Pentair 51005000 Drain Plug O-Ring Replacement Pool/Spa Filter and Valve Drain plug o-ring replacement Fits Pentair Clean & Clear, Plus, Predator pool/spa cartridge filter Also fits Pentair Warrior, EasyClean, FNS D.E. and Meteor sand pool/spa filters Also compatible with Pentair Push Pull and Slide pool/spa valves Measures 1-3/4-inch length by 1/4-inch height by 1-3/4-inch width