Heavy Duty Positive Displacement Reversing Vane Pump - 12VGROCO Vane Pumps are self-priming, are instantly reversible, and are capable of operation in either direction. Relatively high flow (more than gear pumps) makes them suitable for general purpose duties such as deck-wash, bilge pumping (filtered inlet),  fuel transfer, ballast transfer, and oil change.  All models have an ignition protected motor and #316 stainless steel shaft.Specifications:Self Priming: YESThread NPT: 1/2" + Garden Hose AdaptorControl Type: Pump Mounted Reversing SwitchMax GPM: 6.5Breaker DC: 30 Amp