable. Prior changes in our ratings outlook have had no immediate impact on our liquidity exposure or on our cost of debt. We believe the potential impact of a downgrade in our financial outlook is currently not material to our liquidity exposure or cost of debt.

We issue short-term commercial paper notes that are currently not rated by Standard & Poor’s or Moody’s. Even though our short-term commercial paper is unrated, we believe a downgrade in our long-term debt rating could have a negative impact on our ability to continue to issue unrated commercial paper.

We do not expect that a one rating downgrade of our long-term debt by either Standard & Poor’s or Moody’s would substantially affect our ability to access the long-term debt capital markets. However, depending upon market conditions, the amount, timing and pricing of new borrowings could be adversely affected. If both of our long-term debt ratings were downgraded to below BBB-/Baa3, our flexibility to access the term debt capital markets would be reduced.

We expect to continue to have cash requirements to support working capital needs and capital expenditures, to pay interest and service debt and to pay dividends to shareholders annually. We have the ability and sufficient capacity to meet these cash requirements, by using available cash and internally generated funds and to borrow under our committed and uncommitted credit facilities.

We paid dividends in 2010 of $75.5 million, compared with $70.9 million in 2009 and $67.3 million in 2008. We recently announced an increase in our dividend rate for 2011 from $0.76 per share in 2010 to $0.80 per share in 2011, which is the 35th consecutive year in which we have increased our dividend.

In December 2007, the Board of Directors authorized the repurchase of shares of our common stock during 2008 up to a maximum dollar limit of $50 million. As of December 31, 2008, we had purchased 1,549,893 shares for $50 million pursuant to this authorization. This authorization expired on December 31, 2008. No authorization for the repurchase of shares of our common stock was sought from or granted by our Board for 2009. On July 27, 2010 the Board of Directors authorized the repurchase of shares of our common stock up to a maximum dollar limit of $25 million. As of December 31, 2010 we had repurchased 734,603 shares for $25 million pursuant to this plan. In December 2010, the Board of Directors authorized the repurchase of shares of our common stock up to a maximum dollar limit of $25 million. The authorization expires December 2011.

The following summarizes our significant contractual obligations that impact our liquidity:

Long-term debt obligations

Interest obligations on fixed-rate debt , including effects of derivative financial instruments

Operating lease obligations, net of sublease rentals

Pension and post retirement plan contributions

Other long-term liabilities

Total contractual cash
obligations, net

In addition to the summary of significant contractual obligations, we will incur annual interest expense on outstanding variable rate debt. As of December 31, 2010, variable interest rate debt, including the effects of derivative financial instruments, was $102.4 million at a weighted average interest rate of 1.05%.

The estimated annual pension plan contribution amounts are intended to achieve fully funded status of our domestic qualified pension plan in accordance with the Pension Protection Act of 2006.

Pension and post retirement plan contributions are based on an assumed discount rate of 5.9% for all periods and an expected rate of return on plan assets ranging from 6.0% to 8.0%. In December 2010 and 2009 we made accelerated contributions of $25 million to our defined benefit pension plan.

The total gross liability for uncertain tax positions at December 31, 2010 is estimated to be approximately $24.3 million. We record penalties and interest related to unrecognized tax benefits in Provision for income taxes and Interest expense, respectively, which is consistent with our past practices. As of December 31, 2010, we had recorded approximately $0.8 million for the possible payment of penalties and $4.8 million related to the possible payment of interest.

Other financial measures

In addition to measuring our cash flow generation or usage based upon operating, investing and financing classifications included in the Consolidated Statements of Cash Flows, we also measure our free cash flow. We have a long-term goal to consistently generate free cash flow that equals or exceeds 100% conversion of net income from continuing operations. Free cash flow is a non-Generally Accepted Accounting Principles financial measure that we use to assess our cash flow performance. We believe free cash flow is an important measure of operating performance because they provide us and our investors a measurement of cash generated from operations that is available to pay dividends, make acquisitions, repay debt and repurchase shares. In addition, free cash flow is used as a criterion to measure and pay compensation-based incentives. Our measure of free cash flow may not be comparable to similarly titled measures reported by other companies. The following table is a reconciliation of free cash flow:

Net cash provided by (used for) continuing operations

Capital expenditures

Proceeds from sale of property and equipment

Free cash flow

Off-balance sheet arrangements

At December 31, 2010, we had no off-balance sheet financing arrangements.

COMMITMENTS AND CONTINGENCIES

We have been named as defendants, targets or PRP in a small number of environmental clean-ups, in which our current or former business units have generally been given de minimis status. To date, none of these claims have resulted in clean-up costs, fines, penalties or damages in an amount material to our financial position or results of operations. We have disposed of a number of businesses in recent years and in certain cases, such as the disposition of the Cross Pointe Paper Corporation uncoated paper business in 1995, the disposition of the Federal Cartridge Company ammunition business in 1997, the disposition of Lincoln Industrial in 2001 and the disposition of the Tools Group in 2004, we have retained responsibility and potential liability for certain environmental obligations. We have received claims for indemnification from purchasers of these businesses and have established what we believe to be adequate accruals for potential liabilities arising out of retained responsibilities. We settled some of the claims in prior years; to date our recorded accruals have been adequate.

We may be named as a PRP at other sites in the future, for both divested and acquired businesses. When the outcome of the matter is probable and it is possible to provide reasonable estimates of our liability with respect to environmental sites, provisions have been made in accordance with generally accepted accounting principles in the United States (“GAAP”). As of December 31, 2010 and 2009, our undiscounted reserves for such environmental liabilities were approximately $1.3 million and $2.3 million, respectively. We cannot ensure that environmental requirements will not change or become more stringent over time or that our eventual environmental clean-up costs and liabilities will not exceed the amount of our current reserves.

Stand-by letters of credit and bonds

In the ordinary course of business, we are required to commit to bonds that require payments to our customers for any non-performance. The outstanding face value of the bonds fluctuates with the value of our projects in process and in our backlog. In addition, we issue financial stand-by letters of credit primarily to secure our performance to third parties under self-insurance programs and certain legal matters. As of December 31, 2010 and 2009, the outstanding value of these instruments totaled $116.5 million and $51.2 million, respectively.

NEW ACCOUNTING STANDARDS

See ITEM 8, Note 1 of the Notes to Consolidated Financial Statements for information pertaining to recently adopted accounting standards or accounting standards to be adopted in the future.

CRITICAL ACCOUNTING POLICIES

We have adopted various accounting policies to prepare the consolidated financial statements in accordance with accounting principles generally accepted in the United States. Our significant accounting policies are more fully described in ITEM 8, Note 1 of the Notes to Consolidated Financial Statements. Certain of our accounting policies require the application of significant judgment by management in selecting the appropriate assumptions for calculating financial estimates. By their nature, these judgments are subject to an inherent degree of uncertainty. These judgments are based on our historical experience, terms of existing contracts, our observance of trends in the industry and information available from other outside sources, as appropriate. We consider an accounting estimate to be critical if:

Our critical accounting estimates include the following:

Impairment of Goodwill and Indefinite-Lived Intangibles

Goodwill

Goodwill represents the excess of the cost of acquired businesses over the fair value of identifiable tangible net assets and identifiable intangible assets purchased.

Goodwill is tested at least annually for impairment and is tested for impairment more frequently if events or changes in circumstances indicate that the asset might be impaired. The impairment test is performed using a two-step process. In the first step, the fair value of each reporting unit is compared with the carrying amount of the reporting unit, including goodwill. If the estimated fair value is less than the carrying amount of the reporting unit, an indication that goodwill impairment exists and a second step must be completed in order to determine the amount of the goodwill impairment, if any, that should be recorded. In the second step, an impairment loss is recognized for any excess of the carrying amount of the reporting unit’s goodwill over the implied fair value of that goodwill. The implied fair value of goodwill is determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation.

The fair value of each reporting unit is determined using a discounted cash flow analysis and market approach. Projecting discounted future cash flows requires us to make significant estimates regarding future revenues and expenses, projected capital expenditures, changes in working capital and the appropriate discount rate. Use of the market approach consists of comparisons to comparable publicly-traded companies that are similar in size and industry. Actual results may differ from those used in our valuations.

In developing our discounted cash flow analysis, assumptions about future revenues and expenses, capital expenditures and changes in working capital are based on our annual operating plan and long-term business plan for each of our reporting units. These plans take into consideration numerous factors including historical experience, anticipated future economic conditions, changes in raw material prices and growth expectations for the industries and end markets we participate in. These assumptions are determined over a five year long-term planning period. The five year growth rates for revenues and operating profits vary for each reporting unit

being evaluated. Revenues and operating profit beyond 2017 are projected to grow at a 3% perpetual growth rate for all reporting units.

Discount rate assumptions for each reporting unit take into consideration our assessment of risks inherent in the future cash flows of the respective reporting unit and our weighted-average cost of capital. We utilized a discount rate ranging from 13% to 15% in determining the discounted cash flows in our fair value analysis.

In estimating fair value using the market approach, we identify a group of comparable publicly-traded companies for each operating segment that are similar in terms of size and product offering. These groups of comparable companies are used to develop multiples based on total market-based invested capital as a multiple of EBITDA. We determine our estimated values by applying these comparable EBITDA multiples to the operating results of our reporting units. The ultimate fair value of each reporting unit is determined considering the results of both valuation methods.

We completed step one of our annual goodwill impairment evaluation during the fourth quarter with each reporting unit’s fair value exceeding its carrying value. Accordingly, step two of the impairment analysis was not required.

In connection with our annual impairment test, we determined that the fair value of one of our reporting units did not exceed its carrying value by a significant amount. Goodwill for this reporting unit was $436.6 million at December 31, 2010. If cash flow projections decreased by 2.7% or if the discount rate increased by 50 basis points (the discount rate used in the impairment analysis was 13.5%), this reporting unit would have failed the step one test and a step two analysis would have been required.

Indefinite-Lived Intangibles

Our primary identifiable intangible assets include trade marks and trade names, patents, non-compete agreements, proprietary technology and customer relationships. Identifiable intangibles with finite lives are amortized and those identifiable intangibles with indefinite lives are not amortized. Identifiable intangible assets that are subject to amortization are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Identifiable intangible assets not subject to amortization are tested for impairment annually or more frequently if events warrant. During the fourth quarter of 2010 and 2009, we completed our annual impairment test for those identifiable assets not subject to amortization. There were no impairment charges recorded in 2010. We recorded impairment charges of $11.3 million in 2009. These charges were recorded in Selling, general and administrative in our Consolidated Statements of Income.

The impairment test consists of a comparison of the fair value of the trade name with its carrying value. Fair value is measured using the relief-from-royalty method. This method assumes the trade name has value to the extent that the owner is relieved of the obligation to pay royalties for the benefits received from them. This method requires us to estimate the future revenue for the related brands, the appropriate royalty rate and the weighted average cost of capital. The impairment charge recorded in 2009 was the result of significant declines in sales volume.

At December 31, 2010 our goodwill and intangible assets were approximately $2,519.6 million and represented approximately 63.4% of our total assets. If we experience further declines in sales and operating profit or do not meet our operating forecasts, we may be subject to future impairments. Additionally, changes in assumptions regarding the future performance of our businesses, increases in the discount rate used to determine the discounted cash flows of our businesses or significant declines in our stock price or the market as a whole could result in additional impairment indicators. Because of the significance of our goodwill and intangible assets, any future impairment of these assets could have a material adverse effect on our financial results.

Impairment of Long-lived Assets

value of the asset or asset group from the expected future pre-tax cash flows (undiscounted and without interest charges) of the related operations. If these cash flows are less than the carrying value of such asset, an impairment loss is recognized for the difference between estimated fair value and carrying value. Impairment losses on long-lived assets held for sale are determined in a similar manner, except that fair values are reduced for the cost to dispose of the assets. The measurement of impairment requires us to estimate future cash flows and the fair value of long-lived assets.

Pension

We sponsor domestic and foreign defined-benefit pension and other post-retirement plans. The amounts recognized in our consolidated financial statements related to our defined-benefit pension and other post-retirement plans are determined from actuarial valuations. Inherent in these valuations are assumptions including expected return on plan assets, discount rates, rate of increase in future compensation levels and health care cost trend rates. These assumptions are updated annually and are disclosed in ITEM 8, Note 12 to the Notes to Consolidated Financial Statements. Changes to these assumptions will affect pension expense, pension contributions and the funded status of our pension plans.

We recognize the overfunded or underfunded status of our defined benefit and retiree medical plans as an asset or liability in our Consolidated Balance Sheets, with changes in the funded status recognized through comprehensive income in the year in which they occur.

Discount rate

The discount rate reflects the current rate at which the pension liabilities could be effectively settled at the end of the year based on our December 31 measurement date. The discount rate was determined by matching our expected benefit payments to payments from a stream of AA or higher bonds available in the marketplace, adjusted to eliminate the effects of call provisions. This produced a discount rate for our U.S. plans of 5.90% in 2010, 6.00% in 2009 and 6.50% in 2008. The discount rates on our foreign plans ranged from 0.75% to 5.40% in 2010, 2.00% to 6.00% in 2009 and 2.00% to 6.25% in 2008. There are no other known or anticipated changes in our discount rate assumption that will impact our pension expense in 2011.

Expected rate of return

Our expected rate of return on plan assets was 8.5% for 2010, 2009 and 2008. The expected rate of return is designed to be a long-term assumption that may be subject to considerable year-to-year variance from actual returns. In developing the expected long-term rate of return, we considered our historical returns, with consideration given to forecasted economic conditions, our asset allocations, input from external consultants and broader longer-term market indices.

We base our determination of pension expense or income on a market-related valuation of assets which reduces year-to-year volatility. This market-related valuation recognizes investment gains or losses over a five-year period from the year in which they occur. Investment gains or losses for this purpose are the difference between the expected return calculated using the market-related value of assets and the actual return based on the market-related value of assets. Since the market-related value of assets recognizes gains or losses over a five-year-period, the future value of assets will be impacted as previously deferred gains or losses are recorded.

See ITEM 8, Note 12 of the Notes to Consolidated Financial Statements for further information regarding pension plans.

Market risk is the potential economic loss that may result from adverse changes in the fair value of financial instruments. We are exposed to various market risks, including changes in interest rates and foreign currency rates. We use derivative financial instruments to manage or reduce the impact of changes in interest rates. Counterparties to all derivative contracts are major financial institutions. All instruments are entered into for other than trading purposes. The major accounting policies and utilization of these instruments is described more fully in ITEM 8, Note 1 of the Notes to Consolidated Financial Statements.

Failure of one or more of our swap counterparties would result in the loss of any benefit to us of the swap agreement. In this case, we would continue to be obligated to pay the variable interest payments per the underlying debt agreements which are at variable interest rates of 3 month LIBOR plus .50% for $105 million of debt and 3 month LIBOR plus .60% for $100 million of debt. Additionally, failure of one or all of our swap counterparties would not eliminate our obligation to continue to make payments under our existing swap agreements if we continue to be in a net pay position.

Interest rate risk

Our debt portfolio, excluding impact of swap agreements, as of December 31, 2010, was comprised of debt predominantly denominated in U.S. dollars. This debt portfolio is comprised of 56% fixed-rate debt and 44% variable-rate debt, not considering the effects of our interest rate swaps. Taking into account the variable to fixed-rate swap agreements we entered into with an effective date of April 2006 and August 2007, our debt portfolio is comprised of 85% fixed-rate debt and 15% variable-rate debt. Changes in interest rates have different impacts on the fixed and variable-rate portions of our debt portfolio. A change in interest rates on the fixed portion of the debt portfolio impacts the fair value but has no impact on interest incurred or cash flows. A change in interest rates on the variable portion of the debt portfolio impacts the interest incurred and cash flows but does not impact the net financial instrument position.

Based on the fixed-rate debt included in our debt portfolio, as of December 31, 2010, a 100 basis point increase or decrease in interest rates would result in a $20.0 million increase or decrease in fair value.

Based on the variable-rate debt included in our debt portfolio, including the interest rate swap agreements, as of December 31, 2010, a 100 basis point increase or decrease in interest rates would result in a $1.0 million increase or decrease in interest incurred.

Foreign currency risk

We conduct business in various locations throughout the world and are subject to market risk due to changes in the value of foreign currencies in relation to our reporting currency, the U.S. dollar. We generally do not use derivative financial instruments to manage these risks. The functional currencies of our foreign operating locations are the local currency in the country of domicile. We manage these operating activities at the local level and revenues, costs, assets and liabilities are generally denominated in local currencies, thereby mitigating the risk associated with changes in foreign exchange. However, our results of operations and assets and liabilities are reported in U.S. dollars and thus will fluctuate with changes in exchange rates between such local currencies and the U.S. dollar. From time to time, we may enter in to short duration foreign currency contracts to hedge foreign currency risk on intercompany transactions.

MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Management of Pentair, Inc. and its subsidiaries (the “Company”) is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rules 13a-15(f) and 15d-15(f) of the Securities Exchange Act of 1934. The Company’s internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. The Company’s internal control over financial reporting includes those policies and procedures that (1) pertain to maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the Company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of the financial statements in accordance with generally accepted accounting principles and that receipts and expenditures of the Company are being made only in accordance with authorizations of management and directors of the Company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the Company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of the effectiveness of internal control over financial reporting to future periods are subject to the risk that the controls may become inadequate because of changes in conditions or that the degree of compliance with the policies or procedures may deteriorate.

Management assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2010. In making this assessment, management used the criteria for effective internal control over financial reporting described in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this assessment, management believes that, as of December 31, 2010, the Company’s internal control over financial reporting was effective based on those criteria.

Our independent registered public accounting firm, Deloitte & Touche LLP, has issued an attestation report on the Company’s internal control over financial reporting as of year ended December 31, 2010. That attestation report is set forth immediately following this management report.

Chairman and Chief Executive Officer

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of

Pentair, Inc.

We have audited the internal control over financial reporting of Pentair, Inc. and subsidiaries (the “Company”) as of December 31, 2010, based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed by, or under the supervision of, the company’s principal executive and principal financial officers, or persons performing similar functions and effected by the company’s board of directors, management and other personnel to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of the inherent limitations of internal control over financial reporting, including the possibility of collusion or improper management override of controls, material misstatements due to error or fraud may not be prevented or detected on a timely basis. Also, projections of any evaluation of the effectiveness of the internal control over financial reporting to future periods are subject to the risk that the controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2010, based on the criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated financial statements and financial statement schedule listed in the Index at Item 15 as of and for the year ended December 31, 2010 of the Company and our report dated February 22, 2011 expressed an unqualified opinion on those consolidated financial statements and financial statement schedule.

Minneapolis, Minnesota

February 22, 2011

We have audited the accompanying consolidated balance sheets of Pentair, Inc. and subsidiaries (the “Company”) as of December 31, 2010 and 2009 and the related consolidated statements of income, changes in shareholders’ equity and cash flows for each of the three years in the period ended December 31, 2010. Our audits also included the financial statement schedule listed in the Index at Item 15. These financial statements and financial statement schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on the financial statements and financial statement schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such consolidated financial statements present fairly, in all material respects, the financial position of the Company and subsidiaries at December 31, 2010 and 2009 and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2010, in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, such financial statement schedule, when considered in relation to the basic consolidated financial statements taken as a whole, present fairly, in all material respects, the information set forth therein.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the Company’s internal control over financial reporting as of December 31, 2010, based on the criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 22, 2011 expressed an unqualified opinion on the Company’s internal control over financial reporting.

Pentair, Inc. and Subsidiaries

Consolidated Statements of Income

Cost of goods sold

Gross profit

Selling, general and administrative

Research and development

Legal settlement

Other (income) expense:

Gain on sale of interest in subsidiaries

Equity (income) losses of unconsolidated subsidiaries

Loss on early extinguishment of debt

Interest income

Interest expense

Other

Income from continuing operations

Loss from discontinued operations, net of tax

Loss on disposal of discontinued operations, net of tax

Net income before noncontrolling interest

Noncontrolling interest

Net income attributable to Pentair, Inc.

Net income from continuing operations attributable to Pentair, Inc.

Earnings per common share attributable to Pentair, Inc.

Basic

Continuing operations

Discontinued operations

Basic earnings per common share

Diluted

Diluted earnings per common share

Weighted average common shares outstanding

Basic

Diluted

See accompanying notes to consolidated financial statements.

Pentair, Inc. and Subsidiaries

Consolidated Balance Sheets

ASSETS

Current assets

Cash and cash equivalents

Accounts and notes receivable, net of allowances of $36,343 and $27,081, respectively

Inventories

Deferred tax assets

Prepaid expenses and other current assets

Total current assets

Property, plant and equipment, net

Other assets

Goodwill

Intangibles, net

Other

Total other assets

Total assets

LIABILITIES AND SHAREHOLDERS’ EQUITY

Current liabilities

Short-term borrowings

Current maturities of long-term debt

Accounts payable

Employee compensation and benefits

Current pension and post-retirement benefits

Accrued product claims and warranties

Income taxes

Accrued rebates and sales incentives

Other current liabilities

Total current liabilities

Other liabilities

Long-term debt

Pension and other retirement compensation

Post-retirement medical and other benefits

Long-term income taxes payable

Deferred tax liabilities

Other non-current liabilities

Total liabilities

Commitments and contingencies

Shareholders’ equity

Common shares par value $0.16 2/3; 98,409,192 and 98,655,506 shares issued and

outstanding, respectively

Additional paid-in capital

Retained earnings

Accumulated other comprehensive income (loss)

Noncontrolling interest

Total shareholders’ equity

Total liabilities and shareholders’ equity

Pentair, Inc. and Subsidiaries

Consolidated Statements of Cash Flows

Operating activities

Adjustments to reconcile net income to net cash provided by (used for) operating activities

Loss from discontinued operations

Loss on disposal of discontinued operations

Depreciation

Amortization

Deferred income taxes

Stock compensation

Excess tax benefits from stock-based compensation

Loss on sale of assets

Changes in assets and liabilities, net of effects of business acquisitions and dispositions

Accounts and notes receivable

Inventories

Prepaid expenses and other current assets

Accounts payable

Employee compensation and benefits

Accrued product claims and warranties

Income taxes

Other current liabilities

Pension and post-retirement benefits

Other assets and liabilities

Net cash provided by (used for) continuing operations

Net cash provided by (used for) operating activities of discontinued operations

Net cash provided by (used for) operating activities

Investing activities

Acquisitions, net of cash acquired

Divestitures

Net cash provided by (used for) investing activities

Financing activities

Net short-term borrowings

Proceeds from long-term debt

Repayment of long-term debt

Debt issuance costs

Stock issued to employees, net of shares withheld

Repurchases of common stock

Dividends paid

Distribution to noncontrolling interest

Net cash provided by (used for) financing activities

Effect of exchange rate changes on cash and cash equivalents

Change in cash and cash equivalents

Cash and cash equivalents, beginning of period

Cash and cash equivalents, end of period

Pentair, Inc.

Consolidated Statements of Changes in Shareholders’ Equity

Balance — December 31, 2007

Net income

Change in cumulative translation adjustment

Adjustment in retirement liability, net of $42,793 tax

Changes in market value of derivative financial instruments, net of ($6,284) tax

Comprehensive income (loss)

Cash dividends — $0.68 per common share

Tax benefit of stock compensation

Share repurchase

Exercise of stock options, net of 121,638 shares tendered for payment

Issuance of restricted shares, net of cancellations

Amortization of restricted shares

Shares surrendered by employees to pay taxes

Stock compensation

PRF Acquisition

Balance — December 31, 2008

Adjustment in retirement liability, net of $164 tax

Changes in market value of derivative financial instruments, net of ($2,323) tax

Cash dividends — $0.72 per common share

Exercise of stock options, net of 124,613 shares tendered for payment

Balance — December 31, 2009

Adjustment in retirement liability, net of ($8,159) tax

Changes in market value of derivative financial instruments, net of $229 tax

Cash dividends — $0.76 per common share

Distribution to noncontrolling interest

Exercise of stock options, net of 27,177 shares tendered for payment

Balance — December 31, 2010

Pentair, Inc. and Subsidiaries

Notes to consolidated financial statements

1. Summary of Significant Accounting Policies

Fiscal year

Our fiscal year ends on December 31. We report our interim quarterly periods on a 13-week basis ending on a Saturday.

Principles of consolidation

The accompanying consolidated financial statements include the accounts of Pentair and all subsidiaries, both U.S. and non-U.S., that we control. Intercompany accounts and transactions have been eliminated. Investments in companies of which we own 20% to 50% of the voting stock or have the ability to exercise significant influence over operating and financial policies of the investee are accounted for using the equity method of accounting and as a result, our share of the earnings or losses of such equity affiliates is included in the Consolidated Statements of Income.

Use of estimates

The preparation of our consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires us to make estimates and assumptions that affect the amounts reported in these consolidated financial statements and accompanying notes. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may be based upon amounts that could differ from those estimates. The critical accounting policies that require our most significant estimates and judgments include:

Revenue recognition

We recognize revenue when it is realized or realizable and has been earned. Revenue is recognized when persuasive evidence of an arrangement exists; shipment or delivery has occurred (depending on the terms of the sale); the seller’s price to the buyer is fixed or determinable; and collectability is reasonably assured.

Generally, there is no post-shipment obligation on product sold other than warranty obligations in the normal and ordinary course of business. In the event significant post-shipment obligations were to exist, revenue recognition would be deferred until substantially all obligations were satisfied.

Sales returns

The right of return may exist explicitly or implicitly with our customers. Our return policy allows for customer returns only upon our authorization. Goods returned must be product we continue to market and must be in salable condition. Returns of custom or modified goods are normally not allowed. At the time of sale, we reduce revenue for the estimated effect of returns. Estimated sales returns include consideration of historical sales levels, the timing and magnitude of historical sales return levels as a percent of sales, type of product, type of customer and a projection of this experience into the future.

Pricing and sales incentives

We record estimated reductions to revenue for customer programs and incentive offerings including pricing arrangements, promotions and other volume-based incentives at the later of the date revenue is recognized or the incentive is offered. Sales incentives given to our customers are recorded as a reduction of revenue unless we (1) receive an identifiable benefit for the goods or services in exchange for the consideration and (2) we

Notes to consolidated financial statements — (continued)

can reasonably estimate the fair value of the benefit received. The following represents a description of our pricing arrangements, promotions and other volume-based incentives:

Pricing arrangements

Pricing is established up front with our customers and we record sales at the agreed-upon net selling price. However, one of our businesses allows customers to apply for a refund of a percentage of the original purchase price if they can demonstrate sales to a qualifying OEM customer. At the time of sale, we estimate the anticipated refund to be paid based on historical experience and reduce sales for the probable cost of the discount. The cost of these refunds is recorded as a reduction in gross sales.

Promotions

Our primary promotional activity is what we refer to as cooperative advertising. Under our cooperative advertising programs, we agree to pay the customer a fixed percentage of sales as an allowance that may be used to advertise and promote our products. The customer is generally not required to provide evidence of the advertisement or promotion. We recognize the cost of this cooperative advertising at the time of sale. The cost of this program is recorded as a reduction in gross sales.

Volume-based incentives

These incentives involve rebates that are negotiated up front with the customer and are redeemable only if the customer achieves a specified cumulative level of sales or sales increase. Under these incentive programs, at the time of sale, we reforecast the anticipated rebate to be paid based on forecasted sales levels. These forecasts are updated at least quarterly for each customer and sales are reduced for the anticipated cost of the rebate. If the forecasted sales for a customer changes, the accrual for rebates is adjusted to reflect the new amount of rebates expected to be earned by the customer.

Shipping and handling costs

Amounts billed to customers for shipping and handling are recorded in Net sales in the accompanying Consolidated Statements of Income. Shipping and handling costs incurred by Pentair for the delivery of goods to customers are included in Cost of goods sold in the accompanying Consolidated Statements of Income.

We conduct research and development (“R&D”) activities in our own facilities, which consist primarily of the development of new products, product applications and manufacturing processes. We expense R&D costs as incurred. R&D expenditures during 2010, 2009 and 2008 were $67.2 million, $57.9 million and $62.5 million, respectively.

Cash equivalents

We consider highly liquid investments with original maturities of three months or less to be cash equivalents.

Trade receivables and concentration of credit risk

We record an allowance for doubtful accounts; reducing our receivables balance to an amount we estimate is collectible from our customers. Estimates used in determining the allowance for doubtful accounts are based on historical collection experience, current trends, aging of accounts receivable and periodic credit evaluations of our customers’ financial condition. We generally do not require collateral. No customer receivable balances exceeded 10% of total net receivable balances as of December 31, 2010. One customer had a receivable balance of approximately 10% of the total net receivable balance as of December 31, 2009.

In December 2008 we sold approximately $44 million of one customer’s accounts receivable to a third-party financial institution to mitigate accounts receivable concentration risk. Sales of accounts receivable are reflected as a reduction of accounts receivable in our Consolidated Balance Sheets and the proceeds are

included in the cash flows from operating activities in our Consolidated Statements of Cash Flows. In 2008, a loss in the amount of $0.5 million related to the sale of accounts receivable is included in the line item Other in our Consolidated Statements of Income. We did not undertake a similar sale of customer receivables in 2010 or 2009.

Inventories

Inventories are stated at the lower of cost or market with substantially all costed using the first-in, first-out (“FIFO”) method and with an insignificant amount of inventories located outside the United States costed using a moving average method which approximates FIFO.

Property, plant and equipment

Property, plant and equipment is stated at historical cost. We compute depreciation by the straight-line method based on the following estimated useful lives:

Land improvements

Buildings and leasehold improvements

Machinery and equipment

Significant improvements that add to productive capacity or extend the lives of properties are capitalized. Costs for repairs and maintenance are charged to expense as incurred. When property is retired or otherwise disposed of, the cost and related accumulated depreciation are removed from the accounts and any related gains or losses are included in income.

We review the recoverability of long-lived assets to be held and used, such as property, plant and equipment, when events or changes in circumstances occur that indicate the carrying value of the asset or asset group may not be recoverable. The assessment of possible impairment is based on our ability to recover the carrying value of the asset or asset group from the expected future pre-tax cash flows (undiscounted and without interest charges) of the related operations. If these cash flows are less than the carrying value of such asset or asset group, an impairment loss is recognized for the difference between estimated fair value and carrying value. Impairment losses on long-lived assets held for sale are determined in a similar manner, except that fair values are reduced for the cost to dispose of the assets. The measurement of impairment requires us to estimate future cash flows and the fair value of long-lived assets.

Goodwill and identifiable intangible assets

expenses, projected capital expenditures, changes in working capital and the appropriate discount rate. Use of the market approach consists of comparisons to comparable publicly-traded companies that are similar in size and industry. Actual results may differ from those used in our valuations. This non-recurring fair value measurement is a “Level 3” measurement under the fair value hierarchy described below.

In developing our discounted cash flow analysis, assumptions about future revenues and expenses, capital expenditures and changes in working capital, are based on our annual operating plan and long-term business plan for each of our reporting units. These plans take into consideration numerous factors including historical experience, anticipated future economic conditions, changes in raw material prices and growth expectations for the industries and end markets we participate in. These assumptions are determined over a five year long-term planning period. The five year growth rates for revenues and operating profits vary for each reporting unit being evaluated. Revenues and operating profit beyond 2017 are projected to grow at a 3% perpetual growth rate for all reporting units.

Discount rate assumptions for each reporting unit take into consideration our assessment of risks inherent in the future cash flows of the respective reporting unit and our weighted-average cost of capital. We utilized discount rates ranging from 13% to 15% in determining the discounted cash flows in our fair value analysis.

In estimating fair value using the market approach, we identify a group of comparable publicly-traded companies for each operating segment that are similar in terms of size and product offering. These groups of comparable companies are used to develop multiples based on total market-based invested capital as a multiple of earnings before interest, taxes, depreciation and amortization (EBITDA). We determine our estimated values by applying these comparable EBITDA multiples to the operating results of our reporting units. The ultimate fair value of each reporting unit is determined considering the results of both valuation methods.

Identifiable intangible assets

Our primary identifiable intangible assets include trade marks and trade names, patents, non-compete agreements, proprietary technology and customer relationships. Identifiable intangibles with finite lives are amortized and those identifiable intangibles with indefinite lives are not amortized. Identifiable intangible assets that are subject to amortization are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Identifiable intangible assets not subject to amortization are tested for impairment annually or more frequently if events warrant. During the fourth quarter of 2010 and 2009, we completed our annual impairment test for those identifiable assets not subject to amortization and recorded impairment charges in 2009 of $11.3 million, related to trade names. These charges were recorded in Selling, general and administrative in our Consolidated Statements of Income. There was no impairment charge required in 2010.

The impairment test consists of a comparison of the fair value of the trade name with its carrying value. Fair value is measured using the relief-from-royalty method. This method assumes the trade name has value to the extent that their owner is relieved of the obligation to pay royalties for the benefits received from them. This method requires us to estimate the future revenue for the related brands, the appropriate royalty rate and the weighted average cost of capital. This non-recurring fair value measurement is a “Level 3” measurement under the fair value hierarchy described below. The impairment charge was the result of significant declines in sales volume. These charges were recorded in Selling, general and administrative in our Consolidated Statements of Income.

intangible assets, any future impairment of these assets could have a material adverse effect on our financial results.

Equity method investments

We have investments that are accounted using the equity method. Our proportionate share of income or losses from investments accounted for under the equity method is recorded in the Consolidated Statements of Income. We write down or write off an investment and recognize a loss when events or circumstances indicate there is impairment in the investment that is other-than-temporary. This requires significant judgment, including assessment of the investees’ financial condition and in certain cases the possibility of subsequent rounds of financing, as well as the investees’ historical and projected results of operations and cash flows. If the actual outcomes for the investees are significantly different from projections, we may incur future charges for the impairment of these investments.

We have a 50% investment in FARADYNE Motors LLC (“FARADYNE”), a joint venture with ITT Water Technologies, Inc. that began design, development and manufacturing of submersible pump motors in 2005. We do not consolidate the investment in our consolidated financial statements as we do not have a controlling interest over the investment. There were investments in and loans to FARADYNE of $6.1 million and $4.5 million at December 31, 2010 and December 31, 2009, respectively, which is net of our proportionate share of the results of their operations.

Income taxes

We use the asset and liability approach to account for income taxes. Under this method, deferred tax assets and liabilities are recognized for the expected future tax consequences of differences between the carrying amounts of assets and liabilities and their respective tax basis using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period when the change is enacted. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. Changes in valuation allowances from period to period are included in our tax provision in the period of change. We recognize the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs.

We recognize environmental clean-up liabilities on an undiscounted basis when a loss is probable and can be reasonably estimated. Such liabilities generally are not subject to insurance coverage. The cost of each environmental clean-up is estimated by engineering, financial and legal specialists based on current law. Such estimates are based primarily upon the estimated cost of investigation and remediation required and the likelihood that, where applicable, other potentially responsible parties (“PRPs”) will be able to fulfill their commitments at the sites where Pentair may be jointly and severally liable. The process of estimating environmental clean-up liabilities is complex and dependent primarily on the nature and extent of historical information and physical data relating to a contaminated site, the complexity of the site, the uncertainty as to what remedy and technology will be required and the outcome of discussions with regulatory agencies and other PRPs at multi-party sites. In future periods, new laws or regulations, advances in clean-up technologies and additional information about the ultimate clean-up remedy that is used could significantly change our estimates. Accruals for environmental liabilities are included in Other current liabilities and Other non-current liabilities in the Consolidated Balance Sheets.

Insurance subsidiary

We insure certain general and product liability, property, workers’ compensation and automobile liability risks through our regulated wholly-owned captive insurance subsidiary, Penwald Insurance Company (“Penwald”). Reserves for policy claims are established based on actuarial projections of ultimate losses. As of December 31, 2010 and 2009, reserves for policy claims were $49.0 million ($12.0 million included in Accrued product claims and warranties and $37.0 million included in Other non-current liabilities) and $56.3 million ($10.0 million included in Accrued product claims and warranties and $46.3 million included in Other non-current liabilities), respectively.

Stock-based compensation

We account for stock-based compensation awards on a fair value basis. The estimated grant date fair value of each option award is recognized in income on an accelerated basis over the requisite service period (generally the vesting period). The estimated fair value of each option award is calculated using the Black-Scholes option-pricing model. From time to time, we have elected to modify the terms of the original grant. These modified grants are accounted for as a new award and measured using the fair value method, resulting in the inclusion of additional compensation expense in our Consolidated Statements of Income. Restricted share awards and units are recorded as compensation cost on a straight-line basis over the requisite service periods based on the market value on the date of grant.

Earnings per common share

Basic earnings per share are computed by dividing net income by the weighted-average number of common shares outstanding. Diluted earnings per share are computed by dividing net income by the weighted-average number of common shares outstanding including the dilutive effects of common stock equivalents. The dilutive effects of stock options and restricted stock awards and units increased weighted average common shares outstanding by 1,257 thousand, 1,107 thousand and 1,181 thousand in 2010, 2009 and 2008, respectively.

Stock options excluded from the calculation of diluted earnings per share because the exercise price was greater than the average market price of the common shares were 3,711 thousand, 5,283 thousand and 5,268 thousand in 2010, 2009 and 2008, respectively.

Derivative financial instruments

We recognize all derivatives, including those embedded in other contracts, as either assets or liabilities at fair value in our Consolidated Balance Sheets. If the derivative is designated as a fair-value hedge, the changes in the fair value of the derivative and the hedged item are recognized in earnings. If the derivative is designated and is effective as a cash-flow hedge, changes in the fair value of the derivative are recorded in other comprehensive income (“OCI”) and are recognized in the Consolidated Statements of Income when the hedged item affects earnings. If the underlying hedged transaction ceases to exist or if the hedge becomes ineffective, all changes in fair value of the related derivatives that have not been settled are recognized in current earnings. For a derivative that is not designated as or does not qualify as a hedge, changes in fair value are reported in earnings immediately.

We use derivative instruments for the purpose of hedging interest rate and currency exposures, which exist as part of ongoing business operations. We do not hold or issue derivative financial instruments for trading or speculative purposes. All other contracts that contain provisions meeting the definition of a derivative also meet the requirements of and have been designated as, normal purchases or sales. Our policy is not to enter into contracts with terms that cannot be designated as normal purchases or sales. From time to time, we may enter in to short duration foreign currency contracts to hedge foreign currency risks on intercompany transactions.

Fair value measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Assets and liabilities measured at fair value are classified using the following hierarchy, which is based upon the transparency of inputs to the valuation as of the measurement date:

Level 1: Valuation is based on observable inputs such as quoted market prices (unadjusted) for identical assets or liabilities in active markets.

Level 2: Valuation is based on inputs such as quoted market prices for similar assets or liabilities in active markets or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.

Level 3: Valuation is based upon other unobservable inputs that are significant to the fair value measurement.

In making fair value measurements, observable market data must be used when available. When inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement.

Foreign currency translation

The financial statements of subsidiaries located outside of the U.S. are measured using the local currency as the functional currency. Assets and liabilities of these subsidiaries are translated at the rates of exchange at the balance sheet date. Income and expense items are translated at average monthly rates of exchange. The resultant translation adjustments are included in Accumulated other comprehensive income (loss) (“AOCI”), a separate component of shareholders’ equity.

New accounting standards

On January 1, 2009, we adopted new accounting guidance that changes the accounting and reporting for minority interests. Minority interests have been recharacterized as noncontrolling interests and are reported as a component of equity separate from the parent’s equity. Purchases or sales of equity interests that do not result in a change in control will be accounted for as equity transactions. In addition, net income attributable to the noncontrolling interest will be included in consolidated net income on the face of the Consolidated Income Statements and upon a loss of control, the interest sold, as well as any interest retained, will be recorded at fair value with any gain or loss recognized in earnings. We have classified noncontrolling interest (previously minority interest) as a component of equity for all periods presented.

In June 2009, the Financial Accounting Standards Board issued an amendment to the accounting and disclosure requirements for the consolidation of variable interest entities. The guidance affects the overall consolidation analysis and requires enhanced disclosures on involvement with variable interest entities. The guidance is effective for fiscal years beginning after November 15, 2009. We adopted the new guidance as of January 1, 2010, which did not have any effect on our consolidated financial statements.

Subsequent events

In connection with preparing the audited consolidated financial statements for the year ended December 31, 2010, we have evaluated subsequent events for potential recognition and disclosure through the date of this filing.

2. Acquisitions

On June 28, 2008, we entered into a transaction with GE Water & Process Technologies (a unit of General Electric Company) (“GE”) that was accounted for as an acquisition of an 80.1 percent ownership interest in GE’s global water softener and residential water filtration business in exchange for a 19.9 percent interest in

our global water softener and residential water filtration business. The acquisition was effected through the formation of two new entities (collectively, “Pentair Residential Filtration” or “PRF”), a U.S. entity and an international entity, into which we and GE contributed certain assets, properties, liabilities and operations representing our respective global water softener and residential water filtration businesses. We are an 80.1 percent owner of PRF and GE is a 19.9 percent owner. The fair value of the acquisition was $229.2 million, which includes approximately $3.3 million of acquisition related costs. The acquisition and related sale of our 19.9 percent interest resulted in a gain of $109.6 million ($85.8 million after tax), representing the difference between the carrying amount and the fair value of the 19.9 percent interest sold.

With the formation of Pentair Residential Filtration, we believe we are better positioned to serve residential customers with industry-leading technical applications in the areas of water conditioning, whole-house filtration, point of use water management and water sustainability and expect to accelerate revenue growth by selling GE’s existing residential conditioning products through our sales channels.

The fair value of the 80.1 percent interest in the global water softener and residential water filtration business of GE acquired was determined using both an income approach and a market approach. The income approach utilizes a discounted cash flow analysis based on certain key assumptions including a discount rate based on a computed weighted average cost of capital and expected long-term revenue and expense growth rates. The market approach indicates the fair value of a business based on a comparison of the business to guideline publicly traded companies and transactions in its industry.

The fair value of the business acquired was allocated to the assets acquired and liabilities assumed based on their estimated fair values. The excess of the fair value acquired over the identifiable assets acquired and liabilities assumed is reflected as goodwill. Goodwill recorded as part of the purchase price allocation was approximately $137.9 million, none of which is tax deductible. Identifiable intangible assets acquired as part of the acquisition were $66.5 million, including definite-lived intangibles, such as customer relationships, proprietary technology and trade names with a weighted average amortization period of approximately 15 years.

The following pro forma consolidated condensed financial results of operations for the year ended December 31, 2008 is presented as if the acquisition had been completed at the beginning of the period presented:

Pro forma net sales from continuing operations

Pro forma net income from continuing operations

Pro forma net income

Pro forma earnings per common share — continuing operations

These pro forma consolidated condensed financial results have been prepared for comparative purposes only and include certain adjustments. The adjustments do not reflect the effect of synergies that would have been expected to result from the integration of this acquisition. The pro forma information does not purport to be indicative of the results of operations that actually would have resulted had the combination occurred on January 1, or of future results of the consolidated entities.

3. Discontinued Operations

In 2010 we were notified of a product recall required by our former Tools Group (which was sold to Black and Decker Corporation in 2004 and treated as a discontinued operation). Under the terms of the sale agreement we are liable for a portion of the product recall costs for products sold prior to the date of sale of the Tools Group. We recorded a liability of $3.2 million ($2.0 million net of tax) in 2010 representing our estimate of the potential cost associated with this recall. In addition, we received the remaining escrow balances from our sale of Lincoln Industrial of approximately $0.5 million, and we reversed tax reserves of approximately $1.0 million due to the expiration of various statues of limitations.

Operating results of the discontinued operations are summarized below:

Net Sales

Loss from discontinued operations before income taxes

Income tax benefit on operations

Gain (loss) on disposal of discontinued operations, before taxes

Income tax (expense) benefit on (loss)

During 2009 and 2008, we announced and initiated certain business restructuring initiatives aimed at reducing our fixed cost structure and rationalizing our manufacturing footprint. These initiatives included the announcement of the closure of certain manufacturing facilities as well as the reduction in hourly and salaried headcount of approximately 800 and 1700 employees in 2009 and 2008, respectively, which included 350 and 1,300 in the Water Group and 450 and 400 in the Technical Products Group. These actions were generally completed by the end of 2009.

Restructuring related costs included in Selling, general and administrative expenses on the Consolidated Statements of Income include costs for severance and related benefits, asset impairment charges and other restructuring costs as follows:

Severance and related costs

Asset impairment

Contract termination costs

Total restructuring costs

Total restructuring costs related to the Water Group and the Technical Products Group were $7.7 million and $9.5 million, respectively, for year ended December 31, 2009. Total restructuring costs related to the Water Group and the Technical Products Group were $36.3 million and $8.9 million, respectively, for year ended December 31, 2008.

Restructuring accrual activity recorded on the Consolidated Balance Sheets is summarized as follows:

Beginning balance

Costs incurred

Cash payments and other

Ending balance

The changes in the carrying amount of goodwill for the year ended December 31, 2010 and December 31, 2009 by segment were as follows:

Consolidated Total

Included in “Foreign Currency Translation/Other” in 2009 is the effect of an immaterial error corrected in 2009 related to the previous accounting treatment for certain acquisitions. The correction resulted in a decrease in goodwill and a decrease of deferred tax liabilities of $28.5 million ($27.5 million in the Water Group and $1.0 million in the Technical Products Group).

The detail of acquired intangible assets consisted of the following:

Finite-life intangibles

Patents

Non-compete agreements

Proprietary technology

Customer relationships

Trade names

Total finite-life intangibles

Indefinite-life intangibles

Total intangibles, net

Intangible asset amortization expense in 2010, 2009 and 2008 was approximately $24.5 million, $27.3 million and $24.0 million, respectively.

In 2009 we recorded an impairment charge to write down trade name intangible assets of $11.3 million in the Water Group. Additionally, in 2008 we recorded an impairment charge to write-off a trade name intangible asset of $1.0 million in the Technical Products Group.

The estimated future amortization expense for identifiable intangible assets during the next five years is as follows:

Estimated amortization expense

Inventories

Raw materials and supplies

Work-in-process

Finished goods

Total inventories

Property, plant and equipment

Land and land improvements

Construction in progress

Total property, plant and equipment

Less accumulated depreciation and amortization

Property, plant and equipment, net

The following table summarizes supplemental cash flow information:

Interest payments

Income tax payments

Components of accumulated other comprehensive income (loss) consists of the following:

Retirement liability adjustments, net of tax

Cumulative translation adjustments

Market value of derivative financial instruments, net of tax

Accumulated other comprehensive income (loss)

Debt and the average interest rates on debt outstanding are summarized as follows:

Revolving credit facilities

Private placement — fixed rate

Private placement — floating rate

Total debt, including current portion per balance sheet

Less: Current maturities

Short-term borrowings

Long-term debt

We have a multi-currency revolving Credit Facility (“Credit Facility”). The Credit Facility creates an unsecured, committed revolving credit facility of up to $800 million, with multi-currency sub facilities to support investments outside the U.S. The Credit Facility expires on June 4, 2012. Borrowings under the Credit Facility bear interest at the rate of LIBOR plus 0.625%. Interest rates and fees on the Credit Facility vary based on our credit ratings.

We are authorized to sell short-term commercial paper notes to the extent availability exists under the Credit Facility. We use the Credit Facility as back-up liquidity to support 100% of commercial paper outstanding. Our use of commercial paper as a funding vehicle depends upon the relative interest rates for our paper compared to the cost of borrowing under our Credit Facility. As of December 31, 2010 and December 31, 2009 we had no outstanding commercial paper.

Total availability under our existing Credit Facility was $702.5 million as of December 31, 2010, which was not limited by any of the credit agreement’s financial covenants as of that date.

Our debt agreements contain certain financial covenants, the most restrictive of which is a leverage ratio (total consolidated indebtedness, as defined, over consolidated EBITDA, as defined) that may not exceed 3.5 to 1.0. We were in compliance with all financial covenants in our debt agreements as of December 31, 2010.

On July 8, 2008, we commenced a cash tender offer for all of our outstanding $250 million aggregate principal of 7.85% Senior Notes due 2009 (the “Notes”). Upon expiration of the tender offer on August 4, 2008, we purchased $116.1 million aggregate principal amount of the Notes. As a result of this transaction, we recognized a loss of $4.6 million on early extinguishment of debt in 2008. The loss included the write off of $0.1 million in unamortized deferred financing fees in addition to recognition of $0.6 million in previously unrecognized swap gains and cash paid of $5.1 million related to the tender premium and other costs associated with the purchase.

Debt outstanding at December 31, 2010 matures on a calendar year basis as follows:

Contractual debt obligation maturities

Cash-flow Hedges

In August 2007, we entered into a $105 million interest rate swap agreement with a major financial institution to exchange variable rate interest payment obligations for a fixed rate obligation without the exchange of the underlying principal amounts in order to manage interest rate exposures. The effective date of the swap was August 30, 2007. The swap agreement has a fixed interest rate of 4.89% and expires in May 2012. The fixed interest rate of 4.89% plus the .50% interest rate spread over LIBOR results in an effective fixed interest rate of 5.39%. The fair value of the swap was a liability of $6.4 million and $8.1 million at December 31, 2010 and December 31, 2009, respectively and was recorded in AOCI on the Consolidated Balance Sheets.

In September 2005, we entered into a $100 million interest rate swap agreement with several major financial institutions to exchange variable-rate interest payment obligations for fixed-rate obligations without the exchange of the underlying principal amounts in order to manage interest rate exposures. The effective date of the fixed-rate swap was April 25, 2006. The swap agreement has a fixed interest rate of 4.68% and expires in July 2013. The fixed interest rate of 4.68% plus the .60% interest rate spread over LIBOR results in an effective fixed interest rate of 5.28%. The fair value of the swap was a liability of $9.4 million and $8.3 million at December 31, 2010 and December 31, 2009, respectively and was recorded in AOCI on the Consolidated Balance Sheets.

The variable to fixed interest rate swaps are designated as cash-flow hedges. The fair value of these swaps are recorded as assets or liabilities on the Consolidated Balance Sheets. Unrealized income/expense is included in

AOCI and realized income/expense and amounts due to/from swap counterparties, are included in earnings. We realized incremental interest expense resulting from the swaps of $9.2 million and $7.9 million at December 31, 2010 and December 31, 2009, respectively.

The variable to fixed interest rate swaps are designated as and are effective as cash-flow hedges. The fair value of these swaps are recorded as assets or liabilities on the Consolidated Balance Sheets, with changes in their fair value included in OCI. Derivative gains and losses included in OCI are reclassified into earnings at the time the related interest expense is recognized or the settlement of the related commitment occurs.

At December 31, 2010 and 2009, our interest rate swaps are carried at fair value measured on a recurring basis. Fair values are determined through the use of models that consider various assumptions, including time value, yield curves, as well as other relevant economic measures, which are inputs that are classified as Level 2 in the valuation hierarchy.

Foreign currency hedges

At December 31, 2010 we had a euro to U.S. dollar contract that expired on January 7, 2011 with a notional amount of $132.5 million. The fair value of the contract was an asset of $1.2 million.

Fair value of financial instruments

The recorded amounts and estimated fair values of long-term debt, excluding the effects of derivative financial instruments and the recorded amounts and estimated fair value of those derivative financial instruments were as follows:

Total debt, including current portion

Variable rate

Fixed rate

Derivative financial instruments

Market value of interest rate swaps and foreign currency contracts, net

The following methods were used to estimate the fair values of each class of financial instrument measured on a recurring basis:

Income from continuing operations before income taxes and noncontrolling interest consisted of the following:

U.S.

International

Income from continuing operations before taxes and noncontrolling interest

The provision for income taxes for continuing operations consisted of the following:

Currently payable

Federal

State

Total current taxes

Deferred

Federal and state

Total deferred taxes

Total provision for income taxes

Reconciliation of the U.S. statutory income tax rate to our effective tax rate for continuing operations follows:

U.S. statutory income tax rate

State income taxes, net of federal tax benefit

Tax effect of stock-based compensation

Tax effect of international operations

Tax credits

Domestic manufacturing deduction

ESOP dividend benefit

All other, net

Effective tax rate on continuing operations

Reconciliation of the beginning and ending gross unrecognized tax benefits follows:

Gross unrecognized tax benefits — beginning balance

Gross increases for tax positions in prior periods

Gross decreases for tax positions in prior periods

Gross increases based on tax positions related to the current year

Gross decreases related to settlements with taxing authorities

Reductions due to statute expiration

Gross unrecognized tax benefits at December 31

Included in the $24.3 million of total gross unrecognized tax benefits as of December 31, 2010 was $22.4 million of tax benefits that, if recognized, would impact the effective tax rate. It is reasonably possible that the gross unrecognized tax benefits as of December 31, 2010 may decrease by a range of $0 to $17.5 million during the next twelve months primarily as a result of the resolution of federal, state and foreign examinations and the expiration of various statutes of limitations.

The determination of annual income tax expense takes into consideration amounts which may be needed to cover exposures for open tax years. The Internal Revenue Service (“IRS”) has examined our U.S. federal income tax returns through 2003 with no material adjustments. The IRS has also completed a survey of our 2004 U.S. federal income tax return with no material findings. The IRS is currently examining our federal tax returns for years 2005 through 2009. No material adjustments have been proposed, however, actual settlements may differ from amounts accrued.

We record penalties and interest related to unrecognized tax benefits in Provision for income taxes and Interest expense, respectively, which is consistent with our past practices. As of December 31, 2010, we had recorded approximately $0.8 million for the possible payment of penalties and $4.8 million related to the possible payment of interest expense.

U.S. income taxes have not been provided on undistributed earnings of international subsidiaries. It is our intention to reinvest these earnings permanently or to repatriate the earnings only when it is tax effective to do so. As of December 31, 2010, approximately $223.7 million of unremitted earnings attributable to international subsidiaries were considered to be indefinitely invested. It is not practicable to estimate the amount of tax that might be payable if such earnings were to be remitted.

Deferred taxes arise because of different treatment between financial statement accounting and tax accounting, known as “temporary differences.” We record the tax effect of these temporary differences as “deferred tax assets” (generally items that can be used as a tax deduction or credit in future periods) and “deferred tax liabilities” (generally items for which we received a tax deduction but the tax impact has not yet been recorded in the Consolidated Statements of Income).

Deferred taxes were classified in the Consolidated Balance Sheets as follows:

Deferred tax assets

Other noncurrent assets

Other current liabilities

Deferred tax liabilities

Net deferred tax liability

The tax effects of the major items recorded as deferred tax assets and liabilities are as follows:

Accounts receivable allowances

Inventory valuation

Accelerated depreciation/amortization

Accrued product claims and warranties

Employee benefit accruals

Goodwill and other intangibles

Other, net

Included in Other, net in the table above are deferred tax assets of $2.3 million and $4.7 million as of December 31, 2010 and 2009, respectively, related to a foreign tax credit carryover from the tax period ended December 31, 2006 and related to state net operating losses. The foreign tax credit is eligible for carryforward until the tax period ending December 31, 2016.

Non-U.S. tax losses of $49.6 million and $49.1 million were available for carryforward at December 31, 2010 and 2009, respectively. A valuation allowance reflected above in Other, net of $9.4 million and $7.5 million exists for deferred income tax benefits related to the non-U.S. loss carryforwards available as of December 31, 2010 and 2009, respectively that may not be realized. We believe that sufficient taxable income will be generated in the respective countries to allow us to fully recover the remainder of the tax losses. The non-U.S. operating losses are subject to varying expiration periods and will begin to expire in 2011. State tax losses of $69.3 million and $73.0 million were available for carryforward at December 31, 2010 and 2009, respectively. A valuation allowance reflected above in Other, net of $2.4 million and $2.6 million exists for deferred income tax benefits related to the carryforwards available at December 31, 2010 and 2009, respectively. Certain state tax losses will expire in 2011, while others are subject to carryforward periods of up to twenty years.

Pension and post-retirement benefits

We sponsor domestic and foreign defined-benefit pension and other post-retirement plans. Pension benefits are based principally on an employee’s years of service and/or compensation levels near retirement. In addition, we also provide certain post-retirement health care and life insurance benefits. Generally, the post-retirement health care and life insurance plans require contributions from retirees. We use a December 31 measurement date each year. In December 2007, we announced that we will be freezing certain pension plans as of December 31, 2017.

Obligations and Funded Status

The following tables present reconciliations of the benefit obligation of the plans, the plan assets of the pension plans and the funded status of the plans:

Change in benefit obligation

Benefit obligation beginning of year

Service cost

Interest cost

Amendments

Settlements

Actuarial (gain) loss

Translation (gain) loss

Benefits paid

Benefit obligation end of year

Change in plan assets

Fair value of plan assets beginning of year

Actual gain (loss) return on plan assets

Company contributions

Translation gain (loss)

Fair value of plan assets end of year

Funded status

Plan assets less than benefit obligation

Net amount recognized

Of the $201.3 million underfunding at December 31, 2010, $123.6 million relates to foreign pension plans and our supplemental executive retirement plans which are not commonly funded.

Amounts recognized in the Consolidated Balance Sheets are as follows:

Current liabilities

Noncurrent liabilities

The accumulated benefit obligation for all defined benefit plans was $557.7 million and $534.9 million at December 31, 2010 and 2009, respectively.

Information for pension plans with an accumulated benefit obligation or projected benefit obligation in excess of plan assets are as follows:

Pension plans with an accumulated benefit obligation in excess of plan assets:

Fair value of plan assets

Accumulated benefit obligation

Pension plans with a projected benefit obligation in excess of plan assets:

Components of net periodic benefit cost are as follows:

Expected return on plan assets

Amortization of transition

obligation

Amortization of prior year

service cost (benefit)

Recognized net actuarial (gain) loss

Settlement gain

Net periodic benefit cost

Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive income (pre-tax):

Net transition obligation

Prior service cost (benefit)

Net actuarial (gain) loss

Accumulated other comprehensive (income) loss

The estimated amount that will be amortized from accumulated other comprehensive income into net periodic benefit cost in 2011 is as follows:

Total estimated 2011 amortization

Additional Information

Change in accumulated other comprehensive income, net of tax:

Beginning of the year

Additional prior service cost incurred during the year

Actuarial gains (losses) incurred during the year

Translation gains (losses) incurred during the year

Amortization during the year:

Transition obligation

Unrecognized prior service cost (benefit)

Actuarial gains

End of the year

Assumptions

Weighted-average assumptions used to determine domestic benefit obligations at December 31 are as follows:

Discount rate

Rate of compensation increase

Weighted-average assumptions used to determine the domestic net periodic benefit cost for years ending December 31 are as follows:

Expected long-term return on plan assets

Unrecognized pension and post-retirement losses

As of our December 31, 2010 measurement date, our plans have $117.8 million of cumulative unrecognized losses. To the extent the unrecognized losses, when adjusted for the difference between market and market related values of assets, exceeds 10% of the projected benefit obligation, it will be amortized into expense each year on a straight-line basis over the remaining expected future-working lifetime of active participants (currently approximating 12 years).

The assumed health care cost trend rates at December 31 are as follows:

Health care cost trend rate assumed for next year

Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)

Year that the rate reaches the ultimate trend rate

The assumed health care cost trend rates can have a significant effect on the amounts reported for health care plans. A one-percentage-point change in the assumed health care cost trend rates would have the following effects:

Effect on total annual service and interest cost

Effect on post-retirement benefit obligation

Plan Assets

Objective

The primary objective of our investment strategy is to meet the pension obligation to our employees at a reasonable cost to us. This is primarily accomplished through growth of capital and safety of the funds invested. The plans will therefore be actively invested to achieve real growth of capital over inflation through appreciation of securities held and through the accumulation and reinvestment of dividend and interest income.

Asset allocation

Our actual overall asset allocation for the plans as compared to our investment policy goals is as follows:

Equity Securities

Fixed Income Investments

Alternative Investments

Cash

While the target allocations do not have a percentage allocated to cash, the plan assets will always include some cash due to cash flow requirements. In 2009, as a result of our year end decision to make a $25 million

accelerated pension plan contribution, a higher percentage of assets were held in cash equivalents. This contribution was directed to be invested in fixed income investments and was invested shortly after year end. After taking this into consideration, our fixed income investment percentage would have been 30% and our cash percentage would have been 3%.

As part of our strategy to reduce U.S. pension plan funded status volatility, we plan to increase the allocation to long duration fixed income securities in future years as the funded status of our U.S. pension plans improve. In 2010 we increased our fixed income investments from 30% to 40% and from 10% to 30% in 2009.

Fair Value Measurement

The following table presents our plan assets using the fair value hierarchy as of December 31, 2010 and December 31, 2009.

Cash Equivalents

Fixed Income:

Corporate and Non U.S. Government

U.S. Treasuries

Mortgage-Backed Securities

Other

Global Equity Securities:

Small Cap Equity

Mid Cap Equity

Large Cap Equity

International Equity

Long/short Equity

Pentair Company Stock

Other Investments

Total as of December 31, 2010

Total as of December 31, 2009

Valuation methodologies used for investments measured at fair value are as follows:

The following tables present a reconciliation of Level 3 assets held during the years ended December 31, 2010 and December 31, 2009, respectively.

Cash Flows

Contributions

Pension contributions totaled $49.8 million and $49.0 million in 2010 and 2009, respectively. Our 2011 required pension contributions are expected to be in the range of $25 million to $30 million. The decrease in the 2011 expected contribution is primarily a result of the December 2010 accelerated contribution of $25 million to our defined benefit pension plan. The 2011 expected contributions will equal or exceed our minimum funding requirements.

Estimated Future Benefit Payments

The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid by the plans as follows:

2011

2012

2013

2014

2015

2016-2020

Savings plan

We have a 401(k) plan (“the plan”) with an employee stock ownership (“ESOP”) bonus component, which covers certain union and nearly all non-union U.S. employees who meet certain age requirements. Under the plan, eligible U.S. employees may voluntarily contribute a percentage of their eligible compensation. We match contributions made by employees who meet certain eligibility and service requirements. Our matching contribution is 100% of eligible employee contributions for the first 1% of eligible compensation and 50% of the next 5% of eligible compensation. In June 2009, we temporarily suspended the company match of the plan and ESOP. We reinstated the company match in 2010.

In addition to the matching contribution, all employees who meet certain service requirements receive a discretionary ESOP contribution equal to 1.5% of annual eligible compensation.

Our combined expense for the plan and ESOP was approximately $11.0 million, $6.7 million and $17.0 million, in 2010, 2009 and 2008, respectively.

Other retirement compensation

Total other accrued retirement compensation was $13.9 million and $17.3 million in 2010 and 2009, respectively and is included in the pension and other retirement compensation line of our Consolidated Balance Sheet.

Authorized shares

We may issue up to 250 million shares of common stock. Our Board of Directors may designate up to 15 million of those shares as preferred stock. On December 10, 2004, the Board of Directors designated a new series of preferred stock with authorization to issue up to 2.5 million shares, Series A Junior Participating Preferred Stock, par value $0.10 per share. No shares of preferred stock were issued or outstanding as of December 31, 2010 or December 31, 2009.

Purchase rights

On December 10, 2004, our Board of Directors declared a dividend of one preferred share purchase right (a “Right”) for each outstanding share of common stock. The dividend was payable upon the close of business on January 28, 2005 to the shareholders of record upon the close of business on January 28, 2005. Each Right entitles the registered holder to purchase one one-hundredth of a share of Series A Junior Participating Preferred Stock, at a price of $240.00 per one one-hundredth of a share, subject to adjustment. However, the Rights are not exercisable unless certain change in control events occur, such as a person acquiring or obtaining the right to acquire beneficial ownership of 15% or more of our outstanding common stock. The description and terms of the Rights are set forth in a Rights Agreement, dated December 10, 2004. The Rights will expire on January 28, 2015, unless the Rights are earlier redeemed or exchanged in accordance with the terms of the Rights Agreement. On January 28, 2005, the common share purchase rights issued pursuant to the Rights Agreement dated July 31, 1995 were redeemed in their entirety for an amount equal to $0.0025 per right.

Share repurchases

In December 2007, the Board of Directors authorized the repurchase of shares of our common stock during 2008 up to a maximum dollar limit of $50 million. As of December 31, 2008, we had purchased 1,549,893 shares for $50.0 million pursuant to this authorization. This authorization expired on December 31, 2008. There were no share repurchase authorizations for 2009. On July 27, 2010 the Board of Directors authorized the repurchase of shares of our common stock up to a maximum dollar limit of $25 million. As of December 31, 2010 we had repurchased 734,603 shares for $25 million pursuant to this plan. In December 2010, the Board of Directors authorized the repurchase of shares of our common stock during 2011 up to a maximum dollar limit of $25 million. The authorization expires December 2011.

Total stock-based compensation expense in 2010, 2009 and 2008 was $21.5 million, $17.3 million and $20.6 million, respectively.

Omnibus stock incentive plans

In May 2008, the 2008 Omnibus Stock Incentive Plan as Amended and Restated (the “2008 Plan” or the “Plan”) was approved by shareholders. The 2008 Plan authorizes the issuance of additional shares of our common stock and extends through February 2018. The 2008 Plan allows for the granting of:

The Plan is administered by our Compensation Committee (the “Committee”), which is made up of independent members of our Board of Directors. Employees eligible to receive awards under the Plan are managerial, administrative or other key employees who are in a position to make a material contribution to the continued profitable growth and long-term success of Pentair. The Committee has the authority to select the recipients of awards, determine the type and size of awards, establish certain terms and conditions of award grants and take certain other actions as permitted under the Plan. The Plan restricts the Committee’s authority to reprice awards or to cancel and reissue awards at lower prices.

The Omnibus Stock Incentive Plan approved by the shareholders in 2004 (the “2004 Plan”) expired upon approval of the 2008 Plan by shareholders. Prior grants made under the 2004 Plan and earlier stock incentive plans remained outstanding on the terms in effect at the time of grant.

Non-qualified and incentive stock options

Under the Plan, we may grant stock options to any eligible employee with an exercise price equal to the market value of the shares on the dates the options were granted. Options generally vest over a three-year period commencing on the grant date and expire ten years after the grant date. Prior to 2006, option grants typically had a reload feature when shares are retired to pay the exercise price, allowing individuals to receive additional options upon exercise equal to the number of shares retired. Option awards granted after 2005 under the 2004 Plan and under the 2008 Plan do not have a reload feature attached to the option. Annual expense for the fair value of stock options was $10.7 million in 2010, $7.1 million in 2009 and $10.5 million in 2008.

Restricted shares and restricted stock units

Under the Plan, eligible employees are awarded restricted shares or restricted stock units (awards) of our common stock. Share awards generally vest from two to five years after issuance, subject to continuous employment and certain other conditions. Restricted share awards are valued at market value on the date of grant and are expensed over the vesting period. Annual expense for the fair value of restricted shares and restricted stock units was $10.8 million in 2010, $10.2 million in 2009 and $10.1 million in 2008.

Stock appreciation rights, performance shares and performance units

Under the Plan, the Committee is permitted to issue these awards; however, there have been no issuances of these awards.

Outside directors nonqualified stock option plan

Nonqualified stock options were granted to outside directors under the Outside Directors Nonqualified Stock Option Plan (the “Directors Plan”) with an exercise price equal to the market value of the shares on the option grant dates. Options generally vest over a three-year period commencing on the grant date and expire ten years after the grant date. The Directors Plan expired in January 2008. Prior grants remain outstanding on the terms in effect at the time of grant.

Non-employee Directors are also eligible to receive awards under the 2008 Plan. Director awards are made by our Governance Committee, which is made up of independent members of our Board of Directors.

Stock options

The following table summarizes stock option activity under all plans:

Balance January 1, 2010

Granted

Exercised

Forfeited

Expired

Balance December 31, 2010

Options exercisable as of December 31, 2010

Options expected to vest as of December 31, 2010

Shares available for grant as of December 31, 2010

The weighted-average grant date fair value of options granted in 2010, 2009 and 2008 was estimated to be $9.47, $5.09 and $7.41 per share, respectively. The total intrinsic value of options that were exercised during 2010, 2009 and 2008 was $7.4 million, $5.2 million and $6.3 million, respectively. At December 31, 2010, the total unrecognized compensation cost related to stock options was $6.5 million. This cost is expected to be recognized over a weighted average period of 1.5 years.

We estimated the fair values using the Black-Scholes option-pricing model, modified for dividends and using the following assumptions:

Risk-free interest rate

Expected dividend yield

Expected stock price volatility

Expected lives

Cash received from option exercises for the years ended December 31, 2010, 2009 and 2008 was $14.9 million, $8.2 million and $5.6 million, respectively. The actual tax benefit realized for the tax deductions from option exercises totaled $2.8 million, $1.9 million and $2.0 million for the years ended December 31, 2010, 2009 and 2008, respectively.

Restricted Share Awards

The following table summarizes restricted share award activity under all plans:

Balance January 1, 2010

Granted

Vested

Forfeited

Balance December 31, 2010

As of December 31, 2010, there was $17.1 million of unrecognized compensation cost related to restricted share compensation arrangements granted under the 2004 Plan and the 2008 Plan. That cost is expected to be recognized over a weighted-average period of 2.3 years. The total fair value of shares vested during the years ended December 31, 2010, 2009 and 2008, was $12.7 million, $5.5 million and $7.7 million, respectively. The actual tax benefit realized for the tax deductions from restricted share compensation arrangements totaled $3.4 million, $2.2 million and $3.0 million for the years ended December 31, 2010, 2009 and 2008, respectively.

We classify our continuing operations into the following business segments based primarily on types of products offered and markets served:

The accounting policies of our operating segments are the same as those described in the summary of significant accounting policies. We evaluate performance based on the sales and operating income of the segments and use a variety of ratios to measure performance. These results are not necessarily indicative of the results of operations that would have occurred had each segment been an independent, stand-alone entity during the periods presented.

Financial information by reportable business segment is included in the following summary:

Consolidated

Other⁽¹⁾

The following table presents certain geographic information:

U.S.

Europe

Asia and other

Net sales are based on the location in which the sale originated. Long-lived assets represent property, plant and equipment, net of related depreciation.

We offer a broad array of products and systems to multiple markets and customers for which we do not have the information systems to track revenues by primary product category. However, our net sales by segment are representative of our sales by major product category.

We sell our products through various distribution channels including wholesale and retail distributors, original equipment manufacturers and home centers. In our Water segment, one customer accounted for approximately 10% of segment sales in 2010, no single customer accounted for more than 10% of segment sales in 2009 and one customer accounted for just over 10% of segment sales in 2008. In our Technical Products segment, no single customer accounted for more than 10% of segment sales in 2010, 2009 or 2008.

Operating lease commitments

Net rental expense under operating leases follows:

Gross rental expense

Sublease rental income

Net rental expense

Future minimum lease commitments under non-cancelable operating leases, principally related to facilities, vehicles, and machinery and equipment are as follows:

Minimum lease payments

Minimum sublease rentals

Net future minimum lease commitments

We have been named as defendants, targets, or PRPs in a small number of environmental clean-ups, in which our current or former business units have generally been given de minimis status. To date, none of these claims have resulted in clean-up costs, fines, penalties, or damages in an amount material to our financial position or results of operations. We have disposed of a number of businesses in the past and in certain cases, such as the disposition of the Cross Pointe Paper Corporation uncoated paper business in 1995, the disposition of the Federal Cartridge Company ammunition business in 1997, the disposition of Lincoln Industrial in 2001 and the disposition of the Tools Group in 2004, we have retained responsibility and potential liability for certain environmental obligations. We have received claims for indemnification from purchasers of these businesses and have established what we believe to be adequate accruals for potential liabilities arising out of retained responsibilities. We settled some of the claims in prior years; to date our recorded accruals have been adequate.

In addition, there are ongoing environmental issues at a limited number of sites, including one site acquired in the acquisition of Essef Corporation in 1999, which relates to operations no longer carried out at the sites. We have established what we believe to be adequate accruals for remediation costs at these sites. We do not believe that projected response costs will result in a material liability.

We may be named as a PRP at other sites in the future, for both divested and acquired businesses. When the outcome of the matter is probable and it is possible to provide reasonable estimates of our liability with respect to environmental sites, provisions have been made in accordance with GAAP. As of December 31, 2010 and 2009, our undiscounted reserves for such environmental liabilities were approximately $1.3 million and $2.3 million, respectively. We cannot ensure that environmental requirements will not change or become more stringent over time or that our eventual environmental clean-up costs and liabilities will not exceed the amount of our current reserves.

Litigation

We record liabilities for an estimated loss from a loss contingency where the outcome of the matter is probable and can be reasonably estimated. Factors that are considered when determining whether the conditions for accrual have been met include the (a) nature of the litigation, claim, or assessment, (b) progress of the case, including progress after the date of the financial statements but before the issuance date of the financial statements, (c) opinions of legal counsel and (d) management’s intended response to the litigation, claim, or assessment. Where the reasonable estimate of the probable loss is a range, we record the most likely estimate of the loss. When no amount within the range is a better estimate than any other amount, however, the minimum amount in the range is accrued. Gain contingencies are not recorded until realized.

While we believe that a material adverse impact on our consolidated financial position, results of operations, or cash flows from any such future charges is unlikely, given the inherent uncertainty of litigation, a remote possibility exists that a future adverse ruling or unfavorable development could result in future charges that could have a material adverse impact. We do and will continue to periodically reexamine our estimates of probable liabilities and any associated expenses and receivables and make appropriate adjustments to such estimates based on experience and developments in litigation. As a result, the current estimates of the potential impact on our consolidated financial position, results of operations and cash flows for the proceedings and claims could change in the future.

We are subject to various product liability lawsuits and personal injury claims. A substantial number of these lawsuits and claims are insured and accrued for by Penwald, our captive insurance subsidiary. Penwald records a liability for these claims based on actuarial projections of ultimate losses. For all other claims, accruals covering the claims are recorded, on an undiscounted basis, when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated based on existing information. The accruals are adjusted periodically as additional information becomes available. In 2004, we disposed of the Tools Group and we retained responsibility for certain product claims. We have not experienced significant unfavorable trends in either the severity or frequency of product liability lawsuits or personal injury claims.

Horizon Litigation

The Horizon litigation against our subsidiary Essef Corporation and certain of its subsidiaries by Celebrity Cruise Lines, Inc. (“Celebrity”) was settled by payment of $35 million to Celebrity in August 2008, a portion of which was covered by insurance. As a result of the settlement, we recorded a charge of $20.4 million in 2008 which is shown on the line Legal settlement in the Consolidated Statements of Income.

Warranties and guarantees

In connection with the disposition of our businesses or product lines, we may agree to indemnify purchasers for various potential liabilities relating to the sold business, such as pre-closing tax, product liability, warranty, environmental, or other obligations. The subject matter, amounts and duration of any such indemnification obligations vary for each type of liability indemnified and may vary widely from transaction to transaction. Generally, the maximum obligation under such indemnifications is not explicitly stated and as a result, the overall amount of these obligations cannot be reasonably estimated. Historically, we have not made significant payments for these indemnifications. We believe that if we were to incur a loss in any of these matters, the loss would not have a material effect on our financial condition or results of operations.

We recognize, at the inception of a guarantee, a liability for the fair value of the obligation undertaken in issuing the guarantee.

We provide service and warranty policies on our products. Liability under service and warranty policies is based upon a review of historical warranty and service claim experience. Adjustments are made to accruals as claim data and historical experience warrant.

The changes in the carrying amount of service and product warranties for the years ended December 31, 2010 and 2009 were as follows:

Balance at beginning of the year

Service and product warranty provision

Payments

Acquired

Translation

Balance at end of the period

In the ordinary course of business, we are required to commit to bonds that require payments to our customers for any non-performance. The outstanding face value of the bonds fluctuates with the value of our projects in process and in our backlog. In addition, we issue financial stand-by letters of credit primarily to secure our performance to third parties under self-insurance programs. As of December 31, 2010 and December 31, 2009, the outstanding value of these instruments totaled $116.5 million and $51.2 million, respectively.

The following table represents the 2010 quarterly financial information:

Gain (loss) on disposal of discontinued operations, net of tax

Earnings per common share attributable to Pentair, Inc.⁽¹⁾

The following table represents the 2009 quarterly financial information:

Net income from continuing operations attributable to to Pentair, Inc.

None.

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the year ended December 31, 2010, pursuant to Rule 13a-15(b) of the Securities Exchange Act of 1934 (“the Exchange Act”). Based upon their evaluation, our Chief Executive Officer and our Chief Financial Officer concluded that our disclosure controls and procedures were effective as of the year ended December 31, 2010 to ensure that information required to be disclosed by us in the reports we file or submit under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the Securities and Exchange Commission’s rules and forms and to ensure that information required to be disclosed by us in the reports we file or submit under the Exchange Act is accumulated and communicated to our management, including our principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosures.

Management’s Annual Report on Internal Control Over Financial Reporting

The report of management required under this ITEM 9A is contained in ITEM 8 of this Annual Report on Form 10-K under the caption “Management’s Report on Internal Control Over Financial Reporting.”

Attestation Report of Independent Registered Public Accounting Firm

The attestation report required under this ITEM 9A is contained in ITEM 8 of this Annual Report on Form 10-K under the caption “Report of Independent Registered Public Accounting Firm.”

Changes in Internal Control over Financial Reporting

There was no change in our internal control over financial reporting that occurred during the quarter ended December 31, 2010 that has materially affected or is reasonably likely to materially affect, our internal control over financial reporting.

Information required under this item with respect to directors is contained in our Proxy Statement for our 2011 annual meeting of shareholders under the captions “Corporate Governance Matters”, “Proposal 1 Election of Certain Directors” and “Section 16(a) Beneficial Ownership Reporting Compliance” and is incorporated herein by reference.

Information required under this item with respect to executive officers is contained in Part I of this Form 10-K under the caption “Executive Officers of the Registrant.”

Our Board of Directors has adopted Pentair’s Code of Business Conduct and Ethics and designated it as the code of ethics for the Company’s Chief Executive Officer and senior financial officers. The Code of Business Conduct and Ethics also applies to all employees and directors in accordance with New York Stock Exchange Listing Standards. We have posted a copy of Pentair’s Code of Business Conduct and Ethics on our website at www.pentair.com/code.html. We intend to satisfy the disclosure requirements under Item 5.05 of Form 8-K regarding amendments to or waivers from, Pentair’s Code of Business Conduct and Ethics by posting such information on our website at www.pentair.com/code.html.

We are not including the information contained on our website as part of or incorporating it by reference into, this report.

Information required under this item is contained in our Proxy Statement for our 2011 annual meeting of shareholders under the captions “Corporate Governance Matters — Committees of the Board — Compensation Committee,” “Compensation Discussion and Analysis,” “Compensation Committee Report,” “Executive Compensation” and “Director Compensation” and is incorporated herein by reference.

Information required under this item with respect to security ownership is contained in our Proxy Statement for our 2011 annual meeting of shareholders under the captions “Security Ownership” and is incorporated herein by reference.

The following table summarizes, as of December 31, 2010, information about compensation plans under which our equity securities are authorized for issuance:

Equity compensation plans approved by security holders:

2008 Omnibus Stock Incentive Plan

2004 Omnibus Stock Incentive Plan

Outside Directors Non-qualified Stock Option Plan

All share numbers and per share amounts described in this section have been adjusted to reflect our 2-for-1 stock split in 2004.

Information required under this item is contained in our Proxy Statement for our 2011 annual meeting of shareholders under the captions “Corporate Governance Matters — Independent Directors,” and “Corporate Governance Matters — Policies and Procedures Regarding Related Person Transactions” and is incorporated herein by reference.

Information required under this item is contained in our Proxy Statement for our 2011 annual meeting of shareholders under the caption “Audit Committee Disclosure” and is incorporated herein by reference.

(a) List of documents filed as part of this report:

(1) Financial Statements

Consolidated Statements of Income for the Years Ended December 31, 2010, 2009 and 2008

Consolidated Balance Sheets as of December 31, 2010 and 2009

Consolidated Statements of Cash Flows for the Years Ended December 31, 2010, 2009 and 2008

Consolidated Statements of Changes in Shareholders’ Equity for the Years Ended December 31, 2010, 2009 and 2008

Notes to Consolidated Financial Statements

(2) Financial Statement Schedule

Schedule II — Valuation and Qualifying Accounts

All other schedules for which provision is made in the applicable accounting regulations of the Securities and Exchange Commission have been omitted because they are not applicable or the required information is shown in the financial statements or notes thereto.

The exhibits of this Annual Report on Form 10-K included herein are set forth on the attached Exhibit Index.

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, on February 22, 2011.

PENTAIR, INC.

/s/ John L. Stauch

John L. Stauch

Executive Vice President and Chief

Financial Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities indicated, on February 22, 2011.

Signature

Title

/s/ Randall J. Hogan

/s/ Mark C. Borin

/s/ Angela D. Lageson

Schedule II — Valuation and Qualifying Accounts

Pentair, Inc and subsidiaries

Allowances for doubtful accounts

Year ended December 31, 2010

Year ended December 31, 2009

Year ended December 31, 2008

Exhibit Index

Number

Exhibit

Business description of Pentair-plc from last 10-k form