GROCO Gear Pump 3/4" NPT Ports - 12V [GPB-1 12V]Gear Pump 3 4" NPT Ports 12V Positive Displacement Gear Pump The Concept: Made in the USA GROCO Gear Pumps are self priming, instantly reversible, and are capable of operation in either direction. Relatively low flow (less than vane pumps) makes them suitable for duties such as deck wash, fuel transfer, ballast transfer, and oil change. All models have an ignition protected motor, #316 stainless steel shaft, and are available in models that provide