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RMC Expansion Valve 20mm 1200kpa H707
High Pressure Expansion Control Valves limit the maximum pressure in a pressurised, 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 available in 15 mm and 20 mm configurations.