Operation of the SKID DUMP begins with fluids entering the SKID DUMP through the inlet pipe and internal inlet valve (1). As the fluid level increases, a float will rise to move the 3 way control valve (2) to the pressure position. Pneumatic pressure then flows from the supply connection (3), through the control valve (2), to shift the vent valve (4) to the closed position and the pressure valve (5) from the vent position to the pressure position. Pneumatic pressure then flows (3) through the pressure valve (5) and into the SKID DUMP to close the internal inlet valve and pressurize the SKID DUMP to force the liquid contents out of the SKID DUMP through the discharge port (6). As the liquid level decreases, the float will descend and move the control valve (2) to the off/exhaust position. This will exhaust the supply pressure from the vent valve and pressure valve to return them to the vent position and stop the flow of pneumatic pressure into the SKID DUMP and exhaust any remaining pressure inside. As the pressure is relieved, the internal inlet valve opens to allow more fluids to enter the SKID DUMP.