High Pressure Expansion Control Valves limit the maximum pressure in a pressurized, unvented water heater system by relieving excess pressure to the drain line. The valve is a functional control for this type of application.
High Pressure Expansion Control Valves should only be installed on the cold or inlet installation on a water heater as the valve is primarily intended to cope with the excess pressure generated during a normal heating cycle.
RMC™ High Pressure Expansion Control Valves are currently available in 15mm and 20mm configuration.
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