PENTAIR plc — Director's Dealing 2012

May 15, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PENTAIR INC (PNR)
CIK: 0000077360
Period of Report: 2012-05-14

Reporting Person: MONAHAN WILLIAM T (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-14	Common Stock	M	10000	$17.725	Acquired	34901.149	Direct
2012-05-14	Common Stock	S	10000	$42.3139	Disposed	24901.149	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-14	Nonqualified Stock Option (right to buy)	$17.725	M	10000	Disposed	2013-02-25	Common Stock (10000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock - Deferral Plan	1331.483	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Phantom Stock Units (Deferred Compensation)	$		Common Stock (10056.215)	10056.215	Indirect

Footnotes

F1: The price in Column 4 is a weighted average price. The prices actually received ranged from $42.30 to $42.3601. The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price.

F2: End-of-period holdings include shares acquired under a dividend reinvestment plan in exempt transaction not required to be reported pursuant to Section 16(a).

F3: Phantom stock units convert into common stock on a one-for-one basis.

F4: Settlement of phantom stock units will be in accordance with reporting person's irrevocable election.