Abstract: An air control valve assembly includes a semi-tractor that has an air brake system and a tanker trailer for containing a liquid. A gladhand air fitting is fluidly attachable to the air brake system and a valve is fluidly coupled to the gladhand air fitting. The valve is positionable in an open position to pass air through the valve and the valve is positionable in a closed position to inhibit air from passing through the valve. An air king fitting is fluidly coupled to the valve to receive the compressed air from the valve when the valve is in the open position. The air king fitting is releasably matable to the tanker trailer having the air king fitting. In this way the air king fitting can pressurize the interior of the tanker trailer for discharging fluid contained in the tanker trailer.

Abstract: An air control valve assembly includes a semi-tractor that has an air brake system and a tanker trailer for containing a liquid. A gladhand air fitting is fluidly attachable to the air brake system and a valve is fluidly coupled to the gladhand air fitting. The valve is positionable in an open position to pass air through the valve and the valve is positionable in a closed position to inhibit air from passing through the valve. An air king fitting is fluidly coupled to the valve to receive the compressed air from the valve when the valve is in the open position. The air king fitting is releasably matable to the tanker trailer having the air king fitting. In this way the air king fitting can pressurize the interior of the tanker trailer for discharging fluid contained in the tanker trailer.