Our #21 steel water filter 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) – 5.7″. Fits the double O Ring Big Grey and Black Axeon and Intelifil filter housings that use 4.5″ filters. The #21 steel water filter wrench also fits the 10″ Double O Ring Axeon and Intelifil filter housings.
