Attributes . No For use with Ace Nos. 4158515 and Culligan US-550. *Use the SW-1 wrench to loosen bottom of housing during cartridge replacement. Slide circular end over housing until a snug fit 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. . Names