Our Pentek SW-4 replacement wrench is constructed of steel. This water filter housing wrench will be the last wrench you ever need. If you have had trouble getting your housings loose during filter changes or if you have ever broken a plastic wrench, then you need our Galvanized water filter wrench. It will not bend, break, or bow.
Inside Diameter (not from the tabs) - 6". Replaces the Pentek SW-4 wrench and fits most #20 Big Blue housings.
Not sure what size filter housing wrench you need? Find the correct one on ourChoosing the Right Filter Housing Wrench page.