Hayward GMX600F O-Ring Seal O-263 – for Pro Series Sand Filter S144T/SP071620T

Target audience: Users of Hayward Pro Series S144T or SP071620T sand filters. Primary use case: Replacing a large O-ring (O-263) at the junction between the filter's multiport valve and the tank. Failure of this O-ring can result in significant valve leakage, making it an essential replacement part for sand filter overhauls.