O-Ring 1.5in Buttress x 1.5in MPT Fitting Waterway, 8050224
O-Ring, 1.5in Buttress x 1.5in MPT Fitting for Waterway Swimming Pool Filters, 805-0224. This O-ring fits the double threaded adapter that is used in Waterway and Namco pump and filter systems for aboveground pools. O-ring seals the fitting as it screws into the Waterway multiport valve. See More Waterway Clearwater Filter system parts in our filter parts department.