PENTAIR plc — Director's Dealing 2006

Mar 30, 2006

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PENTAIR INC (PNR)
CIK: 0000077360
Period of Report: 2006-03-27

Reporting Person: WELKE KAREN E (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2006-03-27	Common Stock	M	3900	$11.375	Acquired	23101.207	Direct
2006-03-27	Common Stock	M	2600	$18.0938	Acquired	25701.207	Direct
2006-03-27	Common Stock	F	2258	$40.47	Disposed	23443.207	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2006-03-27	Nonqualified Stock Option (right to buy)	$11.375	M	3900	Disposed	2011-01-02	Common Stock (3900)	Direct
2006-03-27	Nonqualified Stock Option (right to buy)	$18.0938	M	2600	Disposed	2010-01-03	Common Stock (2600)	Direct

Footnotes

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 derivative security has been adjusted to reflect the stock split.