Use the SW-1 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 SW-1 wrench to tighten the bottom of the housing. Only hand-tighten the bottom of the housing onto the cap to prevent cracking.
The SW-1 makes changing water filters easy.
The SW-1 spanner wrench can be used with Slim Line and 3G housings.
Use the Culligan / Pentek SW-1 Wrench With:
3.5" Diameter Housings
#5 & #10 Slim Line Housings
3/8" Inlet/Outlet Slim Line Housings with 3.5" diameter housing sumps