Filter Body Nut

This is the large body nut that goes around the outside of the Waterway filter canister body to tighten the canister to the hot tub shell. Part details: Standard style threaded nut for the Waterway filter canister Used in some Coast Spas and Hydropool Spas models Genuine Waterway plastics part OEM part number 718-1000 Also fits the following filter canisters:Dyna-Flo Skim Filter, Dyna-Flo XL Skim Filter, Ultra Skim Filter Assemblies, Part #13 on the schematic When purchasing replacement parts for the top loading filter in your hot tub always confirm replacement part compatibility to ensure proper fit.