Hayward SPX1425Z6 O-Ring Replacement for Select Hayward Fittings, Union and Filters O-ring replacement Fits hayward perflex de filter models ec65, ec65a, ec75, ec75a Also fits hayward pro series sand filter models s200pak 3 system base, s240pak 2 3 and system ii, s200pak 2, 3 and system ii Also compatible with Hayward ASL filter series cartridge filter models C850, C1250 Also compatible with hayward self-align unions and fitting models sp1480, sp1482, sp1484, sp1485