Consists of a robust self-priming flexible impeller pump mounted to an easy to install base and coupled to a five port manifold, factory fitted with three full flow ball valves. This system includes a pump reversing switch to pump used oil out and new oil in, the cover includes a hinged valve cover to protect them from being accidentally opened, and the valve cover will not close after an oil change unless valves are securely closed. Complies with USCG 183.410 and ISO 8846 Marine (ignition protected). 1/2" NPT Ball valves. Size 5-1/4" H x 10-7/8" W x 11" D Volts 12