groz 45560 12v dc high flow heavy duty electric oil drum transfer pump designed specifically to transfer bulk oils, hydraulic oils, antifreeze or antifreeze mixes. Non-corroding aluminum die cast pump body. A high horsepower to flow ratio assures adequate power to pump viscous fluids at low temperatures. Sintered powder metal gears. Self-priming, positive displacement design. Pump has an internal bypass valve to bypass flow if the discharge pressure exceeds bypass valve setting. Built-in 2″ bung adaptor for mounting directly onto drums and tanks. Can be used to transfer used oil also. Just fitting a screen onto the suction tube makes it effective for transferring used oil.