1. is suitable for type solar water heater system. 2.Size:inch 1/2 3.Material: ... for bearing the pressing type solar water heater,gas heater,electric heater,water heater for fuel,water heater of heat pump,sensitive function ... ANSI Z21.22 RELIEF VALVES.3.Technical Parameter:1)Standard setting(Mpa):0.10,0.30,0.50,0.60,0 ... to the needs of user’s contract for future delivery. water pressure reducing valve