Expansion Control Valves prevent damage to hot water heaters by maintaining safe, water pressure. Excessive cold water pressure is released to atmosphere thereby ensuring controlled water conditions are maintained. As a result of the controlled water pressure, the water heater has ideal water conditions to operate efficiently.

• User friendly pressure release handle

• Auxiliary relief valve that provides addition protection in case of a blockage in the drain line

• Non-serviceable and non-adjustable

• Dry spring construction

• Complies with AS 1357.2