PENTAIR INC
DEF 14A, 1996-03-12
GENERAL INDUSTRIAL MACHINERY & EQUIPMENT
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<PAGE>
                            SCHEDULE 14A INFORMATION
 
                  Proxy Statement Pursuant to Section 14(a) of
            the Securities Exchange Act of 1934 (Amendment No.    )
 
    Filed by the Registrant /X/
    Filed by a Party other than the Registrant / /
 
    Check the appropriate box:
    / /  Preliminary Proxy Statement
    / /  Confidential, for Use of the Commission Only (as permitted by Rule
         14a-6(e)(2))
    /X/  Definitive Proxy Statement
    / /  Definitive Additional Materials
    / /  Soliciting  Material  Pursuant  to  Section  240.14a-11(c)  or  Section
         240.14a-12
                                   Pentair, Inc.
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)
 
- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
 
Payment of Filing Fee (Check the appropriate box):
 
/ /  $125 per  Exchange Act  Rules 0-11(c)(1)(ii),  14a-6(i)(1), 14a-6(i)(2)  or
     Item 22(a)(2) of Schedule 14A.
/ /  $500  per  each party  to  the controversy  pursuant  to Exchange  Act Rule
     14a-6(i)(3).
/ /  Fee  computed  on   table  below   per  Exchange   Act  Rules   14a-6(i)(4)
     and 0-11.
     1) Title of each class of securities to which transaction applies:

        ------------------------------------------------------------------------
     2) Aggregate number of securities to which transaction applies:

        ------------------------------------------------------------------------
     3) Per unit price or other underlying value of transaction computed
        pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the
        filing fee is calculated and state how it was determined):

        ------------------------------------------------------------------------
     4) Proposed maximum aggregate value of transaction:

        ------------------------------------------------------------------------
     5) Total fee paid:

        ------------------------------------------------------------------------

/X/  Fee paid previously with preliminary materials.

/ /  Check box if any part of the fee is offset as provided by Exchange Act Rule
     0-11(a)(2)  and identify the  filing for which the  offsetting fee was paid
     previously. Identify the previous filing by registration statement  number,
     or the Form or Schedule and the date of its filing.
     1) Amount Previously Paid:

        ------------------------------------------------------------------------
     2) Form, Schedule or Registration Statement No.:

        ------------------------------------------------------------------------
     3) Filing Party:

        ------------------------------------------------------------------------
     4) Date Filed:

        ------------------------------------------------------------------------




<PAGE>
                                 PENTAIR, INC.
 
                            1500 County Road B2 West
                          Saint Paul, Minnesota 55113
                    NOTICE OF ANNUAL MEETING OF SHAREHOLDERS
                           TO BE HELD APRIL 24, 1996
 
To our Shareholders:
 
    The  Annual Meeting of Shareholders of Pentair, Inc. (the "Company") will be
held at the Northland Inn and Conference Center, 7101 Northland Circle, Brooklyn
Park, Minnesota, on Wednesday, April 24, 1996, at 10:00 a.m., for the  following
purposes:
 
    1.  To elect five directors.
 
    2.   To extend the 1990 Omnibus Stock Incentive Plan and increase the number
       of shares and incentive compensation units issuable thereunder.
 
    3.  To approve Amendments to the 1990 Omnibus Stock Incentive Plan to comply
       with Internal Revenue Code Section 162(m).
 
    4.  To  approve the adoption  of the Executive  Officer Performance Plan  to
       comply with Internal Revenue Code Section 162(m).
 
    5.   To vote on a proposal to  ratify the selection of Deloitte & Touche LLP
       as independent auditors of the Company for 1996.
 
    6.  To transact such other business as may properly come before the  meeting
       or any adjournment thereof.
 
    The  Board of Directors has fixed the close of business on February 26, 1996
as the record  date for  determining the shareholders  entitled to  vote at  the
annual  meeting.  Accordingly,  only  shareholders of  record  at  the  close of
business on that  date will be  entitled to vote.  The Company's transfer  books
will not be closed.
 
                                              By Order of the Board of Directors
 
                                                           R. T. Rueb, Secretary
 
Saint Paul, Minnesota
March 11, 1996
 
IMPORTANT:  To assure that the annual meeting may be legally held, there must be
a quorum (50% plus 1  vote). Accordingly, you are urged  to SIGN AND RETURN  THE
ENCLOSED  PROXY PROMPTLY. This will not prevent you from voting in person if you
so desire.
<PAGE>
                     TABLE OF CONTENTS FOR PROXY STATEMENT
 
<TABLE>
<CAPTION>
                                                                   PAGE
                                                                   ----
 
<S>                                                                <C>
Solicitation.....................................................    1
 
Revocation and Voting of Proxy...................................    1
 
Outstanding Shares and Voting Rights.............................    2
 
Security Ownership of Management and Beneficial Ownership........    2
 
Proposals to be Acted Upon at the Annual Meeting
 
  Item 1 -- Election of Directors................................    5
 
  Item 2 -- Extension of the 1990 Omnibus Stock Incentive Plan
            and Increase in Shares and Incentive Compensation
            Units Thereunder.....................................   11
 
  Item 3 -- Approval of Amendments to the 1990 Omnibus Stock
   Incentive Plan................................................   11
 
  Item 4 -- Approval of Executive Office Performance Plan........   13
 
  Item 5 -- Approval of Auditors.................................   14
 
Executive Compensation...........................................   14
 
Future Proposals.................................................   23
 
Other Business...................................................   23
</TABLE>
<PAGE>
- --------------------------------------------------------------------------------
 
                                PROXY STATEMENT
                       FOR ANNUAL MEETING OF SHAREHOLDERS
                           TO BE HELD APRIL 24, 1996
          ------------------------------------------------------------
 
                                 PENTAIR, INC.
                            1500 County Road B2 West
                          Saint Paul, Minnesota 55113
                                 March 11, 1996
 
    The  following statement is furnished in connection with the solicitation of
proxies by the Board of Directors of  Pentair, Inc. (the "Company") to be  voted
at  the annual meeting of  shareholders of the Company  to be held on Wednesday,
April 24,  1996,  or  at  any  adjournment  or  adjournments  of  such  meeting.
Distribution of this proxy statement and proxy to shareholders began on or about
March 11, 1996.
 
                                  SOLICITATION
 
    The cost of soliciting proxies and the notices of the meeting, including the
preparation,  assembly and mailing of proxies  and this statement, will be borne
by the Company. In addition to this mailing, proxies may be solicited personally
or by  telephone  by  regular  employees  of  the  Company.  Assistance  in  the
solicitation  of  proxies is  also being  rendered  by Morrow  & Co.,  909 Third
Avenue, New York, New York,  at a cost to the  Company of $9,000 plus  expenses.
Furthermore,   arrangements  may  be  made   with  brokers,  banks  and  similar
organizations to  send proxies  and  proxy materials  to beneficial  owners  for
voting instructions, for which the Company will reimburse such organizations for
their expense in so doing and will pay all costs of soliciting the proxies.
 
                         REVOCATION AND VOTING OF PROXY
 
    Any shareholder giving a proxy may revoke it prior to its use at the meeting
by (1) delivering a written notice expressly revoking the proxy to the Secretary
at  the Company's  offices, (2)  signing and  forwarding to  the Company  at its
offices a later dated proxy, or (3) attending the annual meeting and casting his
or her votes personally.
 
    A majority of the outstanding shares will constitute a quorum at the  Annual
Meeting.   Abstentions  and  broker  non-votes   are  counted  for  purposes  of
determining the presence or absence of a quorum for the transaction of business.
Pursuant  to  Minnesota  law  and  the  Company's  Articles  of   Incorporation,
abstentions  are counted in  determining the total  number of the  votes cast on
proposals presented to shareholders, but will  not be treated as votes in  favor
of  the proposals. Broker non-votes are  not counted for purposes of determining
the total number of votes cast on proposals presented to shareholders.
 
    Unless otherwise  directed  in the  accompanying  proxy, the  persons  named
therein  will vote FOR the directors and  the proposals set forth in this Notice
of Annual Meeting of Shareholders. As  to any other business which may  properly
come  before the meeting, they will vote in accordance with their best judgment.
The Company does not presently know of any other business.
 
                                       1
<PAGE>
                      OUTSTANDING SHARES AND VOTING RIGHTS
 
    THE BOARD OF DIRECTORS DECLARED A  100% STOCK DIVIDEND PAYABLE FEBRUARY  16,
1996 TO SHAREHOLDERS OF RECORD AT THE CLOSE OF BUSINESS ON FEBRUARY 2, 1996. ALL
SHARE DATA IN THIS PROXY STATEMENT REFLECTS THE 100% STOCK DIVIDEND.
 
    At  the close of business on February  26, 1996, the record date, there were
outstanding 37,394,754 shares of common stock, par value $.16 2/3 per share, and
1,706,394 shares of 8% Callable  Cumulative Voting Convertible Preferred  Stock,
Series  1990, par value $.10 per share  ("Voting Preferred"), which are the only
classes of voting stock of the Company entitled to be voted at the meeting.
 
    A shareholder  is entitled  to one  vote for  each common  share and  Voting
Preferred  share held on the record date with respect to all matters that may be
brought before the  meeting. There  is no  cumulative voting  for directors.  An
affirmative  vote of the holders of a majority of the voting power of the shares
present at the meeting is required for election of directors and the approval of
all other proposals set forth in this Proxy Statement.
 
                             SECTION 16 COMPLIANCE
 
    Section 16(a) of the Securities Exchange Act of 1934 requires the  Company's
directors  and  executive  officers to  file  with the  Securities  and Exchange
Commission initial reports of ownership and  reports of changes in ownership  of
common  stock and other  equity securities of  the Company. Officers, directors,
and greater than  ten-percent shareholders  are required by  SEC regulations  to
furnish the Company with copies of all Section 16(a) forms they file.
 
    Based  solely on  its review of  the copies  of such forms  furnished to the
Company and written representations from  the Company's officers and  directors,
the  Company believes all persons subject  to these reporting requirements filed
the required reports on a timely basis, except that D. Eugene Nugent, a director
of the Company  and Richard  J. Cathcart,  an officer  of the  Company, did  not
timely  file required Form 4, Statement  of Changes in Beneficial Ownership. The
required reports have now been filed by both persons.
 
           SECURITY OWNERSHIP OF MANAGEMENT AND BENEFICIAL OWNERSHIP
 
    The following table contains information concerning the beneficial ownership
of the Company's  voting shares as  of February  26, 1996 by  each director  and
nominee  for director,  by each  named executive  officer, by  all directors and
executive officers as a group, and as of December 31, 1995 by five persons known
to the Company to "beneficially  own" more than 5% of  either of its classes  of
voting shares.
 
<TABLE>
<CAPTION>
                             NUMBER OF                    NUMBER OF VOTING
                               COMMON        PERCENT OF      PREFERRED       PERCENT OF    COMBINED VOTING
  BENEFICIAL OWNER (A)       SHARES (B)        CLASS         SHARES (B)        CLASS       PERCENTAGE (C)
- -----------------------------------------------------------------------------------------------------------
<S>                       <C>               <C>           <C>               <C>           <C>
George N. Butzow                39,845(d)            *               0              0                *
Winslow H. Buxton              393,434(e)          1.0%          1,557              *              1.0%
Joseph R. Collins               87,315(f)            *           1,416              *                *
Charles A. Haggerty              7,995(g)            *               0              0                *
David D. Harrison               44,896(h)            *             228              *                *
Harold V. Haverty               10,500(i)            *               0              0                *
Quentin J. Hietpas              22,669(j)            *               0              0                *
Ronald V. Kelly                161,779(k)            *           1,583              *                *
Walter Kissling                  7,519(l)            *               0              0                *
Gerald C. Kitch                118,915(m)            *           1,525              *                *
Karen E. Welke                   1,233(n)            *               0              0                *
D. Eugene Nugent               819,576(o)          2.2%              0              0              2.1%
Richard M. Schulze               4,572(p)            *               0              0                *
</TABLE>
 
                                       2
<PAGE>
<TABLE>
<CAPTION>
                             NUMBER OF                    NUMBER OF VOTING
                               COMMON        PERCENT OF      PREFERRED       PERCENT OF    COMBINED VOTING
  BENEFICIAL OWNER (A)       SHARES (B)        CLASS         SHARES (B)        CLASS       PERCENTAGE (C)
- -----------------------------------------------------------------------------------------------------------
<S>                       <C>               <C>           <C>               <C>           <C>
All directors &              1,813,144(q)          4.8%          8,575              *              4.6%
executive officers as a
group (16 persons)
Brinson Partners, Inc.       2,362,172(r)          6.2%              0              0              5.9%
Three First National
Plaza
9th Floor, Suite 111
Chicago, IL 60602-4298
The Prudential Insurance     3,055,822(s)          8.0%              0              0              7.7%
 Company of America
Prudential Plaza
Newark, NJ 07102-3777
State Street Bank              156,600(t)            *       1,744,564(t)         100 %            4.4%
 and Trust Company
225 Franklin St.
Boston, MA 02110
Dietch & Field               3,228,900(u)          8.5%              0              0              8.1%
 Advisers, Inc.
437 Madison Avenue
New York, NY 10022
Capital Group                1,882,500(v)          5.0%              0              0              4.7%
 Companies, Inc.
333 South Hope Street
Los Angeles, CA 90071
</TABLE>
 
*   Less than 1.0%.
 
(a)  Unless otherwise noted, all shares  are held by individuals possessing sole
    voting and investment power with respect  to such shares. Amounts listed  do
    not  include 1,056,570  shares held  by the  Pentair, Inc.  Master Trust for
    various pension  plans  of  the  Company  and  it  subsidiaries.  The  Trust
    Investment  Committee of such Master Trust includes Winslow H. Buxton, David
    D. Harrison  and two  other officers.  Although these  individuals could  be
    deemed   under  applicable  Securities  and  Exchange  Commission  rules  to
    "beneficially own" all of  the shares held by  these plans because of  their
    shared  voting  and  investment power  with  respect to  those  shares, they
    disclaim beneficial ownership of such shares.
 
(b) The shares  of voting preferred  stock are all  held by the  trustee of  the
    Company's  Employee Stock Ownership  Trust. These shares  are converted into
    common shares upon the retirement or  other termination of employment of  an
    ESOP participant at the ratio of approximately 2.3077 common shares for each
    preferred share. The shares of preferred stock vote together with the common
    shares  as a single class  on most issues, with  each preferred share having
    one vote. As named fiduciaries  (i.e. the responsible parties identified  in
    the  voting section  of the  ESOP Trust  Agreement), the  ESOP participants,
    including those officers listed in the  table, have the right to direct  the
    Trustee   to  vote  the   shares  allocated  to   their  accounts,  although
    participants have no investment power  over those shares. In addition,  ESOP
    participants  have the right to direct the  Trustee to vote a portion of the
    shares that have not been allocated to participant accounts or for which  no
    instructions are timely received by the Trustee.
    Since  the  voting preferred  shares could  be converted  into approximately
    4,025,930 common shares, under applicable SEC rules the ESOP trustee may  be
    deemed  to beneficially own that number of  common shares in addition to the
    preferred shares it holds. However, to avoid overstatement of the  aggregate
    beneficial  ownership  of  the  common  and  voting  preferred  shares,  the
 
                                       3
<PAGE>
    common shares reported in the  table do not include  the shares that may  be
    acquired   upon  conversion  of   the  voting  preferred   shares,  and  the
    calculations of the percentage  of common shares  beneficially owned do  not
    take into account any such shares.
 
(c)  Since the  common shares  and voting  preferred shares  vote together  as a
    single class  on all  issues  being submitted  to  the shareholders  at  the
    upcoming  annual meeting, the  percentages listed in  the table indicate the
    percentage of the aggregate voting power  represented by the shares of  both
    classes held by each person listed.
 
(d)  Includes 9,000 shares that could be obtained upon exercise of stock options
    within 60 days and  18,053 shares representing Share  Units credited to  Mr.
    Butzow's  account in  the Third Amended  and Restated  Compensation Plan for
    Non-Employee Directors as to which he currently has no voting or  investment
    power.
 
(e) Includes 23,246 restricted shares issued pursuant to an incentive plan as to
    which  Mr. Buxton has sole voting power  but no investment power, 434 shares
    held jointly with  his spouse as  to which he  shares voting and  investment
    power,  12,024 held  by his  spouse as to  which he  may be  deemed to share
    voting and  investment  power,  but  as to  which  he  disclaims  beneficial
    ownership  and  252,000  shares  that could  be  obtained  upon  exercise of
    employee stock options within 60 days.
 
(f)  Includes 7,094 restricted shares issued pursuant to an incentive plan as to
    which Mr. Collins has sole voting power but no investment power, 793  shares
    held  by  his spouse  as  to which  he  may be  deemed  to share  voting and
    investment power, but  as to  which he disclaims  beneficial ownership,  and
    49,308 shares that could be obtained upon exercise of employee stock options
    within 60 days.
 
(g)  Includes 1,000 shares that could be obtained upon exercise of stock options
    within 60 days  and 2,995 shares  representing share units  credited to  Mr.
    Haggerty's  account in the Third Amended  and Restated Compensation Plan for
    Non-Employee Directors as to which he currently has no voting or  investment
    power.
 
(h)  Includes 7,380 restricted shares issued pursuant to an incentive plan as to
    which Mr. Harrison  has sole voting  power but no  investment power,  12,034
    shares  held  jointly with  his  spouse as  to  which he  shares  voting and
    investment power, and 23,066 shares that could be obtained upon exercise  of
    employee stock options within 60 days.
 
(i)  Includes 9,000 shares that could be obtained upon exercise of stock options
    within 60 days.
 
(j)   Includes 2,600  shares representing Share Units  credited to Mr. Hietpas's
    account in the Third Amended and Restated Compensation Plan for Non-Employee
    Directors as to which he currently has no voting or investment power.
 
(k) Includes 5,884 restricted shares issued pursuant to an incentive plan as  to
    which Mr. Kelly has sole voting power but no investment power, 24,554 shares
    held  by  his spouse  as  to which  he  may be  deemed  to share  voting and
    investment power, but  as to  which he disclaims  beneficial ownership,  and
    38,794 shares that could be obtained upon exercise of employee stock options
    within 60 days.
 
(l)  Includes 3,000 shares that could be obtained upon exercise of stock options
    within  60 days  and 4,519 shares  representing Share Units  credited to Mr.
    Kissling's account in the Third  Amended and Restated Compensation Plan  for
    Non-Employee Directors as to which he has no voting or investment power.
 
(m)  Includes 7,806 restricted shares issued pursuant to an incentive plan as to
    which Mr. Kitch has  sole voting power but  no investment power, and  62,482
    shares that could be obtained upon exercise of employee stock options within
    60 days.
 
(n)  Includes  1,233 shares  representing share  units  credited to  Ms. Welke's
    account in the Third Amended and Restated Compensation Plan for Non-Employee
    Directors as to which she has no voting or investment power.
 
                                       4
<PAGE>
(o) Includes 403,494 shares that Mr. Nugent holds jointly with his spouse as  to
    which  he  shares voting  and investment  power, 44,592  shares held  by his
    spouse as to which he  may be deemed to  share voting and investment  power,
    but  as to which  he disclaims beneficial ownership,  and 65,100 shares that
    could be obtained upon exercise of stock options within 60 days.
 
(p) Includes 1,000 shares that could be obtained upon exercise of stock  options
    within  60 days  and 1,572 shares  representing share units  credited to Mr.
    Schulze's account in the  Third Amended and  Restated Compensation Plan  for
    Non-Employee Directors as to which he has no voting or investment power.
 
(q)  Includes, with respect  to officers not  named above, 2,680  shares held by
    children of an  officer as  to which  such officer  may be  deemed to  share
    voting  and  investment  power,  but as  to  which  he  disclaims beneficial
    ownership; 3,520 shares  held jointly by  officers and their  spouses as  to
    which  such officers  share voting  and investment  power; 12,276 restricted
    shares issued pursuant to an incentive  plan as to which such officers  have
    sole  voting power but no investment power;  and 36,148 shares that could be
    obtained upon exercise of employee stock options within 60 days.
 
(r) According to  its Schedule  13G dated  February 9,  1996, Brinson  Partners,
    Inc.,  a registered  investment adviser,  has shared  voting power  and sole
    investment power over all 2,362,172 shares.
 
(s) According to its Schedule  13G dated February 12,  1996, as of December  31,
    1995,  Prudential  Insurance  Company of  America,  a  registered investment
    adviser and  broker-dealer,  has  sole  voting  and  investment  power  over
    1,176,600  shares  and shared  voting  and investment  power  over 1,879,222
    shares.
 
(t)  According to its Schedule 13G  dated February 12, 1996, as of December  31,
    1995,  State Street  Bank and Trust  Company, as trustee  under the Pentair,
    Inc. Employee Stock  Ownership Trust, may  be deemed to  have shared  voting
    power  and investment  power over  all voting  preferred shares,  but it has
    disclaimed beneficial ownership of all  shares. State Street reports  having
    sole  voting power  and investment power  over 149,400 of  the common shares
    listed, and shared investment  power of 7,200 of  the common shares  listed,
    which it holds as trustee for collective investment funds for other employee
    benefit plans.
 
(u)  According to its  Schedule 13G dated  January 12, 1996,  as of December 31,
    1995, Dietche & Field Advisers,  Inc., a registered investment advisor,  has
    sole voting power and investment power over all 3,228,900 shares.
 
(v)  According to its  Schedule 13G dated  February 9, 1996,  as of December 31,
    1995, the Capital Group Companies, a registered investment advisor, has sole
    voting and investment power over 1,590,220 shares and sole investment  power
    with no voting power with respect to 292,280 shares.
 
                PROPOSALS TO BE ACTED UPON AT THE ANNUAL MEETING
                                     ITEM 1
                             ELECTION OF DIRECTORS
 
    The  Company's By-Laws provide for a  Board of Directors (sometimes referred
to herein as  the "Board") of  not fewer than  three members and  not more  than
fifteen  members. The Board  recommends increasing the  number of directors from
nine to eleven. The Board is  divided into three classes with directors  serving
three-year terms but with the beginning date for each term staggered so that the
term  of only  one class  expires in any  particular year.  Vacancies that occur
during a term  may be  filled by  the Board  of Directors  or by  election at  a
special  meeting of shareholders. Any director elected  to fill a vacancy by the
remaining directors is  required to stand  for election at  the next meeting  of
shareholders.
 
    At  the forthcoming annual meeting, five persons are nominated to be elected
to the Company's Board  of Directors, three of  whom are currently directors  of
the Company. Three incumbent directors, George N. Butzow, Winslow H. Buxton, and
Walter  Kissling, and one  new director, Barbara B.  Grogan, have been nominated
for three-year terms, expiring at the 1999 Annual Meeting. In addition,  William
J.
 
                                       5
<PAGE>
Cadogan  has been  nominated for  a one-year  term expiring  at the  1997 Annual
Meeting. Six other directors  have terms of  office that do  not expire at  this
time,  and each will continue  to serve his or her  full term. Proxies cannot be
voted for a greater  number of directors than  the number nominated. Unless  you
direct  otherwise, proxies will be voted FOR the election of all nominees listed
below. Should any nominee decline or be  unable to accept such nomination or  to
serve  as director (an event  management does not now  expect to occur), proxies
will be voted FOR a substitute nominee  or nominees in accordance with the  best
judgment of the person or persons acting under them.
 
    Information  concerning the persons nominated  for election as directors, as
well as those continuing in office, is set forth on the following pages.
 
                        DIRECTORS STANDING FOR ELECTION
  (FOR A THREE-YEAR TERM EXPIRING AT THE 1999 ANNUAL MEETING OF SHAREHOLDERS)
 
<TABLE>
<S>                           <C>
[PHOTO]
GEORGE N. BUTZOW
 Director since: 1979
 Age: 66
                              Since May  1994,  Mr. Butzow  has  been Founder  and  Chairman Emeritus  of  MTS
                              Systems,  a  manufacturer of  high-technology  testing systems.  Mr.  Butzow was
                              Chairman of the Board of Directors of MTS  from 1982 to May 1994. Mr. Butzow  is
                              also a director of Andrew Corporation.
[PHOTO]
WINSLOW H. BUXTON
 Director since: 1990
 Age: 56
                              Since  January 1993, Mr. Buxton has been  the Chairman of the Board of Directors
                              of Pentair, Inc. Mr Buxton has been President and Chief Executive Officer of the
                              Company since August 1992. Mr. Buxton was Chief Operating Officer of the Company
                              from August 1990 through August 1992. Mr. Buxton was also Vice President - Paper
                              Group of the Company from January 1989 through August 1990. Mr. Buxton is also a
                              director of Bemis Company, Inc.
[PHOTO]
WALTER KISSLING
 Director since: 1993
 Age: 64
                              Mr. Kissling has been the President since April 1992 and Chief Executive Officer
                              since April  1995  of  H.B.  Fuller Company,  a  manufacturer  and  marketer  of
                              specialty  chemical products. He was Chief Operating Officer of H.B. Fuller from
                              July 1990 to April  1995 and Executive  Vice President from  July 1990 to  April
                              1991,  and  Senior Vice  President from  1980 to  1990. Mr.  Kissling is  also a
                              director of  H.B.  Fuller  Company and  Chairman  and  Director of  one  of  its
                              subsidiaries, Kativo Chemical Industries, S.A.
</TABLE>
 
                                       6
<PAGE>
 
<TABLE>
<S>                           <C>
[PHOTO]
BARBARA B. GROGAN
 Age: 48
                              Ms.  Grogan is Chairman and President of Western Industrial Contractors, Inc., a
                              company specializing in machinery erection and installation. Ms. Grogan  founded
                              Western Industrial Contractors, Inc. in September, 1982. She was Chairman of the
                              Board  of Directors of the  Federal Reserve Bank of  Kansas City, Denver Branch,
                              from 1989 to 1994, and at present is  a member of the Board of Directors of  the
                              U.S.  Chamber of  Commerce, the  Winter Park  Recreation Association  and Deluxe
                              Corporation.
</TABLE>
 
   (FOR A ONE-YEAR TERM EXPIRING AT THE 1997 ANNUAL MEETING OF SHAREHOLDERS)
 
<TABLE>
<S>                           <C>
[PHOTO]
WILLIAM J. CADOGAN
 Age: 47
                              Since November 1993, Mr. Cadogan has been the Chairman of the Board of Directors
                              of ADC Telecommunications,  Inc., a  designer and manufacturer  of products  and
                              systems  for broadband telecommunications  networks. Mr. Cadogan  has been Chief
                              Executive Officer  of  ADC  Telecommunications  since  November,  1991  and  was
                              President  from  June 1990  to November  1991. He  is also  a director  of Banta
                              Corporation.
</TABLE>
 
                         DIRECTORS CONTINUING IN OFFICE
           (TERM EXPIRES AT THE 1997 ANNUAL MEETING OF SHAREHOLDERS)
 
<TABLE>
<S>                           <C>
[PHOTO]
HAROLD V. HAVERTY
 Director since: 1990
 Age: 65
                              Since 1992, Mr. Haverty has  been Chairman of the  Board of Directors of  Deluxe
                              Corporation,  a manufacturer of bank checks and internal bank forms. Mr. Haverty
                              was the Chief Executive Officer and President of Deluxe from 1986 until 1995. He
                              also serves on the board of Minnesota Mutual Life.
[PHOTO]
CHARLES A. HAGGERTY
 Director since: 1994
 Age: 54
                              In June 1992, Mr. Haggerty was appointed President and subsequently in July 1993
                              appointed Chairman of  the Board  of Directors  and Chief  Executive Officer  of
                              Western  Digital Corporation, a manufacturer of hard disk drives. Prior to that,
                              he held various positions with IBM Corporation including Vice  President-General
                              Manager, Worldwide OEM Storage Marketing (1991-1992); and Vice President-General
                              Manager,  Low-end Storage Products (1989-1990). Mr.  Haggerty is also a director
                              of Sync Research, Inc. and Navistar International, Inc.
</TABLE>
 
                                       7
<PAGE>
 
<TABLE>
<S>                           <C>
[PHOTO]
D. EUGENE NUGENT
 Director since: 1975
 Age: 68
                              Mr. Nugent was the Chairman of the Board of Directors of Pentair, Inc. from July
                              1986 to January 1993.  He was also  the Chief Executive  Officer of the  Company
                              from  July  1986 until  August 1992.  Mr. Nugent  is also  a director  of Apogee
                              Enterprises, Inc. and UFE, Inc.
</TABLE>
 
           (TERM EXPIRES AT THE 1998 ANNUAL MEETING OF SHAREHOLDERS)
 
<TABLE>
<S>                           <C>
[PHOTO]
QUENTIN J. HIETPAS
 Director since: 1976
 Age: 65
                              Since 1983, Mr. Hietpas has been  the Senior Vice President of External  Affairs
                              of the University of St. Thomas.
[PHOTO]
RICHARD M. SCHULZE
 Director since: 1994
 Age: 55
                              Since  1983, Mr. Schulze has been  Founder, Chairman and Chief Executive Officer
                              of Best Buy Company, Inc. a consumer electronics and major appliance chain.
[PHOTO]
KAREN E. WELKE
 Director since: 1995
 Age: 51
                              Since February 1995, Ms.  Welke has been Group  Vice President, Medical  Markets
                              Group  for Minnesota Mining  and Manufacturing Company (3M).  Prior to that, she
                              held various positions with 3M including Managing Director, 3M France (July 1991
                              to February 1995); and Division Vice President, Medical-Surgical Division (March
                              1989 to July 1991).
</TABLE>
 
                                       8
<PAGE>
DIRECTORS' ATTENDANCE
 
    The Board of Directors held nine meetings in 1995. All directors attended at
least 75% of the meetings of the Board and its committees on which they served.
 
COMMITTEES OF THE BOARD
 
    The Audit Committee, which presently  consists of George N. Butzow  (Chair),
Richard  M. Schulze, Karen E. Welke and  Charles A. Haggerty, is responsible for
selecting  auditors,  ensuring  the  fiscal   integrity  of  the  Company,   and
establishing  and  reviewing internal  controls.  The Audit  Committee  held two
meetings in 1995.
 
    The Compensation  and  Personnel  Committee,  which  presently  consists  of
Quentin  J.  Hietpas  (Chair),  Harold  V.  Haverty  and  George  N.  Butzow, is
responsible for developing a broad plan of compensation for the Company that  is
competitive  and rewarding to the degree that it will attract, hold, and inspire
performance of executive,  managerial, and  other key  personnel. The  Committee
held six meetings during 1995.
 
    The  Nominating  Committee, which  presently  consists of  D.  Eugene Nugent
(Chair),  Winslow  H.  Buxton,  and  Quentin  J.  Hietpas,  is  responsible  for
nominating  candidates for vacancies on the Board. The Nominating Committee will
consider nominees recommended by shareholders under procedures set forth in  the
Company's  By-Laws. Sections 9 through  12 of Article II  of the By-Laws provide
that a candidate may not be nominated  for election as a director at the  annual
meeting  of shareholders unless  the nomination was  previously submitted to the
Board or its Nominating Committee. A shareholder wishing to nominate a candidate
for director at an annual meeting of  shareholders must do so no later than  the
sixtieth  day after the end of the fiscal  year preceding the year in which such
annual meeting will be held. Nominations  are deemed made when the Secretary  of
the Company receives all of the following: (1) all information about the nominee
that  may be  required to  be provided  in any  proxy statement  pursuant to the
Securities Exchange Act of 1934  and regulations promulgated thereunder; (2)  an
executed  directors' questionnaire provided by the  Company and completed by the
nominee; (3) the  nominee's statement consenting  to his or  her nomination  and
agreeing  to serve,  if elected;  and (4)  evidence that  the person  making the
nomination is a shareholder.  After reviewing the submission,  the Board or  the
appointed  Nominating Committee may, but need not,  designate one or more of the
nominees to  appear  as  an  alternate  candidate  on  any  proxy  solicited  by
management  or any proxy  statement furnished by management.  The number of such
alternate candidates may  not exceed the  number of directors  to be elected  at
that  annual meeting. Exclusion of any eligible candidate from a proxy solicited
by management does not affect the  right of shareholders to nominate, vote  for,
or  elect such candidate  at any shareholders meeting  held within twelve months
after submission  of the  nomination material  described above.  The  Nominating
Committee held three meetings in 1995.
 
DIRECTORS' REMUNERATION
 
    In  1996, non-employee directors will be paid an annual retainer of $23,000,
plus $1,000  for attendance  at  each Board  meeting. Committee  Chairs  receive
$1,400,  except  the Chair  of the  Compensation  Committee receives  $1,600 for
attendance at each committee meeting. Non-employee directors receive $1,000  for
attendance  at each committee meeting and  $500 for participation in a telephone
conference in lieu of a meeting.
 
    Under the  Third Amended  and Restated  Compensation Plan  for  Non-Employee
Directors,  directors who are  not employees of  the Company may  elect to defer
payment of all or a portion of  their director's fees. The amounts deferred  can
be  either  set aside  in  a cash  account  or used  to  purchase shares  of the
 
                                       9
<PAGE>
Company's common stock.  The plan provides  for a  Company match of  25% on  the
first  $750 per  month deferred  in the form  of common  stock. Participants and
amounts deferred under the Plan are shown below:
 
<TABLE>
<CAPTION>
             $ DEFERRED   $ DEFERRED   $ DEFERRED   SHARE UNITS
                1993         1994         1995        12/31/95
- ----------------------------------------------------------------
<S>          <C>          <C>          <C>          <C>
Butzow        $  26,200    $       0    $  44,650        17,631
Haggerty              0       22,688       39,050         2,749
Hietpas           9,000        9,000        9,000         2,532
Kissling         17,700       31,300       36,450         4,267
Schulze               0            0       33,750         1,333
Welke                 0            0       26,438           995
</TABLE>
 
    The plan also provides that  former non-employee directors who meet  certain
requirements  are to be considered for retirement  benefits to extend for a term
equal to the number of years  served as a non-employee director, which  benefits
shall  be paid monthly in  an amount equal to the  pro rata monthly retainer fee
being paid  to the  director at  the time  of termination  from the  Board.  The
Company  is currently  paying compensation  benefits to  three former directors.
Finally, in the event  of an unfriendly  change in control  of the Company,  the
plan  provides for  the establishment of  depository agreements  and the payment
into trust of funds sufficient to ensure the payment of any deferred  director's
fees or retirement benefits due former directors.
 
    The  Outside  Directors  Nonqualified  Stock Option  Plan  provides  for the
granting of options to purchase the Company's common stock to directors who  are
not  employees of the Company. The plan  provides for automatic annual grants to
the directors and  offers alternative  forms of  payment of  the exercise  price
including  surrender of Pentair common stock or unexercised options. The persons
to receive options, the number of options granted, and the terms of the  options
are  determined by  the Plan.  No option  granted under  the plan,  however, may
extend for a period  of more than ten  years from the date  of the grant and  no
option  exercise price  may be  less than  the current  market price  of Pentair
common stock on the date of award of such option.
 
<TABLE>
<CAPTION>
                                      OPTIONS    EXERCISE OR
         NAME              YEAR       GRANTED    BASE PRICE   EXPIRATION DATE
- -----------------------------------------------------------------------------
<S>                      <C>        <C>          <C>          <C>
George N. Butzow              1995       3,000    $ 21.50          1/18/00
                              1994       3,000    $ 17.75          1/19/99
                              1993       3,000    $ 14.33          1/19/98
 
Charles A. Haggerty           1995       3,000    $ 21.50          1/18/00
 
Harold V. Haverty             1995       3,000    $ 21.50          1/18/00
                              1994       3,000    $ 17.75          1/19/99
                              1993       3,000    $ 14.33          1/19/98
 
Quentin J. Hietpas            1995       3,000    $ 21.50          1/18/00
                              1994       3,000    $ 17.75          1/19/99
                              1993       3,000    $ 14.33          1/19/98
 
Walter Kissling               1995       3,000    $ 21.50          1/18/00
                              1994       3,000    $ 17.75          1/19/99
 
D. Eugene Nugent              1995       3,000    $ 21.50          1/18/00
                              1994       3,000    $ 17.75          1/19/99
                              1993       3,000    $ 14.33          1/19/98
 
Richard M. Schulze            1995       3,000    $ 21.50          1/18/00
</TABLE>
 
                                       10
<PAGE>
    One-third of the  options granted  to each recipient  become exercisable  on
each  of the  first three anniversaries  of the  date of grant,  and the options
expire five  years after  the date  of grant.  Two current  directors  exercised
options  during 1993-1995; the  net value of shares  (market value less exercise
price) realized from these exercises was $99,613.
 
                                     ITEM 2
               EXTENSION OF THE 1990 OMNIBUS STOCK INCENTIVE PLAN
                    AND INCREASE IN THE NUMBER OF SHARES AND
                     INCENTIVE COMPENSATION UNITS ISSUABLE
 
    The 1990 Omnibus Stock Incentive  Plan (the "Plan"), previously approved  by
shareholders  in 1990 for a ten-year period through January 11, 2000, allows for
the granting of nonqualified  stock options, incentive  stock options and  stock
appreciation  rights, restricted  stock, rights  to restricted  stock, incentive
compensation units, and performance shares and performance units.
 
    The Plan  is  administered  by  the  Company's  Compensation  and  Personnel
Committee  (the "Committee"), which is made up of members of the Company's Board
of Directors who are not employees of the Company and therefore not eligible  to
receive  awards under the  Plan. Employees eligible to  receive awards under the
Plan are those key managerial  administrative, or professional employees of  the
Company  or any  of its  affiliates who  are in  a position  to make  a material
contribution to the  continued profitable  growth and long-term  success of  the
Company.  The Committee  has the authority  to select the  recipients of awards,
determine the  type  and  size  of  the  awards,  establish  certain  terms  and
conditions  of award grants,  and take certain other  actions as permitted under
the Plan.
 
    The Committee continues to believe that  the success of the Company  depends
in  large  measure on  the  Company's ability  to  attract, retain  and motivate
executives and key employees,  and has concluded it  is desirable to extend  the
term of the Plan. The Committee has approved the extension of the Plan to expire
February 14, 2006, subject to shareholder approval.
 
    In  1990,  the shareholders  authorized 3,268,352  shares of  Company common
stock and 3,503,780 incentive compensation units ("ICUs") to be used for  awards
under the Plan (these numbers have been adjusted for stock dividends in 1993 and
1996).  The total number of shares  authorized in 1990 represented a combination
of remaining awards available under the Company's equity incentive plans then in
place. All shares of common stock originally authorized under the Plan have been
granted and all but 255,494 ICU's originally authorized under the Plan have been
awarded. The Committee approved a change to the Plan providing 3,200,000  shares
of  common stock  and 4,000,000  (an increase  of 3,744,506)  ICU's for issuance
under  the  Plan,  subject  to  shareholder  approval.  The  shares  and  awards
authorized  under the Plan are subject  to certain antidilution adjustments, and
if any awards under the Plan lapse, the number of shares or ICU's pertaining  to
such forfeited awards become available for subsequent grant under the Plan.
 
    The  Board of  Directors requests  shareholder approval  to extend  the plan
providing a 10-year term expiring February 14, 2006, and to increase the  number
of  shares issuable under  the Plan by  3,200,000 and to  increase the number of
incentive compensation units issuable under the Plan by 3,744,506.
 
THE BOARD OF DIRECTORS RECOMMENDS THAT SHAREHOLDERS VOTE "FOR" THE EXTENSION  OF
THE  1990 OMNIBUS STOCK INCENTIVE PLAN AND  THE INCREASE IN THE NUMBER OF SHARES
AND INCENTIVE COMPENSATION UNITS ISSUABLE THEREUNDER
 
                                     ITEM 3
        APPROVAL OF AMENDMENTS TO THE 1990 OMNIBUS STOCK INCENTIVE PLAN
              TO COMPLY WITH INTERNAL REVENUE CODE SECTION 162(M)
 
    Section 162(m)  of the  Internal  Revenue Code  of 1986  ("Section  162(m)")
imposes  an  annual  $1,000,000  limit on  the  Company's  deduction  of certain
compensation attributable to officers  whose compensation for  a fiscal year  is
disclosed   in  the  Summary   Compensation  Table  --  see   page  20  of  this
 
                                       11
<PAGE>
Proxy Statement. The limit does  not apply to performance-based compensation  as
defined  in  IRS  regulations.  In  general,  to  qualify  as  performance-based
compensation under these regulations  an employee's right to  and the amount  of
compensation  payable  (i)  must  depend  upon  satisfaction  of preestablished,
objective business criteria established by a compensation committee of the board
of directors, (ii) the plan or program under which such compensation is  payable
must  be administered  by a  compensation committee  made up  solely of "outside
directors" as  that term  is defined  under Section  162(m), (iii)  the plan  or
program  must be approved  by shareholders, and  (iv) the compensation committee
must certify satisfaction  of such  business criteria and  other material  terms
before   the  compensation   is  paid.   Under  IRS   regulations,  compensation
attributable  to  a  stock  option  or  stock  appreciation  right  ("SAR")   is
performance-based  compensation if (i) the grant  is made by such a compensation
committee, (ii) the plan  under which the  option or SAR  is granted limits  the
maximum  number of shares with  respect to which options  or SARS may be granted
during a specified  period to any  employee, and  (iii) under the  terms of  the
option  or SAR  the amount  of compensation which  an employee  could receive is
based solely on  an increase in  the value of  the stock after  the date of  the
grant.
 
    On  February  14,  1996,  the  Compensation  and  Personnel  Committee  (the
"Committee") approved  the  following  amendments  to  the  1990  Omnibus  Stock
Incentive  Plan (the "Plan"), subject to shareholders' approval, with the intent
that future grants under the Plan of stock options, SARs, incentive compensation
units ("ICUs"),  performance  shares  and  performance  units  will  qualify  as
performance-based compensation under Section 162(m).
 
    - Limit  to 150,000 the number of stock  options or SARs that can be awarded
      annually to any  one employee,  and require  that the  exercise price  for
      stock  options, and its equivalent for SARs,  cannot be less than the fair
      market value of the Company's common stock  on the date the option or  SAR
      is granted.
 
    - Establish  performance targets  for ICUs  granted after  February 14, 1996
      that are limited to objective tests such  as growth in the book value  per
      share  of the Company's common stock,  return on shareholders' equity, and
      earnings per  share growth.  Regardless of  the performance  standards  or
      targets established, however, the maximum compensation payable per ICU for
      an  incentive period will not  exceed 200% of the  increase in such common
      stock book value per share for that period.
 
    - Establish performance targets for performance shares and performance units
      granted in the future that are  limited to objective tests such as  return
      on  shareholders'  equity; earnings  per  share growth;  return  on sales;
      growth in income; growth in sales; and various techniques comparing actual
      returns with  required  returns based  on  cost of  capital  criteria.  In
      general,  the maximum amount  of compensation granted  to any one employee
      for a fiscal year under such  awards is $100,000, calculated based on  the
      fair  market value  of the  award on the  date of  grant. For participants
      covered by the Executive Officer Performance Plan, the maximum performance
      award payable in restricted stock is described in this Proxy Statement  on
      pages 13-14.
 
    The  Plan will  be administered by  the Committee, whose  members qualify as
"outside directors"  under Section  162(m).  In administering  the Plan  and  in
establishing  awards thereunder, the  Committee does not  have the discretion to
pay participants  more than  the award  amount indicated  by the  preestablished
goals  based on  the financial measurements  noted above. The  Committee has the
discretion and flexibility, however, based on its business judgement, to  reduce
this amount.
 
    Future  awards which may be made under the Plan are not determinable at this
time. Total awards  under the  Plan for  1995 for  all executive  officers as  a
group,  including  the Chief  Executive  Officer and  named  executive officers,
amounted to 234,900 incentive compensation units, 241,500 stock options,  33,422
restricted  shares  and  913  unrestricted  shares;  awards  to  other employees
amounted to 460,816 incentive compensation units, 186,218 stock options,  81,390
restricted  shares and 5,440 unrestricted shares.  Awards to the Chief Executive
Officer and named executive officers  under the Plan for  1995 are set forth  on
pages 20-22.
 
                                       12
<PAGE>
    The  Company is  advised by  counsel that  under current  interpretations of
Section 162(m), and subject to shareholder approval, future Plan awards of stock
options, SARs,  ICUs,  performance shares  and  performance units  will  not  be
subject  to the  $1,000,000 deduction limit  assuming compliance  with all other
aspects of Section 162(m). Due to possible unseen future events, however, it  is
impossible to be certain that all awards paid by the Company under the Plan will
be tax deductible.
 
    The  above amendments  are additions  to the Plan;  other than  as set forth
above, all other provisions of the Plan remain unchanged.
 
THE BOARD OF DIRECTORS RECOMMENDS  A VOTE "FOR" ITEM  3 TO APPROVE THE  PROPOSED
AMENDMENTS  TO THE  1990 OMNIBUS  STOCK INCENTIVE  PLAN TO  COMPLY WITH INTERNAL
REVENUE CODE SECTION 162(M)
 
                                     ITEM 4
       APPROVAL OF THE ADOPTION OF THE EXECUTIVE OFFICER PERFORMANCE PLAN
              TO COMPLY WITH INTERNAL REVENUE CODE SECTION 162(M)
 
    A bonus award paid to an executive under the Company's Management  Incentive
Plan  (the "MIP") is exempt from the  Section 162(m) deduction limitations if it
qualifies as "performance-based." Historically, executive officers have received
bonus awards under the MIP.  The MIP is discussed in  more detail on page 16  of
this  Proxy Statement.  MIP bonus  awards are  approved by  the Compensation and
Personnel Committee (the "Committee") based on an employee's position and  level
of responsibility (the bonus opportunity category), the financial performance of
the Company against preestablished goals (the company performance factor) and an
individual's  performance based  on attainment  of expectations  relative to job
function (the  individual performance  factor). Application  of this  individual
performance  factor  means a  MIP bonus  does  not qualify  as performance-based
compensation under IRS regulations.
 
    On  February  14,  1996,  the   Committee  adopted  the  Executive   Officer
Performance  Plan (the "Plan"), subject to shareholder approval, with the intent
that bonuses paid thereunder for fiscal year 1996 and thereafter will qualify as
performance-based compensation under Section 162(m).  The key provisions of  the
Plan, which is sought to be approved, are as follows:
 
    - The  Plan will include executive officers  to the extent they approach the
      Section 162(m)  deduction limit,  subject to  approval by  the  Committee.
      Participants  in  the  Plan  are  not  eligible  for  a  MIP  bonus award.
      Currently, the Chief  Executive Officer is  the only approved  participant
      under the Plan.
 
    - Awards  under the Plan will be determined based on the participant's bonus
      opportunity and the performance of the Company. The individual performance
      factor under the MIP does not apply under the Plan. The bonus  opportunity
      has  been  increased  to  adjust for  the  elimination  of  the individual
      performance factor.
 
    - The business  criteria to  determine the  company performance  factor  for
      fiscal  year 1996  and thereafter  is limited  to preestablished financial
      measurements such as earnings per share growth, return on invested capital
      and return on sales. The company performance factor is zero if the Company
      does not have positive operating income.
 
    - The maximum individual annual  bonus is 200%  of the participant's  annual
      base salary, but in no event more than $1,500,000.
 
    As with the MIP, the cash portion of a bonus award is limited to 100% of the
participant's  most recent annual base salary. Subject to the overall percentage
and dollar maximums described above, the bonus award for a year in excess of the
cash portion is  payable as a  performance share award  under the Omnibus  Stock
Incentive  Plan.  As a  performance share  award,  the participant  will receive
restricted shares of Company common stock, subject to any vesting condition  the
Committee may impose. The
 
                                       13
<PAGE>
formula to determine the number of restricted shares which may be awarded, up to
the  overall  percentage and  dollar  maximums, is  determined  in the  year the
performance goal is  established and  in accordance  with the  formula used  for
other restricted stock awards under the Omnibus Stock Incentive Plan.
 
    The  Plan will  be administered by  the Committee, whose  members qualify as
"outside directors"  under Section  162(m).  In administering  the Plan  and  in
establishing bonus awards thereunder, the Committee does not have the discretion
to  pay  participants  more  than  the  bonus  award  amount  indicated  by  the
preestablished goals. The Committee has the discretion and flexibility, however,
based upon its business judgement, to reduce this amount.
 
    The bonus award payable under the Plan for services performed in 1996 is not
currently determinable. Had the Plan been in effect for 1995, the bonus  awarded
to the CEO would equal the bonus described on page 17 of this Proxy Statement.
 
    The  Company is  advised by  counsel that  under current  interpretations of
Section 162(m), and subject to shareholder approval, Plan bonus awards will  not
be  subject to the $1,000,000 deduction limit assuming compliance with all other
aspects of Section 162(m). Due to possible unseen future events, however, it  is
impossible  to be certain  that all bonus  awards paid by  the Company under the
plan will be tax deductible.
 
    The Plan  is  essentially  the same  as  the  MIP described  in  this  Proxy
Statement on page 16, except for the differences described above.
 
THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" ITEM 4 TO APPROVE THE ADOPTION OF
THE  EXECUTIVE OFFICER  PERFORMANCE PLAN  TO COMPLY  WITH INTERNAL  REVENUE CODE
SECTION 162(M)
 
                                     ITEM 5
                              APPROVAL OF AUDITORS
 
    Deloitte & Touche  LLP, independent certified  public accountants have  been
the auditors for the Company since 1977. They have been retained by the Board of
Directors as the Company's auditors for the current fiscal year, and shareholder
approval of such retention is requested.
 
    Representatives  of Deloitte & Touche LLP  are expected to attend the Annual
Meeting with the opportunity  to make a  statement if they  so desire, and  they
will be available to respond to appropriate questions.
 
    The  Board  of Directors  recommends that  the  shareholders vote  "For" the
proposal to approve retention of Deloitte  & Touche LLP, and the enclosed  proxy
will be so voted unless a contrary vote or abstention is indicated. If retention
of  Deloitte &  Touche LLP  is not  approved by  the shareholders,  the Board of
Directors will make  another appointment effective  at the earliest  practicable
date.
 
THE  BOARD OF DIRECTORS RECOMMENDS  A VOTE "FOR" ITEM  5 TO APPROVE RETENTION OF
DELOITTE & TOUCHE LLP.
 
                             EXECUTIVE COMPENSATION
 
COMPENSATION AND PERSONNEL COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
    The Compensation  and Personnel  Committee  of the  Board of  Directors  was
comprised  of Quentin J. Hietpas (Chair), Harold V. Haverty and George N. Butzow
during 1995. None of the members of the Committee were officers or employees  of
the Company during 1995. There are no interlock relationships.
 
                                       14
<PAGE>
COMPENSATION AND PERSONNEL COMMITTEE REPORT ON EXECUTIVE COMPENSATION.
OVERVIEW
 
    The   Compensation  and  Personnel  Committee  of  the  Board  of  Directors
(the"Committee") is responsible  for supervising the  development of and  making
recommendations   to  the  Board   with  respect  to   the  Company's  executive
compensation policies. In addition,  the Committee makes annual  recommendations
to  the Board concerning compensation to be  paid to the Chief Executive Officer
and each of the other executive officers of the Company.
 
    The  Committee  also  oversees  all  aspects  of  the  Company's   executive
compensation  program, including many  of the Company's  employee benefit plans.
The Company currently maintains a variety  of compensation and benefit plans  in
which  its  executive  officers  may  participate  including  the  Omnibus Stock
Incentive Plan,  the Employee  Stock  Purchase and  Bonus Plan,  the  Retirement
Savings  and  Stock  Incentive  Plan (including  the  RSIP  Sidekick  Plan), the
Supplemental Executive Retirement Plan, and  the Management Incentive Plan.  The
Company also maintains a defined benefit pension plan in which substantially all
non-bargaining   employees,   including   the   Company's   executive  officers,
participate.
 
PENTAIR'S COMPENSATION PHILOSOPHY
 
    The principles guiding  the executive compensation  program are designed  to
ensure   a  proper  linkage  between  executive  compensation  and  creation  of
shareholder value. Goals of the program are:
 
    (a) to encourage innovation and growth;
 
    (b) to  reward  executives  for short-term  top  performance  and  long-term
       shareholder value;
 
    (c) to recognize outstanding performance;
 
    (d) to attract and retain top quality executives and key employees;
 
    (e) to encourage executive stock ownership; and
 
    (f)  to align management and shareholder interests.
 
    The Company has maintained the philosophy that compensation of the executive
officers should be directly and materially linked to operating results and stock
price  performance. To achieve  this, compensation is  heavily leveraged through
the annual bonuses  and long-term  equity incentives.  The mix  of base  salary,
bonuses  and other  benefits reflects  the Company's  goal of  providing average
compensation for average  performance and above  average compensation for  above
average performance.
 
    In  order  to make  its recommendations  to  the Board  concerning executive
officer compensation, the Committee annually reviews and evaluates the Company's
corporate performance and the compensation and equity ownership of its executive
officers. This is done by reviewing salary practices for comparable positions at
other major industrial organizations as disclosed in Towers Perrin  Compensation
database,  as well as a review of other nationally recognized pay surveys. These
major organizations  include  non-financial  manufacturing  companies  that  the
Corporation  competes  with  for  business  or  executive  talent.  Many  of the
companies which  are included  in the  Towers Perrin  Compensation database  and
national  pay  surveys are  also  listed in  the S&P  500  index and  the NASDAQ
Non-Financial Index included  in the  comparative Stock  Performance Graph.  The
Committee  has retained  Towers Perrin,  an independent  compensation consulting
firm, to assist in the review of executive compensation.
 
EXECUTIVE COMPENSATION PROGRAM
 
    The components of  the Company's executive  compensation program, which  are
subject  to the discretion of the Committee  on an individual basis, include (a)
base  salaries,  (b)  annual  cash  performance-based  bonuses,  (c)   long-term
performance-based   equity  incentives,  and   (d)  miscellaneous  other  fringe
benefits. All components are comparable to those of similar companies.
 
BASE SALARY
 
    In line with the Company's current policy with respect to the base  salaries
of  its  executive  officers,  the  CEO  submits  a  performance  appraisal  and
recommendation to the Committee with respect to
 
                                       15
<PAGE>
annual salaries  of  the  executive  officers.  The  Committee  then  discusses,
evaluates  and approves the salaries and  makes its recommendation to the Board.
Base salary targets for  executive positions are set  at the 50th percentile  of
competitive  compensation. An  individual performance  and experience  factor is
applied to the target midpoint to determine each executive's actual base salary,
within a range of +-20% of midpoint. A competent employee should attain midpoint
salary within 3  years by demonstrating  continuing development and  performance
consistent with his or her capabilities in the position.
 
    For  1995, the  salaries of the  named executive officers  identified in the
Summary Compensation Table are within the salary targets for each position.
 
BONUS
 
    Bonuses are considered for payment to executives and key employees following
the end of each year under the  Management Incentive Plan (MIP). MIP awards  are
determined  by  applying  the  following three  factors  to  base  salary: bonus
opportunity category,  company  performance factor  and  individual  performance
factor.
 
    Bonus  opportunity categories are  assigned to each  position at the Company
(55% for CEO and 40% for Executive Vice Presidents and Senior Vice Presidents).
 
    The company  performance  factor is  the  result of  the  multiplication  of
factors  for earnings per share (EPS)  growth, return on invested capital (ROIC)
and return on sales  (ROS). The use of  three multiplicative factors  reinforces
the  importance  of  balancing  financial oriented  goals  in  terms  of growth,
earnings quality  and  an  acceptable  return on  investment.  The  company  has
established  financial goals for EPS growth of 10%, ROIC of 15% and ROS of 8.5%.
Achievement of these financial goals results in a company performance factor  of
1.00.  The maximum  company performance factor  is 2.81 and  the minimum company
performance factor  is .32,  however, there  is no  MIP bonus  if the  Company's
operating  income is $0 or less.  Performance falling between the stated factors
is interpolated. For 1995, EPS growth from continuing operations was 20.0%, ROIC
was 19.3% and ROS was 8.3%, resulting in a company performance factor of 2.025.
 
    The individual  performance factor  is  determined by  the assignment  of  a
numerical factor based on a supervisor's judgement on attainment of expectations
relative  to the employee's function  (see page 17 for  discussion of CEO rating
process). The  CEO submits  a performance  appraisal and  recommendation to  the
Committee  for  executive officers  with respect  to the  individual performance
factor.
 
    Bonus awards  that exceed  an amount  equal to  base salary  are paid  as  a
performance  share award under the Omnibus Stock Incentive Plan. The performance
share award is paid  in restricted stock, subject  to any vesting condition  the
Committe  may impose. A  special award may  be granted at  the discretion of the
Committee to  any person  who  has made  an  extraordinary contribution  to  the
welfare,  reputation and earnings of the Company. The Committee approves all MIP
awards and retains the right to change  awards that are not in keeping with  the
objectives of the MIP plan.
 
LONG-TERM EQUITY INCENTIVES
 
    GRANTS
 
    Long-term  incentive  compensation  is  awarded in  the  form  of restricted
shares, incentive  compensation  units  (ICUs),  performance  shares  and  stock
options.  All awards  are proposed  by the  CEO and  approved by  the Committee.
Long-term incentives are determined  by using the average  of the 50th and  60th
percentile  of  comparable  grant practices  as  compiled by  the  Towers Perrin
compensation database. Awards to  senior executives are granted  in the form  of
ICUs  (30%) and  stock options  (70%). Restricted stock  may be  awarded to such
individuals as described in the  section entitled "stock ownership  guidelines";
as  an award to a  new executive officer; as the  form of payment of performance
shares; or in payment of the Management Incentive Plan bonus in excess of annual
base salary. The Committee is authorized to grant performance share awards  upon
attainment of certain performance
 
                                       16
<PAGE>
criteria   which  are   based  on   the  Company's   long-term  objectives.  The
Black-Scholes Model  is used  to  determine restricted  stock and  stock  option
grants. A comparable model is used for determining ICU grant values.
 
    The  total long-term compensation awards for 1995 for all executive officers
as a  group amounted  to 234,900  incentive compensation  units (ICUs),  241,500
stock  options, 913 unrestricted  shares, and 33,422  restricted shares of which
6,278  restricted  shares  were  awarded  for  achievement  of  stock  ownership
guidelines,  6,222 restricted shares were awarded  as payment for achievement of
certain performance criteria and 14,922 restricted shares were awarded under the
Management Incentive Plan.  All grants of  ICUs and stock  options were made  in
accordance  with the above formula. Grants  for the named executive officers are
shown in the Summary Compensation Table (page 20) and the Option/SAR grant table
(page 21).
 
    PAYOUTS
 
    Payouts on ICUs are based upon growth  in the Company's net book value  over
the life of the ICUs, as leveraged upward or downward depending on the Company's
return on equity and growth in earnings per share over that period.
 
    Payouts  in 1995, for named executive officers,  as shown in the LTIP Payout
column on the Summary Compensation Table (page 20), were for previously  awarded
ICU  grants and  were calculated  based on  the increase  in book  value and the
percentage attainment of earnings per share and return on equity goals since the
date of such grants.
 
COMPENSATION OF THE CHIEF EXECUTIVE OFFICER
 
    The base salary, annual  bonus and long-term equity  incentives paid to  Mr.
Buxton  are  generally determined  in accordance  with the  guidelines described
above, and  his  compensation is  comprised  of the  same  elements as  for  all
executive officers.
 
    The  Committee  has  a formal  rating  process for  evaluating  Mr. Buxton's
performance as the CEO. The rating process includes a self evaluation rating  by
the  CEO, after which each Board member  completes an evaluation and rating with
commentary. The Chairman of the Committee provides a consolidated rating  report
and  chairs a discussion  with the Board  members without the  CEO present. From
that discussion, the performance rating is finalized and the Committee  Chairman
is  instructed  to review  the  final rating  results  with the  CEO.  This then
translates into a personal development plan for the following year.
 
    In 1995, the Committee established a high individual performance factor  for
Mr.  Buxton based  on his  exceeding performance  objectives for  leadership and
Company financial  results which  included  growth in  earnings per  share  from
continuing  operations  of  20% and  return  on  invested capital  of  19.3%. In
addition, during  1995, the  Company sold  its paper  companies as  part of  its
strategy to become a diversified industrial company.
 
    The  base salary  market compensation  rate for a  CEO position  at the 50th
percentile was  $625,000 in  1995. Mr.  Buxton's base  salary was  increased  to
$585,000  in accordance with  the Committee's guideline of  a 3 year progression
toward market compensation. This  resulted in a 17.0%  increase in Mr.  Buxton's
base salary over 1994.
 
    Mr.  Buxton's bonus  was calculated using  the formula  described above. The
Committee used his base salary of $585,000, his BOC rate of 55% and applied  the
corporate  performance factor for  1995 and Mr.  Buxton's individual performance
factor to obtain his bonus amount of  $847,000. In accordance with the terms  of
the  Management Incentive Bonus Plan,  the bonus amount in  excess of one time's
base salary was paid in restricted stock which vests in equal increments on  the
third, fourth and fifth anniversaries of the grant.
 
    Mr.  Buxton's long-term incentive grants were  computed based on the average
of the 50th and 60th percentile  of the Towers Perrin Compensation database  for
comparable  grant practices. He was granted 81,100 ICUs and 83,600 stock options
in 1995.
 
                                       17
<PAGE>
STOCK OWNERSHIP GUIDELINES
 
    Stock ownership  guidelines  for top  management  have been  established  to
motivate  individual achievement and increase ownership of Pentair common stock.
The Committee determined that  over a period of  five years, its top  management
should  accumulate and hold  Company stock equal to  the following values: Chief
Executive Officer -- three to five times base salary; Senior Corporate  Officers
- --  two to three times base salary;  and other corporate officers and subsidiary
presidents -- one to two times base salary. In the opinion of the Committee, the
achievement of ownership levels  set forth will  result in executive  management
being  significant shareholders and will further encourage long-term performance
and Company growth.
 
    The Committee  will consider  making incentive  grants of  restricted  stock
based  on the increase in ownership  during the preceding year. These restricted
stock grants  (made under  the Omnibus  Plan) vest  in equal  increments on  the
third,  fourth, and fifth anniversaries  of the grant. The  size of the grant is
equal to 10% of the increase in common shares during the year, limited to 10% of
the targeted  ownership level  if the  targeted ownership  level per  the  stock
ownership guidelines has been achieved.
 
    In 1995, 6,278 restricted stock awards were granted under these guidelines.
 
COMPLIANCE WITH INTERNAL REVENUE CODE SECTION 162(M)
 
    Section  162(m) of  the Internal  Revenue Code,  enacted in  1993, generally
disallows a tax deduction to public  companies for compensation over $1  million
paid  to each of  the corporation's Chief  Executive Officer and  the four other
most highly compensated officers.  Qualifying performance-based compensation  is
not  subject  to  the  deduction  limit if  certain  requirements  are  met. The
Company's policy is to maximize  the deductibility of executive compensation  so
long  as the  deductibility is compatible  with the more  important objective of
maintaining  competitive   and  motivational   performance-based   compensation.
Therefore,  the  Board  of  Directors is  recommending  shareholder  approval of
performance-based  compensation  plans  for  executive  officers.  See  Item  3,
Approval  of Amendments to the 1990 Omnibus  Stock Incentive Plan to comply with
Internal Revenue  Code  Section 162(m)  and  Item  4, Approval  of  Adoption  of
Executive  Officer Performance Plan to comply with Internal Revenue Code Section
162(m).
 
Quentin J. Hietpas, Chair           Harold V. Haverty           George N. Butzow
 
             Compensation and Personnel Committee of Pentair, Inc.
 
                                       18
<PAGE>
                      COMPARATIVE STOCK PERFORMANCE GRAPH
 
    The following graph sets  forth the cumulative  total shareholder return  on
the  Company's  Common  Stock  for  the last  five  fiscal  years,  assuming the
investment of $100 on  December 31, 1990 and  the reinvestment of all  dividends
since  that date to  December 31, 1995.  The graph also  contains for comparison
purposes the S&P 500 Index and the NASDAQ Non-Financial Index. The Indices  were
prepared  by  the Center  for  Research in  Security  Prices (CRSP);  the NASDAQ
Non-Financial Index includes  SIC Codes 1  through 59, and  70 through 99.  Upon
request,  the Company  will undertake to  make accessible the  identity of those
companies making up the NASDAQ Non-Financial Index in a prompt manner. The  data
used was obtained from published sources and is believed to be accurate.
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
             S&P 500       PNR        NASDAQ NON-FINANCIALS
<S>         <C>         <C>        <C>
12/31/90         100.0      100.0                         100.0
12/31/91         130.7      167.2                         161.0
12/31/92         140.7      168.1                         176.0
12/31/93         154.4      214.9                         203.3
12/31/94         156.5      283.7                         194.9
12/31/95         215.4      336.0                         267.9
</TABLE>
 
                                       19
<PAGE>
SUMMARY COMPENSATION TABLE.
 
    The following table sets forth the cash and noncash compensation for each of
the  last three fiscal years awarded to or earned by the Chief Executive Officer
of the Company and the four highest paid executive officers of the Company whose
salary and bonus earned in 1995 exceeded $100,000.
 
<TABLE>
<CAPTION>
                                                               LONG-TERM COMPENSATION
                                                        -------------------------------------
 
                                                                  AWARDS
                                                        --------------------------   PAYOUTS
                            ANNUAL COMPENSATION         RESTRICTED    SECURITIES    ---------
                     ---------------------------------     STOCK      UNDERLYING      LTIP        ALL OTHER
NAME AND PRINCIPAL               SALARY     BONUS (A)   AWARDS (B)      OPTIONS      PAYOUTS    COMPENSATION
      POSITION         YEAR        ($)         ($)          ($)          /SARS       ($) (C)       ($) (D)
- --------------------------------------------------------------------------------------------------------------
<S>                  <C>        <C>        <C>          <C>          <C>            <C>        <C>
Winslow H. Buxton         1995  $ 585,000   $ 585,000    $ 375,326        83,600    $ 149,672     $  16,178
Chief Executive           1994    500,000     372,515       39,902        82,700      102,718        10,868
Officer                   1993    425,000     343,379            0        76,500       56,820        11,578
Gerald C. Kitch           1995  $ 263,217   $ 334,767    $  67,091        22,800    $  61,223     $  16,104
Executive Vice            1994    238,500     241,939       19,703        20,900       53,018        10,799
President                 1993    227,000     133,031            0        23,250       26,576        11,512
Joseph R. Collins         1995  $ 263,217   $ 263,217    $  71,572        22,800    $  29,107     $  18,102
Executive Vice            1994    238,500     134,934            0        20,900       21,181        12,808
President                 1993    210,000     138,045            0        23,250       23,233        12,770
David D. Harrison         1995  $ 262,500   $ 262,500    $  52,010        24,600    $   1,368     $  14,874
Executive Vice            1994    174,167      94,371      106,500        22,300          568        50,000
President, Chief
Financial Officer
Ronald V. Kelly           1995  $ 252,800   $ 252,800    $  42,406        22,800    $  61,223     $  18,488
Senior Vice               1994    238,500      98,103        7,668        20,900       53,018        13,176
President                 1993    227,000     122,807            0        23,250       26,576        13,855
</TABLE>
 
- ------------------------
(a)  Represents bonuses accrued by the Company  for the year even if paid  after
     December 31.
 
     The  bonus amount  for Mr.  Kitch includes $71,550  in 1995  and $71,550 in
     1994, which  amounts  were  awarded based  on  achievement  of  performance
     objectives  related to the integration of  Schroff, Inc. which was acquired
     by the Company in 1994. The 1995 Proxy Statement inadvertently excluded the
     1994 bonus.
 
(b)  The restricted share grants  reflected in the table  were made pursuant  to
     the  provisions discussed  under "stock ownership  guidelines," pursuant to
     performance share  award programs  which  support the  Company's  long-term
     growth  objectives, and for 1995,  amounts include restricted stock awarded
     in 1996 for compensation earned in  1995 pursuant to the provisions of  the
     Management  Incentive  Plan. The  restricted  stock awards  are  subject to
     vesting, in  three  equal  installments  on the  third,  fourth  and  fifth
     anniversaries of the grant, based solely on the continued employment of the
     recipient by the Company. The value of restricted stock awards reflected in
     the  table is based on the closing market  price of the common stock on the
     date of grant.
     As of December 31, 1995, the following restricted stock awards were held by
     each of the named executives (based on 12/31/95 closing price of  $24.875):
     Buxton  11,524 shares or $286,660; Kitch  6,636 shares or $165,071; Collins
     4,820 shares or $119,898; Harrison 3,574 shares or $88,903 and Kelly  4,848
     shares or $120,594.
 
(c)  Includes payouts for ICUs.
 
(d)  Includes   Company  contributions  to  the  Retirement  Savings  and  Stock
     Incentive Plan and match  contribution to the  Employee Stock Purchase  and
     Bonus  Plan. The  1994 amount  for Mr.  Harrison includes  a $50,000 hiring
     bonus.
 
OPTIONS AND STOCK APPRECIATION RIGHTS.
 
    The following tables summarize  option and SAR  grants and exercises  during
1995 to or by the Chief Executive Officer or one of the executive officers named
in the Summary Compensation Table above,
 
                                       20
<PAGE>
and  the values of the options and SARs held by such persons at the end of 1995.
No SARs have been granted  since 1983; grants shown  in the table below  include
both  incentive stock options and non-qualified stock options. No SARs have been
exercised or remain outstanding at the end of 1995.
 
<TABLE>
<CAPTION>
 
                                       OPTION AND SAR GRANTS IN 1995                      POTENTIAL REALIZABLE
                    --------------------------------------------------------------------    VALUE AT ASSUMED
                      NUMBER OF                                                           ANNUAL RATES OF STOCK
                     SECURITIES                                                            PRICE APPRECIATION
                     UNDERLYING    % OF TOTAL OPTIONS/ SARS                                  FOR OPTION TERM
                    OPTIONS/ SARS   GRANTED TO EMPLOYEES IN    EXERCISE OR   EXPIRATION   ---------------------
       NAME          GRANTED (A)          FISCAL 1995          BASE PRICE       DATE         5%         10%
- ---------------------------------------------------------------------------------------------------------------
<S>                 <C>            <C>                        <C>            <C>          <C>        <C>
Winslow H. Buxton        83,600                19.5%            $   21.50       1/18/00   $ 496,588  $1,097,331
Joseph R. Collins        22,800                 5.3%            $   21.50       1/18/00   $ 135,433  $  299,272
David D. Harrison        24,600                 5.8%            $   21.50       1/18/00   $ 146,125  $  322,899
Ronald V. Kelly          22,800                 5.3%            $   21.50       1/18/00   $ 135,433  $  299,272
Gerald C. Kitch          22,800                 5.3%            $   21.50       1/18/00   $ 135,433  $  299,272
</TABLE>
 
- ------------------------
(a)  One-third of each  grant becomes  exercisable on  each of  the first  three
     anniversaries of the date of grant, and the options expire five years after
     the  grant date. The exercise price for the options granted was the closing
     market price of the common stock as of the date of grant.
 
<TABLE>
<CAPTION>
              AGGREGATE OPTION AND SAR EXERCISES IN 1995 AND VALUE AT END OF 1995
- ------------------------------------------------------------------------------------------------
                                                              NUMBER OF
                                                              SECURITIES           VALUE OF
                                                              UNDERLYING         UNEXERCISED
                                                             UNEXERCISED         IN-THE-MONEY
                                                           OPTIONS/SARS AT     OPTIONS/SARS AT
                                                             END OF 1995         END OF 1995
                         SHARES ACQUIRED       VALUE       EXERCISABLE (E)     EXERCISABLE (E)
         NAME              ON EXERCISE       REALIZED     UNEXERCISABLE (U)   UNEXERCISABLE (U)
- ------------------------------------------------------------------------------------------------
<S>                     <C>                <C>            <C>                 <C>
Winslow H. Buxton              65,798      $   1,068,246      E  171,068        E  $1,814,470
                                                              U  164,234         U  $ 965,042
Joseph R. Collins               6,798      $      49,569      E   26,992         E  $ 271,960
                                                              U   44,484         U  $ 264,386
David D. Harrison                                             E    7,432         E  $  52,953
                                                              U   39,468         U  $ 188,960
Ronald V. Kelly                47,842      $     598,223      E   30,824         E  $ 387,218
                                                              U   44,484         U  $ 264,386
Gerald C. Kitch                10,800      $     184,500      E   40,166         E  $ 405,895
                                                              U   44,484         U  $ 264,386
</TABLE>
 
                                       21
<PAGE>
LONG-TERM INCENTIVE PLAN AWARDS.
 
    The following table reflects incentive  compensation unit awards made  under
the  Pentair, Inc. 1990  Omnibus Stock Incentive  Plan during 1995  to the Chief
Executive Officer and the executive  officers named in the Summary  Compensation
Table above.
 
<TABLE>
<CAPTION>
 
                         LONG-TERM INCENTIVE PLAN AWARDS IN 1995
- ------------------------------------------------------------------------------------------
                                                                ESTIMATED FUTURE PAYOUTS
                                             PERFORMANCE OR              UNDER
                        NUMBER OF SHARES,     OTHER PERIOD    NON-STOCK PRICE BASED PLANS
                          UNITS OR OTHER    UNTIL MATURATION  ----------------------------
         NAME                 RIGHTS           OR PAYOUT         THRESHOLD       TARGET
- ------------------------------------------------------------------------------------------
<S>                     <C>                 <C>               <C>              <C>
Winslow H. Buxton            81,100 units       3 years          $       0     $   435,345
Joseph R. Collins            22,100 units       3 years          $       0     $   118,633
David D. Harrison            23,900 units       3 years          $       0     $   128,295
Ronald V. Kelly              22,100 units       3 years          $       0     $   118,633
Gerald C. Kitch              22,100 units       3 years          $       0     $   118,633
</TABLE>
 
- ------------------------
The  ultimate payout value of  each unit is equal to  the increase in the common
stock book value per  share over the three-year  period, multiplied by a  factor
which is based on the Company's average annual percentage change in (a) Earnings
Per  Share (EPS)  and (b)  Return on  Equity (ROE)  over those  three years. The
threshold payout of $0  is reached if, over  the three-year period, the  average
annual  EPS growth is equal to or less than 0% and annual ROE growth is equal to
or less than 5%. The target payout shown in the table is based on the  Company's
objective of annual EPS growth of 10% and annual ROE growth of 15% which results
in a factor of 1.60. For every 1% change in the actual average annual EPS growth
and  ROE growth over the  three-year period, the factor  will change by .06 (.14
for ROE changes, if ROE growth is less than 10%).
 
DEFINED BENEFIT PENSION PLAN.
 
    The Company  maintains  a tax-qualified  defined  benefit pension  plan.  In
general,  the plan covers  non-bargaining employees of the  Company and its U.S.
subsidiaries. These  employees are  eligible to  participate in  the plan  after
attaining age 21 and completing one year of service.
 
    The following table sets forth the estimated normal retirement benefit based
on   specified  final   average  annual   compensation  and   years  of  service
classifications. Each  listed benefit  amount is  determined by  using a  Social
Security  covered compensation base of  $27,537. Currently, the Internal Revenue
Code limits the annual benefit from the plan to $120,000 and limits the pay used
to calculate pensions to $150,000, although  these limits are subject to  upward
adjustment in future years for cost of living increases.
 
<TABLE>
<CAPTION>
        ESTIMATED ANNUAL GROSS RETIREMENT BENEFITS UNDER CURRENT FORMULA
- --------------------------------------------------------------------------------
FINAL AVERAGE
    ANNUAL                              YEARS OF SERVICE
 COMPENSATION      10         15         20         25         30         35+
- --------------------------------------------------------------------------------
<S>             <C>        <C>        <C>        <C>        <C>        <C>
 $     50,000   $   6,123  $   9,185  $  12,246  $  15,308  $  18,369  $  21,431
      100,000      13,623     20,435     27,246     34,058     40,869     47,681
      150,000      21,123     31,685     42,246     52,808     63,369     73,931
</TABLE>
 
    For  purposes  of calculating  the  retirement benefit  for  named executive
officers under the plan, eligible compensation  consists of salary and bonus  as
listed  in the  Summary Compensation Table.  Current years of  service under the
plan for the named executive officers are: Buxton, 9; Collins, 24; Harrison,  2;
Kelly, 15; and Kitch, 7.
 
SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN.
 
    The  Company  has  established the  Supplemental  Executive  Retirement Plan
(SERP) to provide retirement benefits to  certain key executives of the  Company
and  its subsidiaries. The employees are eligible for nomination after attaining
age 50  and completing  five  years of  service.  The annual  normal  retirement
benefit  is 50% of the participant's final average annual compensation less 100%
of the participant's  annual primary  Social Security benefit.  This benefit  is
further  reduced  by  the  participant's benefits  under  the  Company's  or any
previous employer's  pension plans.  A participant  generally does  not earn  or
become  vested in a benefit under  the plan until he or  she attains age 60. The
plan has been extended to twenty employees, four of whom (Buxton, Collins, Kelly
and Kitch) are named executives. To
 
                                       22
<PAGE>
date, four retirees and one beneficiary  are receiving benefits under the  plan.
The  estimated annual benefits for the  named executive officers pursuant to the
SERP, assuming retirement at age 65,  are as follows: Buxton $333,000;  Collins;
$103,000; Kelly $125,000; and Kitch $141,000.
 
CHANGE IN CONTROL ARRANGEMENTS.
 
    Approximately  80 key corporate executives have entered into agreements with
the Company that  provide for contingent  benefits if the  executive leaves  the
employ  of the Company  within one year  after an unfriendly  change in control.
Such benefits include:
 
    a.  bonus awards for  the year in question to  be made under the  Management
       Incentive Plan;
 
    b.   termination of all restrictions on shares issued under the 1990 Omnibus
       Stock Incentive Plan,  and payment for  Incentive Compensation Units  and
       Performance Units without regard to the plans' forfeiture provisions;
 
    c.   reimbursement of income taxes  incurred in connection with the exercise
       of  certain  nonqualified  options,  as   well  as  termination  of   all
       restrictions  on transfer and termination of  any right of the Company to
       repurchase shares received upon exercise of such options;
 
    d.  the cost of an executive search agency;
 
    e.  directors and officers liability insurance coverage;
 
    f.   short-term replacement  coverage  for Company-provided  group  medical,
       dental, and life insurance policies;
 
    g.   amount of non-vested benefits  under any of the Company's tax-qualified
       deferred compensation plans;
 
    h.  the accelerated accrual and  vesting of benefits under the  Supplemental
       Executive  Retirement  Plan  (for  those executives  who  have  been made
       participants of such plan); and
 
    i.   severance pay  equal to 300% of  annual compensation or, for  employees
       other  than executive officers of the Company, such amount reduced to the
       extent necessary to avoid federal excise taxes under Section 280G of  the
       Internal Revenue Code.
 
    In  addition, the 1990 Omnibus Stock Incentive Plan permits the Compensation
and Personnel Committee, upon a change in control of the Company, to cancel  all
outstanding  options granted  under the  plan, whether  or not  exercisable, and
authorize payment of the "spread" between the exercise price of the options  and
the then current market value of the underlying stock.
 
    Based  upon compensation levels as of December 31, 1995, the dollar value of
the benefits payable upon an unfriendly change in control to the named executive
officers in the Summary Compensation Table  by virtue of the agreements and  the
1990  Omnibus Plan provision  discussed above (excluding  amounts that otherwise
would be payable upon  a termination of employment  not involving an  unfriendly
change  in control)  would be:  Buxton, $6,544,000;  Collins, $2,266,000; Kelly,
$2,585,000; Kitch, $2,684,000 and Harrison, $1,935,000.
 
                                FUTURE PROPOSALS
 
    Any proposal  that a  shareholder  intends to  present  at the  1997  annual
meeting  must be  received by the  Company no  later than November  11, 1996 for
inclusion in the  1997 notice of  annual meeting, proxy  statement, and form  of
proxy.
 
                                 OTHER BUSINESS
 
    Management  does not know of  any other business that  will be presented for
consideration at the meeting; however, if any other business does properly  come
before  the meeting, proxies will be voted  in accordance with the best judgment
of the person or persons acting under them.
 
                                       23
<PAGE>
                                 PENTAIR, INC.
            PROXY FOR ANNUAL MEETING OF SHAREHOLDERS APRIL 24, 1996
        PLEASE SIGN AND RETURN PROMPTLY TO REDUCE SOLICITATION EXPENSES
 
        The undersigned hereby appoints Winslow H. Buxton and David D. Harrison,
or  either of them, as  Proxies, each with the  power to appoint his substitute,
and hereby authorizes them  to represent and to  vote, as designated below,  all
the shares of common stock of Pentair, Inc. held of record by the undersigned on
February  26, 1996 at the Annual Meeting  of Shareholders of Pentair, Inc. to be
held at  10:00  a.m.,  Wednesday, April  24,  1996,  at the  Northland  Inn  and
Conference  Center,  7101 Northland  Circle, Brooklyn  Park, Minnesota,  and any
adjournment or adjournments thereof.
 
        Furthermore, as an ESOP  participant I hereby  direct State Street  Bank
and  Trust  Company,  as  ESOP  Trustee,  to  vote  at  the  Annual  Meeting  of
Shareholders of Pentair,  Inc. to be  held at 10:00  a.m., Wednesday, April  24,
1996,  at  the  Northland  Inn and  Conference  Center,  7101  Northland Circle,
Brooklyn Park,  Minnesota,  and any  adjournment  or adjournments  thereof,  all
shares  of voting preferred stock of Pentair,  Inc. allocated as of February 26,
1996 to my account in the  Pentair, Inc. Retirement Savings and Stock  Incentive
Plan,  plus a  pro rata portion  of the shares  that have not  been allocated to
participant accounts or for  which no instructions  are received, as  designated
below.  I understand that this card must  be received by Norwest Bank Minnesota,
N.A., acting as tabulation agent for the ESOP Trustee, by April 17, 1996. If  it
is  not received by that date, or if the voting instructions are invalid because
this form is not properly signed and  dated, the shares held in my account  will
be  voted by State Street Bank and Trust Company in the same proportion that the
other participants in the plan direct the ESOP Trustee to vote shares  allocated
to their accounts.
 
<TABLE>
<S>     <C>                                         <C>             <C>             <C>
I.      ELECTION OF DIRECTORS
        /  /    FOR electing  George  N. Butzow,    / /  WITHHOLD  AUTHORITY to vote for  George
        Winslow   H.  Buxton,  Walter  Kissling,    N.  Butzow,   Winslow  H.   Buxton,   Walter
        Barbara   B.  Grogan,   and  William  J.    Kissling, Barbara B. Grogan, and William  J.
        Cadogan   (except   as  marked   to  the    Cadogan.
        contrary below).
        (INSTRUCTION: To  withhold authority  to vote  for any  individual nominee,  write  that
        nominee's name in the space provided below.)
 
        ----------------------------------------------------------------------------------------
 
II.     To  extend the term  of the 1990 Omnibus    / / FOR         / / AGAINST      / / ABSTAIN
        Stock Incentive  Plan and  increase  the
        number    of   shares    and   incentive
        compensation units issuable thereunder.
III.    To  approve  Amendments   to  the   1990    / / FOR         / / AGAINST      / / ABSTAIN
        Omnibus  Stock Incentive  Plan to comply
        with  Internal   Revenue  Code   Section
        162(m).
IV.     To approve the adoption of the Executive    / / FOR         / / AGAINST      / / ABSTAIN
        Officer  Performance Plan to comply with
        Internal Revenue Code Section 162(m).
V.      PROPOSAL  TO  RATIFY  the  retention  of    / / FOR         / / AGAINST      / / ABSTAIN
        Deloitte  &  Touche  LLP  as independent
        public  accountants   for  the   current
        fiscal year.
VI.     To  transact such other  business as may
        properly come before the meeting or  any
        adjournment thereof.
</TABLE>
 
If  any  other business  is  brought before  the  Meeting or  any adjournment(s)
thereof, this Proxy will be voted in the discretion of the Appointed Proxies.
 
                THE BOARD RECOMMENDS A VOTE "FOR" EACH PROPOSAL.
<PAGE>
                                 PENTAIR, INC.
                                 ANNUAL MEETING
 
                      Northland Inn and Conference Center
                             7101 Northland Circle
                            Brooklyn Park, Minnesota
 
                                 APRIL 24, 1996
                  10:00 A.M., WEDNESDAY, CENTRAL STANDARD TIME
 
                                     [LOGO]
 
THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF PENTAIR, INC. THE
SHARES  REPRESENTED HEREBY WILL BE VOTED AS  DIRECTED BY THIS PROXY, BUT IF THIS
PROXY IS RETURNED SIGNED WITH NO DIRECTION  MADE, THEY WILL BE VOTED "FOR"  EACH
OF THE DIRECTORS AND PROPOSALS.
 
          The  undersigned  hereby ratifies  and confirms  all that  the Proxies
shall lawfully do or cause  to be done by virtue  hereof and hereby revokes  all
proxies heretofore given to vote such shares.
                               Dated: __________________________________________
                               _________________________________________________
                                                  (Signature)
                               _________________________________________________
                                                  (Signature)
 
                               (Please  sign exactly as your name appears to the
                               left. When shares are held by joint tenants, both
                               should   sign.   When   signing   as    executor,
                               administrator,  attorney,  trustee  or  guardian,
                               please give full title as such. If a corporation,
                               please sign in full  corporate name by  president
                               or  other authorized  officer. If  a partnership,
                               please sign in partnership name by an  authorized
                               person.)
 
                                   PLEASE COMPLETE, DATE, SIGN AND MAIL THIS
                                  PROXY IN THE ENCLOSED POSTAGE PAID ENVELOPE
<PAGE>
 
<TABLE>
<S>                           <C>                         <C>
      PLEASE SIGN AND         PENTAIR, INC. -- PREFERRED     PROXY FOR ANNUAL
     RETURN PROMPTLY TO                                         MEETING OF
REDUCE SOLICITATION EXPENSES                                   SHAREHOLDERS
                                                              APRIL 24, 1996
</TABLE>
 
    The  undersigned hereby appoints Winslow H. Buxton and David D. Harrison, or
either of them, as Proxies, each with  the power to appoint his substitute,  and
hereby  authorizes them to represent  and to vote, as  designated below, all the
shares of preferred stock of Pentair, Inc. held of record by the undersigned  on
February  26, 1996 at the Annual Meeting  of Shareholders of Pentair, Inc. to be
held at  10:00  a.m.,  Wednesday, April  24,  1996,  at the  Northland  Inn  and
Conference  Center,  7101 Northland  Circle, Brooklyn  Park, Minnesota,  and any
adjournment or adjournments thereof.
 
    THE BOARD RECOMMENDS A VOTE "FOR" EACH PROPOSAL.
 
<TABLE>
<S>                                       <C>
1. ELECTION OF DIRECTORS: FOR all         WITHHOLD AUTHORITY to vote for ALL
nominees listed below / /                 nominees listed below. / /
  EXCEPT THOSE I HAVE STRUCK BY A LINE
THROUGH their names.
</TABLE>
 
  George N. Butzow              Winslow H. Buxton              Walter Kissling
               Barbara B. Grogan              William J. Cadogan
 
    2. To extend the term of the 1990 Omnibus Stock Incentive Plan and  increase
       the   number  of   shares  and  incentive   compensation  units  issuable
       thereunder.
 
             / / FOR             / / AGAINST             / / ABSTAIN
 
    3. To approve Amendments to the 1990 Omnibus Stock Incentive Plan to  comply
       with Internal Revenue Code Section 162(m).
 
             / / FOR             / / AGAINST             / / ABSTAIN
<PAGE>
    4. To  approve the  adoption of  the Executive  Officer Performance  Plan to
       comply with Internal Revenue Code Section 162(m).
 
             / / FOR             / / AGAINST             / / ABSTAIN
 
    5. PROPOSAL TO RATIFY the retention of Deloitte & Touche LLP as  independent
       public accountants for the current fiscal year.
 
             / / FOR             / / AGAINST             / / ABSTAIN
 
    6. To  transact such other business as  may properly come before the meeting
       or any adjournment thereof.
 
    THE SHARES REPRESENTED HEREBY WILL BE  VOTED AS DIRECTED BY THIS PROXY,  BUT
IF  THIS PROXY IS RETURNED WITH NO DIRECTION MADE, THEY WILL BE VOTED "FOR" EACH
OF THE DIRECTORS AND PROPOSALS.
 
                                           The undersigned  hereby ratifies  and
                                           confirms  all that  the Proxies shall
                                           lawfully do or  cause to  be done  by
                                           virtue  hereof and hereby revokes all
                                           proxies heretofore given to vote such
                                           shares.
 
                                           THIS PROXY IS SOLICITED ON BEHALF  OF
                                           THE  BOARD  OF DIRECTORS  OF PENTAIR,
                                           INC.
                                           _____________________________________
                                                         Signature
                                           _____________________________________
                                                 Signature if held jointly
                                           Dated: ________________________, 1996
                                                 THIS CARD MUST BE DATED.
                                           (Please sign  exactly  as  your  name
                                           appears  to the left. When shares are
                                           held by  joint tenants,  both  should
                                           sign.   When  signing   as  executor,
                                           administrator, attorney,  trustee  or
                                           guardian,  please give  full title as
                                           such. If a  corporation, please  sign
                                           in  full corporate  name by president
                                           or other  authorized  officer.  If  a
                                           partnership, please sign in
                                           partnership  name  by  an  authorized
                                           person.)
<PAGE>
                                 PENTAIR, INC.
            PROXY FOR ANNUAL MEETING OF SHAREHOLDERS, APRIL 24, 1996
        PLEASE SIGN AND RETURN PROMPTLY TO REDUCE SOLICITATION EXPENSES
 
      The  undersigned hereby appoints Winslow H.  Buxton and David D. Harrison,
or either of them, as  Proxies, each with the  power to appoint his  substitute,
and  hereby authorizes them to  represent and to vote,  as designated below, all
the shares of common stock of Pentair, Inc. held of record by the undersigned on
February 26, 1996 at the Annual Meeting  of Shareholders of Pentair, Inc. to  be
held  at  10:00  a.m., Wednesday,  April  24,  1996, at  the  Northland  Inn and
Conference Center,  7101 Northland  Circle, Brooklyn  Park, Minnesota,  and  any
adjournment or adjournments thereof.
 
<TABLE>
<S>   <C>                                      <C>      <C>          <C>
I.    ELECTION OF DIRECTORS
 
                                               /  /  WITHHOLD  AUTHORITY to vote
      / /   FOR  electing George  N.  Butzow,  for  George N. Butzow, Winslow H.
      Winslow  H.  Buxton,  Walter  Kissling,  Buxton,  Walter Kissling, Barbara
      Barbara  B.  Grogan,  and  William   J.  B.   Grogan,   and   William   J.
      Cadogan  (except  as   marked  to   the
      contrary below).                         Cadogan.
 
      (INSTRUCTION:  To withhold authority  to vote for  any individual nominee,
      write that nominee's name in the space provided below.)
 
      --------------------------------------------------------------------------
 
II.   To extend the term of the 1990  Omnibus  / / FOR  / / AGAINST  / / ABSTAIN
      Stock  Incentive Plan  and increase the
      number   of   shares   and    incentive
      compensation units issuable thereunder.
 
III.  To   approve  Amendments  to  the  1990  / / FOR  / / AGAINST  / / ABSTAIN
      Omnibus Stock Incentive Plan to  comply
      with   Internal  Revenue  Code  Section
      162(m).
 
IV.   To  approve   the   adoption   of   the  / / FOR  / / AGAINST  / / ABSTAIN
      Executive  Officer Performance  Plan to
      comply  with   Internal  Revenue   Code
      Section 162(m).
 
V.    PROPOSAL  TO  RATIFY  the  retention of  / / FOR  / / AGAINST  / / ABSTAIN
      Deloitte &  Touche LLP  as  independent
      public   accountants  for  the  current
      fiscal year.
 
VI.   To transact such other business as  may
      properly come before the meeting or any
      adjournment thereof.
</TABLE>
 
If  any  other business  is  brought before  the  Meeting or  any adjournment(s)
thereof, this Proxy will be voted in the discretion of the Appointed Proxies.
                THE BOARD RECOMMENDS A VOTE "FOR" EACH PROPOSAL.
<PAGE>
                                     [LOGO]
 
THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF PENTAIR, INC. THE
SHARES REPRESENTED HEREBY WILL BE VOTED AS  DIRECTED BY THIS PROXY, BUT IF  THIS
PROXY  IS RETURNED SIGNED WITH NO DIRECTION  MADE, THEY WILL BE VOTED "FOR" EACH
OF THE DIRECTORS AND PROPOSALS.
 
          The undersigned  hereby ratifies  and confirms  all that  the  Proxies
shall  lawfully do or cause  to be done by virtue  hereof and hereby revokes all
proxies heretofore given to vote such shares.
                               Dated: __________________________________________
                               _________________________________________________
                                                  (Signature)
                               _________________________________________________
                                                  (Signature)
 
                               Please sign exactly as  your name appears to  the
                               left. When shares are held by joint tenants, both
                               should    sign.   When   signing   as   executor,
                               administrator,  attorney,  trustee  or  guardian,
                               please give full title as such. If a corporation,
                               please  sign in full  corporate name by president
                               or other  authorized officer.  If a  partnership,
                               please  sign in partnership name by an authorized
                               person.
 
                                   PLEASE COMPLETE, DATE, SIGN AND MAIL THIS
                                  PROXY IN THE ENCLOSED POSTAGE PAID ENVELOPE


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