An air valve for a paint gun includes a closure member configured for fitting in a valve chamber of a paint gun, which valve chamber intersects an air flow chamber of the gun. The closure member having two sealing points which, in use, when the valve is in its closed configuration, seal against an inner surface of the valve chamber at opposing sides of the air flow chamber thereby closing the airflow chamber. The valve further includes a conduit passing through the closure member providing fluid communication between the first and second sealing surfaces, and a biasing element for biasing the closure member into the closed position when no external load is applied.