Heavy Duty Positive Displacement Vane Pump - 12VGROCO Vane Pumps are self-priming 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: NoneMax GPM: 6.5Breaker DC: 30 Amp