American Plumber, Culligan, Pentek SW-2 Filter Housing Wrench

Use the SW-2 filter wrench to loosen the bottom of the housing during cartridge replacement. Slide circular end over housing until a snug fit is achieved and unscrew. The SW-2 wrench makes changing water filters easy. The SW-2 can be used with standard whole house housings. DO NOT use the SW-2 housing wrench to secure the water filter canister to the water filter cap. Over-tightening the sump can cause damage to the o-ring and make reopening the water filter housing difficult. You should only hand tighten the housing sump.