SW-3 Water Filter Wrench. This wrench fits most standard Big Blue 10"x4.5" and 20"x4.5" housings, including Pentair / Pentek, American Plumber, Ametek, US Filter, Culligan, Crystal Quest and others. Use this SW3 wrench to loosen the bottom part of the housing during filter replacement.
Can be used with #10 Big Blue canisters, Culligan Pentek HD-950, Ace Hardware 49561, Ametek Kleen-Plus HD-10-R50 BBS, American Plumber W10-PR / 152014 water filter housings, American Plumber W15-PR / 152016 housings, Pentek 150237, 150239, 150469 whole house filter housings.