POWER OF ATTORNEY

       Know all by these presents that the undersigned hereby constitutes and
appoints each of Louis L. Ainsworth and Angela D. Lageson, signing singly, the
undersigned's true and lawful attorneys-in-fact to:

(1)	execute for and on behalf of the undersigned, in the undersigned's capacity
as an officer and/or director of Pentair, Inc. (the "Company"), Forms 3, 4, and
5 in accordance with Section 16(a) of the Securities Exchange Act of 1934 and
the rules thereunder;

(2)	do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete and execute any such Form 3, 4, or 5
and timely file such form with the United States Securities and Exchange
Commission and any stock exchange or similar authority; and

(3)	take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of each such attorney-in-fact, may be of benefit
to, in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by each such attorney-in-fact on behalf
of the undersigned pursuant to this power of attorney shall be in such form and
shall contain such terms and conditions as each such attorney-in-fact may
approve in each such attorney-in-fact's discretion.

       The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that each such
attorney-in-fact, or each such attorney-in-fact's substitute  or substitutes,
shall lawfully do or cause to be done by virtue of this power of attorney and
the rights and powers herein granted.  The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.  The undersigned accepts, through his or her signature,
the responsibilities conferred by the power of attorney.

       This power of attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

       IN WITNESS WHEREOF, the undersigned has caused this power of attorney to
be executed as of this 8th day of February, 2010.



                                                    John L. Stauch