Hayward CHXRLV1930 Relief Valve Replacement for Select Hayward H-Series Pool Heater Replacement relief valve Fits hayward h-series millivolt heater models h1501, h150p1, h2001, h200p1, h2501, h250p1 Also fits hayward h-series pool heater models h100id1, h100idp1 Also fits Hayward H-Series models CZ,HM2,CPS,PSG,SG Weighs 18.7 pounds