Pentair Pentek SW-4 Spanner Wrench for 20" Big White Housings Description The Pentek SW-4 Filter wrench is a durable and simple filter housing removal tool that will make changing filters easier. Used on the Pentek Big Blue filter systems.Do not use to tighten housing, to prevent risk of over tightening Features: COMPATIBLE WITH PENTAIR PENTEK 20" BIG BLUE HOUSING SUMPS and most other 20" heavy duty housings EASILY REMOVES FILTER HOUSINGS for quickly changing water filter cartridges HELPS LOOSEN STUCK OR JAMMED FILTER HOUSINGS SUITABLE FOR USE in installing or replacing filter cartridges CONSTRUCTED OF DURABLE PLASTIC for stability and resistance to corrosion Product Details: Color: White Brand: Pentek Material: Plastic Item Weight: 3.5 Ounces Item Package Quantity: 1 Color: White Brand: Pentek Material: Plastic Item Weight: 3.5 Ounces Item Package Quantity: 1 Operation Mode: Mechanical Manufacturer: Pentair Industries Part Number: SW-4 Item Weight: 3.5 ounces Product Dimensions: 12 x 8 x 2 inches Item model number: SH144368 Is Discontinued By Manufacturer: No Size: 20" Big Blue Style: Old Version Pattern: Wrench Number Of Pieces: 1 Included Components: wrench Batteries Included?: No Batteries Required?: No Date First Available: February 19, 2008