SW-4 Spanner Wrench for Big Blue Housings (20 inch)
Pentair Filter Housing Wrenches Use the filter wrench ONLY for twisting off water filter housing canisters. Use the wrench to loosen bottom of housing during cartridge replacement. Slide circular end over housing until a snug fit is achieved and unscrew. DO NOT use the wrench to tighten the bottom of the housing. Only hand-tighten the bottom of the housing onto the cap to prevent cracking. Makes changing water filters easy. The SW-1 is to be used with Slim Line and 3G housings. The SW-2 is to be used with standard whole house housings. The SW-3 is to be used with #10 Big Blue whole house housings. The SW-4 is to be used with #20 Big Blue whole house housings.