Exhibit 3.1

                    SECOND RESTATED ARTICLES OF INCORPORATION
                                OF PENTAIR, INC.

                Compiled Version As Amended Through May 1, 2002.


                                   ARTICLE I.

     The name of this Corporation shall be PENTAIR, INC.

                                   ARTICLE II.

     The duration of this Corporation shall be perpetual.

                                  ARTICLE III.

     Section 1. This Corporation has general business purposes.

     Section 2. In amplification but not in limitation of the provisions and
legal effect of Section 1 hereof or of any other provision in these Articles,
and in amplification but not in limitation of the purposes, powers and authority
this Corporation would have in the absence from these Articles of this Section 2
hereof, the nature of the business, or objects or purposes to be transacted,
promoted or carried on are: to manufacture, purchase or otherwise dispose of,
and to deal generally in and with paper and paper products and related products,
of every type and description; to manufacture, purchase or otherwise acquire,
invest in, own, mortgage, sell, assign and transfer, or otherwise dispose of,
trade, deal in and deal with goods, wares and merchandise and personal property
of every class and description; to carry on any other business in connection
with any one or more of the foregoing purposes; and to do any and all acts and
things necessary or convenient to accomplish or implement any one or more of the
foregoing purposes.

                                   ARTICLE IV.

     This Corporation shall have all the powers granted to private corporations
organized for profit by said Minnesota Business Corporation Act and, in
furtherance, and not in limitation, of the powers conferred by the laws of the
State of Minnesota upon corporations organized for the foregoing purposes, the
Corporation shall have the power:

     (a)  To issue bonds, debentures or other obligations of the Corporation,
          and to contract indebtedness without limit as to amount for any of the
          objects and purposes of the Corporation, and to secure the same by
          mortgage or mortgages, deed or deeds of trust, or pledge, or lien, or
          any or all of the real or personal property, or both, of the
          Corporation.

     (b)  To acquire, hold, mortgage, pledge or dispose of the shares, bonds,
          securities or other evidences of indebtedness of the United States of
          America or of any domestic or foreign corporation, and while the
          holder of such shares, to exercise all the privileges of ownership,
          including the right to vote thereon, to the same extend as a natural
          person might or could do, by the president of this Corporation or by
          proxy appointed by him, unless some other person, by resolution of the
          Board of Directors, shall be appointed to



          vote such shares.

     (c)  To purchase or otherwise acquire on such terms and in such manner as
          the By-Laws of this Corporation from time to time provide, and to own
          and hold, shares of the capital stock of this Corporation, and to
          reissue the same from time to time.

     (d)  When and as authorized by the vote of the holders of not less than a
          majority of the shares entitled to vote, at a shareholders' meeting
          called for that purpose or when authorized upon the written consent of
          the holders of a majority of such shares, to sell, lease, exchange, or
          otherwise dispose of all, or substantially all, of its property and
          assets, including its good will, upon such terms and for such
          considerations, which may be money, shares, bonds, or other
          instruments for the payment of money or other property, as the Board
          of Directors deems expedient or advisable.

     (e)  To acquire, hold, lease, encumber, convey or otherwise dispose of,
          either alone or in conjunction with others, real and personal property
          within or without the state; and to take real and personal property by
          will or gift.

     (f)  To acquire, hold, take over as a going concern and thereafter to carry
          on, mortgage, sell or otherwise dispose of, either alone or in
          conjunction with others, the rights, property and business of any
          person, entity, partnership, association, or corporation heretofore or
          hereafter engaged in any business, the purpose of which is similar to
          the purposes set forth in Article III of these Articles of
          Incorporation.

     (g)  To enter into any lawful arrangement for sharing of profits, union of
          interest, reciprocal association, or cooperative association with any
          corporation, association, partnership, individual, or other legal
          entity, for the carrying on of any business, the purpose of which is
          similar to the purposes set forth in Article III of these Articles of
          Incorporation, and, insofar as it is lawful, to enter into any general
          or limited partnership, the purpose of which is similar to such
          purposes.

                                   ARTICLE V.

     An agreement for consolidation or merger with one or more foreign or
domestic corporations may be authorized by vote of the shareholders entitled to
exercise at least two-thirds of the shares entitled to vote unless the necessary
affirmative vote to authorize any particular merger or consolidation is reduced
by the Board of Directors, which reduction shall be to not less than a majority
of the shares entitled to vote.

                                   ARTICLE VI.

     The location and post office address of the registered office of this
Corporation shall be 1500 County Road B2 West, St. Paul, Minnesota.

                                  ARTICLE VII.

     The aggregate number of shares which this Corporation shall have authority
to issue is 250,000,000 shares, of which not more than 15,000,000 shares shall
be "Preferred Shares."

     a.   All classes of Preferred and Common shares may be issued as and when
          and for such consideration as the Board of Directors shall determine,
          and, to the full extent permitted by the Minnesota Business
          Corporation Act, the Board of Directors shall have the power to
          establish any classes or series of Preferred Shares or Common Shares,
          with such par value, rights and priorities it deems appropriate, and
          to fix or alter, from time to time, in respect of any Preferred Shares
          then unissued, the rights and


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          preferences of such shares, including without limitation, any or all
          of the following: dividend rate and dividend cumulation rights; voting
          rights; redemption rights and price; liquidation rights and price;
          conversion rights and sinking or purchase fund rights; or the number
          of shares constituting any class or series. The Board of Directors
          shall also have the power to fix the terms and provisions of options,
          rights and warrants to purchase or subscribe for shares of any class
          or classes and to authorize the issuance thereof. Dividends payable in
          shares of any class may be paid to shareholders of any other class as
          and when determined by the Board of Directors.

     b.   The voting rights of the shares of this Corporation shall be vested in
          the holders of all shares presently outstanding, with one vote per
          share. The voting rights of unissued shares shall be fixed by the
          Board of Directors, but no such share shall be entitled to more than
          one vote. No holder of any shares shall be entitled to any cumulative
          voting rights.

     c.   No shareholder of this Corporation shall have any pre-emptive right to
          subscribe for or purchase any shares of any class or series of the
          Corporation, whether now or hereafter established or authorized, or
          any securities or obligations convertible into any such shares, or any
          options or warrants or rights to purchase any such shares.

                                  ARTICLE VIII.

     Section 1. If any person has become an Acquiring Person as defined in
Section 2, each holder of Voting Shares, other than the Acquiring Person or a
transferee of the Acquiring Person, until and including the ninetieth day
following the date the notice to holders of Voting Shares referred to in Section
3 herein is mailed, shall have the right to have the Voting Shares held by such
holder redeemed by the Corporation at the Redemption Price determined as
provided in Section 4 herein, and each holder of securities convertible into
Common Shares or of options, warrants, or rights exercisable to acquire Common
Shares prior to such ninetieth day, other than the Acquiring Person or a
transferee of the Acquiring Person, shall have the right simultaneously with the
conversion of such securities or exercise of such options, warrants, or rights
to have the Common Shares to be received thereupon by such holder redeemed by
the Corporation at the Redemption Price; provided that no holder of Voting
Shares shall have any right to have Voting Shares redeemed by the Corporation
pursuant to this Article if the Corporation acting through a majority of its
Board of Directors shall either (a) recommend to the holders of Voting Shares
that a pending tender offer be accepted by the holders of Voting Shares or (b)
if no tender offer is pending it announces that it does not oppose any
accumulation of shares by an Acquiring Person; provided, however, that such
recommendation or announcement is made within ten days following either (i) the
announcement or publication of such tender offer made by an Acquiring Person,
(ii) any amendment to such tender offer, (iii) a vote by shareholders of the
Corporation for approval of the acquisition of shares by the Acquiring Person
(iv) receipt by the Board of Directors of credible notice that an Acquiring
Person exists, or (v) receipt by the Board of Directors of credible notice that
an Acquiring Person has increased ownership of Voting Shares by more than three
percent (3%) of the Voting Shares outstanding.

     Section 2. For purposes of this Article:


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          (a) The term "person" shall include an individual, a corporation,
     partnership, trust or other entity.

          (b) An "Acquiring Person" shall be any person who becomes the
     beneficial owner, directly or indirectly, of more than twenty percent (20%)
     of the voting shares outstanding and becomes the beneficial owner, directly
     or indirectly, of any additional Voting Shares pursuant to a tender offer
     or otherwise or (ii) becomes the beneficial owner, directly or indirectly,
     of more than fifty percent (50%) of the Voting Shares outstanding whether
     such shares were acquired by market purchases, a tender offer or otherwise.

          (c) For the purpose of determining whether a person is an Acquiring
     Person, such person shall be deemed to beneficially own (i) all Voting
     Shares with respect to which such person has the capability to control or
     influence the voting power in respect thereof and (ii) all Voting Shares
     which such person has the immediate or future right to acquire, directly or
     indirectly, pursuant to agreements, through the exercise of options,
     warrants or rights or through the conversion of convertible securities or
     otherwise; and all Voting Shares which such person has the right to acquire
     in such manner shall be deemed to be outstanding shares, but Voting Shares
     which any other person has the right to acquire in such manner shall not be
     deemed to be outstanding shares.

          (d) The term "Voting Shares" shall mean such of the Common Shares and
     the Preferred Shares of the Corporation as shall have been granted voting
     rights.

          (e) The acquisition of Voting Shares by the Corporation or by any
     person controlling, controlled by or under common control with the
     Corporation shall not affect the right to have Voting Shares redeemed
     pursuant to this Article.

          (f) The right to have Voting Shares redeemed pursuant to this Article
     shall attach to such shares and shall not be personal to the holder
     thereof.

          (g) The term "tender offer" shall mean an offer to acquire or an
     acquisition of Voting Shares pursuant to a request or invitation for
     tenders or an offer to purchase such shares for cash, securities or any
     other consideration.

          (h) The term "market purchases" shall mean the acquisition of Voting
     Shares from holders of such shares in privately negotiated transactions or
     in transactions effected through a broker or dealer.

          (i) Subject to the provisions of Section 2(c) herein, "outstanding
     shares" shall mean Voting Shares which at the time in question have been
     issued by the Corporation and not reacquired and held or retired by it or
     held by any subsidiary of the Corporation.

     Section 3. If Voting Shares are subject to redemption in accordance with
Section 1:

     (a) Not later than sixty (60) days following the date on which the
Corporation receives credible notice that any person has become an Acquiring
Person, the Corporation shall give written notice, by first class mail, postage
prepaid, at the addresses shown on the records of the Corporation, to each
holder of record of Voting Shares (and to any other person known by the
Corporation to have rights to demand redemption pursuant to Section 2 of this
Article) as of a date not more than seven (7) days prior to the date of the
mailing pursuant to this Section 3 and shall advise each such holder of the
right to have shares redeemed and the procedure for such redemption.

     (b) If the Corporation fails to give notice as required by this Section 3,
any holder entitled to receive such notice may within twenty (20) days
thereafter serve written demand upon the Corporation to give such notice. If
within


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twenty (20) days after the receipt of the written demand the Corporation fails
to give the required notice, such holder may at the expense and on behalf of the
Corporation take such reasonable action as may be appropriate to give notice or
to cause notice to be given pursuant to this Section 3.

     (c) The Directors of the Corporation shall designate a Redemption Agent,
which shall be a corporation or association (i) organized and doing business
under the laws of the United States or any State, (ii) subject to supervision or
examination by Federal or State authority, (iii) having combined capital and
surplus of at least $20 million, and (iv) having the power to exercise corporate
trust powers.

     (d) For a period of ninety (90) days from the date of the mailing of the
notice to the holders of Voting Shares referred to in this Section 3, holders of
Voting Shares and other persons entitled to have Voting Shares redeemed pursuant
to this Article may, at their option, deposit certificates representing all or
less than all Voting Shares held of record by them with the Redemption Agent
together with written notice that the holder elects to have such shares redeemed
pursuant to this Article. Redemption shall be deemed to have been effected at
the close of business on the day such certificates are deposited in proper form
with the Redemption Agent.

     (e) The Corporation shall promptly deposit in trust with the Redemption
Agent cash in an amount equal to the aggregate Redemption Price of all of the
Voting Shares deposited with the Redemption Agent for purposes of redemption.

     (f) As soon as practicable after receipt by the Redemption Agent of the
cash deposit by the Corporation referred to in this Section 3, the Redemption
Agent shall issue its checks payable to the order of the persons entitled to
receive the Redemption Price of the Voting Shares in respect of which such cash
deposit was made.

     Section 4. (a) The Redemption Price shall be the amount payable by the
Corporation in respect of each Voting Share with respect to which redemption has
been demanded pursuant to this Article and shall be the greater amount
determined on either of the following bases, but in no event shall the
Redemption Price be less than the amount of shareholders' equity in respect of
each outstanding Voting Share as determined in accordance with generally
accepted accounting principles and as reflected in any published report by the
Corporation as at the fiscal year quarter ending immediately preceding the
notice to shareholders referred to in Section 3 herein:

          (i) The highest price per Voting Share, including any commission paid
     to brokers or dealers for solicitation or whatever, at which Voting Shares
     held by the Acquiring Person were acquired pursuant to a tender offer
     regardless of when such tender offer was made or were acquired pursuant to
     any market purchase or otherwise within eighteen months prior to the notice
     to holders of Voting Shares referred to in Section 3 herein. For purposes
     of this subsection (i) if the consideration paid in any such acquisition of
     Voting Shares consisted, in whole or in part, of consideration other than
     cash, the Board of Directors of the Corporation shall take such action, as
     in its judgment it deems appropriate, to establish the cash value of such
     consideration, but such valuation shall not be less


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     than the cash value, if any, ascribed to such consideration by the
     Acquiring Person.

          (ii) The highest sale price per Voting Share for any trading day
     during the eighteen months prior to the notice to holders of Voting Shares
     referred to in Section 3 herein. For purposes of this subsection (ii), the
     sale price for any trading day shall be the last sale price per Voting
     Share traded on the New York Stock Exchange, any or other national
     securities exchange or the National Market System or, if Voting Shares are
     not then traded on the foregoing, the mean of the closing bid and asked
     price per Voting Share.

     (b) The determination to be made pursuant to this Section 4 shall be made
by the Board of Directors not later than the date of the notice to holders of
Voting Shares referred to in Section 3 herein. In making such determination the
Board of Directors may engage such persons, including investment banking firms
and the independent accountants who have reported on the most recent financial
statements of the Corporation, and utilize employees and agents of the
Corporation, who will, in the judgment of the Board of Directors, be of
assistance to the Board of Directors.

     (c) The determinations to be made pursuant to this Section 4, when made by
the Board of Directors acting in good faith on the basis of such information and
assistance as was then reasonably available for such purpose, shall be
conclusive and binding upon the Corporation and its shareholders, including any
person referred to in Section 2 herein.

     (d) Notwithstanding the foregoing provisions of this Section 4, each such
holder of Voting Shares shall have the right to have the Redemption Price to be
paid determined under and pursuant to the appraisal provisions of the Minnesota
Statutes then in effect.

     Section 5. This Article may be amended or repealed only by the affirmative
vote of the holders of 85% of each class of shares of the Corporation entitled
to exercise the voting power of the Corporation; provided, however, that if no
person holds more than twenty percent (20%) of the Voting Shares and there is no
tender offer pending or threatened of which the Board of Directors has credible
notice, the necessary vote for amendment or repeal may be reduced by the Board
of Directors to not less than the requirements of Article XII of these Articles
of Incorporation; provided, further that no amendment or repeal adopted after
the notice to holders of Voting Shares referred to in Section 3 herein shall
affect any Voting Shares theretofore or thereafter deposited with the Redemption
Agent for redemption under this Article pursuant to such notice.

                                   ARTICLE IX.

     The amount of stated capital with which this Corporation shall commence
business will be at least $1,000.

                                   ARTICLE X.

     Meetings of the shareholders, whether annual or special, shall be held at
the principal place of business of the Corporation at such time and date as may
be fixed in the By-Laws, or at any other place designated by the Board of
Directors


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pursuant to the By-Laws or consented to in writing by all of the shareholders
entitled to vote thereat.

                                   ARTICLE XI.

     Section 1. The business of this Corporation shall be managed by a Board of
Directors who shall be elected at the annual meeting of the shareholders. The
number of directors is hereby fixed at ten (10). The directors are hereby
divided into three classes, each class to consist as nearly as may be of
one-third of the number of directors then constituting the whole Board. The term
of office of those of the first class shall expire at the annual meeting in
1977. The term of office of the second class shall expire in 1978. The term of
office of the third class shall expire in 1979. At each annual election
commencing in 1977, the directors elected shall be chosen for a full term of
three years to succeed those whose terms then expire. Vacancies on the Board of
Directors may be filled by the remaining directors and each person so elected
shall be a director until his successor is elected at an annual meeting of
shareholders or at a special meeting duly called therefor.

     Section 2. The Board of Directors shall have all of the powers of the
Corporation, subject to such action restricting said powers as may legally be
taken from time to time by the shareholders either at an annual meeting or at a
special meeting duly called therefor.

     Section 3. The Board of Directors shall have authority to make and alter
By-Laws, subject to the power of the shareholders to change or repeal such
By-Laws, provided, however, that the Board shall not make or alter any By-Law
fixing the number, qualifications, or term of office of Directors.

     Section 4. Any contract or other transaction between the Corporation and
one or more of its directors, or between the Corporation and any corporation,
association or firm of which one or more of its directors are shareholders,
members, directors, officers or employees, or in which they are interested,
shall be valid for all purposes, notwithstanding the presence and participation
of such director or directors at the meeting of the Board of Directors of the
Corporation which acts upon or in reference to such contract or transaction, if
the fact of such interest shall be disclosed or known to the Board of Directors,
and the Board of Directors shall, nevertheless, authorize, approve and ratify
such contract or transaction by a vote of a majority of the directors present,
such interested director or directors to be counted in determining whether a
quorum is present, but not to be counted in calculating the majority necessary
to carry such vote. This section shall not be construed to invalidate any
contract or transaction which would otherwise be valid under the laws applicable
thereto.

     Section 5. The annual meeting of the Board of Directors shall be held
immediately following the annual meeting of the shareholders, and at the same
place.

     Section 6. The names and post office addresses of the directors at the time
of adoption of these Restated Articles of


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Incorporation are as follows:

Winslow H. Buxton
Pentair, Inc.
1500 West County Road B2
St. Paul, MN  55113-3105

Joseph R. Collins
Pentair, Inc.
1500 West County Road B2
St. Paul, MN  55113-3105

Stuart "Chuck"Maitland
Ford Motor Company
Vehicle Operations General Office, Rm A-212
17000 Oakwood Boulevard
Allen Park, MI  48101

Augusto Meozzi
Via delle Lame, 34
50126 Florence, Italy

William J.  Cadogan
ADC Telecommunications, Inc.
P.O. Box 1101
Minneapolis, MN  55440-1101

Barbara Grogan
Western Industrial Contractors
5301 Joliet Street
Denver, CO  80239-2112

Charles Haggerty
Chairman, President and CEO
Western Digital Corporation
8105 Irvine Center Drive
Irvine, CA  92718

Harold V.  Haverty
1 Wood Duck Lane
North Oaks, MN  55127

Karen E.  Welke
3M Center, Building 220-14E-16
St. Paul, MN  55144

Quentin J. Hietpas
University of St. Thomas
2115 Summit Avenue, AQU104
St. Paul, Minnesota 55105

Richard M.  Schulze
Best Buy Co., Inc.
7075 Flying Cloud Drive
Eden Prairie, MN  55344

     Section 7. A Director of this Corporation shall not be personally liable to
the Corporation or its shareholders for monetary damages for breach of fiduciary
duty as a Director, except to the extent such exemption from liability or
limitation thereof is not permitted under Section 302A.251 of the Minnesota
Statutes.

     If Chapter 302A of the Minnesota Statutes hereafter is amended to authorize
the further elimination or limitation of the liability of directors, then, in
addition to the limitation on personal liability provided herein, the liability
of a Director of the Corporation shall be limited to the fullest extent
permitted by the amended Chapter 302A of the Minnesota Statutes.

     Any repeal or modification of this Section 7 by the shareholders of the
Corporation shall be prospective only and shall not adversely affect any
limitation of the personal liability of a Director of the Corporation existing
at the time of such repeal or modification.

                                  ARTICLE XII.

     These articles may be amended by resolution setting forth such amendment or
amendments adopted at any meeting of the shareholders by the affirmative vote of
the holders of 60% of the voting power of all shareholders entitled to vote,
provided such amendment or amendments shall not receive the negative vote of the
holders of more than 25% of the voting power of all shareholders entitled to
vote. Each share of stock shall entitle the holder thereof to one vote.


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     IN WITNESS WHEREOF, the undersigned corporation has caused these Second
Restated Articles of Incorporation to be executed by its Chief Executive Officer
and attested by its Secretary this _____ day of ____________, 1999.

                                     PENTAIR, INC.

                                     ------------------------------------------
                                     Winslow H. Buxton, Chief Executive Officer

ATTEST:

- -------------------------------
Roy T. Rueb, Secretary

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