Pentair 98209800 High Flow Air Relief Valve FEATURES AND BENEFITS High flow manual relief valve replacement Fits Pentair Clean & Clear Aboveground, Clean & Clear Plus, Clean & Clear/Predator pool and spa cartridge filters Also fits Pentair Warrior, EasyClean Aboveground, EasyClean, FNS Plus, SM & SMBW 4000 Series pool and spa D.E. filters Measures 6-inch length by 2-3/4-inch height by 8-1/2-inch width