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Automatic Anti-Vacuum Valves

A compact range of Anti-Vacuum Valves for use with hot water heaters to prevent a vacuum forming in installations where there is the potential for the draw off rate to exceed the rate of flow to the inlet; this can occur in properties with multiple outlets below the base of the hot water heater.

The valves contain a check cartridge which, under normal conditions, is held closed by the system pressure, but when a vacuum condition arises the suction will cause the check cartridge to open and air to flow through, equalising the pressure within the hot water heater.

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