LPG NG 8L Gas Water Heater Fittings 3V 24V Solenoid Valve Water Vapor Linkage Valve Assembly For Macro 8L2 8P2 8M3 1. study the shape, totally the form of an identical constitution of the water valve is likely to be general2. be taught the size, length also is the same phrases could be universal3. Pay attention to the voltage of the Solenoid Valve,3v or 24v.