Hayward SPX1495Z1 Union O-ring Union o-ring replacement Fits hayward power-flo sp1500 pump series model sp1500, sp1510, sp1511, sp1550, sp1575, ep1500 series, pump strainer sp1516 Also fits hayward power-flo ii sp1700 pump series models sp1705, sp1710, sp1711, sp1720, sp1725, sp1750, sp1775, sp1780 Also compatible with Hayward Ball Valves and Flush Unions models SP0722, SP0723, UN, SP1495, SP1498 Weighs 1.7 pounds