Combination Air Valves are critical for system protection


Combination Air Valves purge air from the system at start-up, vent small pockets of air while the system is pressurized and running, and prevent critical vacuum conditions during draining.

Most applications for Air Valves require air to be exhausted both at start-up and while operating, in addition to incorporating vacuum protection during draining. The GA Combination Air Valve consists of an Air & Vacuum Valve and an Air Release valve. At start-up both valves exhaust air as the system is filled. Once the air is purged, the valve float is lifted by liquid closes the valve. Small pockets of air entering the valve displace the liquid and lower the float, allowing the Air Release valve to open and exhaust the air. When the system pressure drops, the float drops and opens both valves, admitting large amounts of air to prevent critical vacuum conditions.   

Combination Air Valves are primarily used on water mains, transmission lines and sewage force mains. They are also used at the discharge of pumps, especially deep well turbine pumps.

Air Valves


9025 Marshall Road
Cranberry Township, PA 16066
United States
+1 724-776-1020 +1 724-776-1254 Write e-mail