The RMC High Pressure Expansion Control Valve limits the maximum pressure in a pressurised, unvented water heater system by relieving excess pressure to the drain line.

• Increased heating efficiency
• Releasing pressure at the inlet saves energy by not purging heated water
• Auxiliary pressure relief device
• Additional protection in the event of drain line blockage obstruction
• Dezincification resistant
• Meets Australian Standard for potable water supply
• Sealed spring cavity prevents spring from seizing in the event of calcification
• Valve designed to work effectively in vertical or horizontal installations