PENTAIR plc — Director's Dealing 2006

Feb 8, 2006

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PENTAIR INC (PNR)
CIK: 0000077360
Period of Report: 2006-02-06

Reporting Person: HARRISON DAVID D (Executive Vice President, CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2006-02-06	Common Stock	M	29334	$17.47	Acquired	196280.717	Direct
2006-02-06	Common Stock	M	36666	$22.88	Acquired	232946.717	Direct
2006-02-06	Common Stock	M	14978	$26.7	Acquired	247924.717	Direct
2006-02-06	Common Stock	F	57986	$37.92	Disposed	189938.717	Direct
2006-02-08	Common Stock	S	1000	$37.92	Disposed	188938.717	Direct
2006-02-08	Common Stock	S	100	$37.94	Disposed	188838.717	Direct
2006-02-08	Common Stock	S	200	$37.98	Disposed	188638.717	Direct
2006-02-08	Common Stock	S	200	$38	Disposed	188438.717	Direct
2006-02-08	Common Stock	S	2500	$38.05	Disposed	185938.717	Direct
2006-02-08	Common Stock	S	1000	$38.06	Disposed	184938.717	Direct
2006-02-08	Common Stock	S	1000	$38.09	Disposed	183938.717	Direct
2006-02-08	Common Stock	S	1700	$38.1	Disposed	182238.717	Direct
2006-02-08	Common Stock	S	300	$38.11	Disposed	181938.717	Direct
2006-02-08	Common Stock	S	1000	$38.12	Disposed	180938.717	Direct
2006-02-08	Common Stock	S	4000	$38.13	Disposed	176938.717	Direct
2006-02-08	Common Stock	S	200	$38.16	Disposed	176738.717	Direct
2006-02-08	Common Stock	S	400	$38.17	Disposed	176338.717	Direct
2006-02-08	Common Stock	S	1400	$38.18	Disposed	174938.717	Direct
2006-02-08	Common Stock	S	2905	$38.19	Disposed	172033.717	Direct
2006-02-08	Common Stock	S	1000	$38.4	Disposed	171033.717	Direct
2006-02-08	Common Stock	S	1000	$38.41	Disposed	170033.717	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2006-02-06	Employee Stock Option (right to buy)	$17.47	M	29334	Disposed	2013-01-02	Common Stock (29334)	Direct
2006-02-06	Employee Stock Option (right to buy)	$22.88	M	36666	Disposed	2014-01-02	Common Stock (36666)	Direct
2006-02-06	Employee Stock Option (right to buy)	$26.7	M	14978	Disposed	2010-02-23	Common Stock (14978)	Direct
2006-02-06	Employee Stock Option (right to buy)	$37.92	A	22122	Acquired	2014-01-02	Common Stock (22122)	Direct
2006-02-06	Employee Stock Option (right to buy)	$37.92	A	13514	Acquired	2013-01-02	Common Stock (13514)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	203.228	Indirect

Footnotes

F3: Reload stock option becomes exercisable upon grant and expires on the same date as the original option grant.

F2: Employee reload stock option granted pursuant to the Pentair, Inc. Omnibus Stock Incentive Plan.

F1: On May 17, 2004, Pentair declared a 2-for-1 stock split in the form of a 100 percent stock dividend payable on June 8, 2004, to shareholders of record as of June 1, 2004. This previously reported stock option and exercise price have been adjusted to reflect the stock split.