Hayward SPX1500RA Check Valve Assembly Replacement for Select Hayward Pumps, Filters and Lighting Check valve assembly replacement Fits hayward perflex extended-cycle d.e. filter and astrolite pool lighting models ec301540esnv, ec50c80x5s, sp0584sl100 Also fits hayward power-flo lx flooded suction pump models sp1575lx, sp1580, sp1580x15, sp1520un, ep1500lx, sp1680 Also compatible with Hayward Power-Flo II Self-Priming pump models SP1705, SP1710, SP1711, SP1720, SP1725, SP1750, SP1775, SP1780 Also compatible with hayward abg and power-flo flooded suction pump models sp1500, sp1510, sp1511, sp1550, sp1575, ep1500, sp1516; suitable for models prior to 1990