Transfer Pump 12L/min | In-Line Power Switch | 12V Marine Truck Diesel Water

This inline 12-volt transfer pump moves up to 12 liters per minute of diesel and water. The slim housing drops directly into drums or fuel tank necks. An integrated line switch cuts power immediately without touching the battery leads. Features and Benefits - 12-liter-per-minute flow rate - Empties drums and reservoirs in just a few minutes - 38mm submersible casing - Slides into standard drum bung holes and narrow fuel jugs - In-line cord toggle switch - Lets you stop liquid flow without pulling battery clips - Base inlet filter screen - Keeps solid debris out of the impeller and hose lines Applications - Refueling tractors, generators, and field machinery from diesel barrels - Clearing standing water from boat decks and trailer footwells - Transferring fuel into small equipment tanks around workshops Key Compatibility Differences A diesel transfer pump cannot be used for gasoline. Petrol has a low flash point and creates volatile vapours, meaning standard electric units risk ignition. Pumps rated for diesel and water do not have the explosion-proof motor casings or internal seals required for high-volatility spirits. This 12V unit handles diesel, general fuel, and water safely. It is engineered for heavier hydrocarbon fuels rather than low-flashpoint liquids. Running petrol through non-rated equipment damages internal components and creates severe fire hazards, particularly in warm working environments approaching 43°C where vapour pressure increases rapidly. What It Is What is a diesel transfer pump? It is a dedicated 12V electric fluid transfer pump designed for moving non-volatile liquids between storage tanks, vehicle reservoirs, and plant equipment. Weighing just 322g, this compact unit features an integrated in-line power switch for immediate control over pumping operations. It delivers a steady flow rate of 12 litres per minute, making it a portable solution for site refuelling, fluid drainage, and daily fluid handling without relying on mains power. It connects directly to low-voltage DC power sources on site. Key Uses & Applications This unit is designed for mobile plant, utility vehicles, and workshops handling standard fuels and water. Typical tasks include: - Transferring diesel into commercial vehicles, trailers, and plant machinery - Draining and topping up onboard water tanks on marine vessels and boats - Moving fuel on site directly from drums using a standard 12V vehicle battery - Flushing and emptying water reservoirs in site trailers and work trucks The pump remains reliable across varied operating temperatures, working effectively from cold morning starts near 45°F up to high ambient workshop heat around 43°C.