The Bosworth Guzzler is a self-priming manually operated diaphragm pump. Use to dewater bilges and holds, or transfer watery sewage to or from holding tanks. Capable of a 12" suction lift. This flush mount pump has a removable vertical handle, flapper valves, nitrile diaphragm, stainless steel actuator, and 1-1/2 smooth inlet and outlet hose connections.