12V Diaphragm Water Pump, 40 PSI, 17 L/min Self-Priming

12V high pressure diaphragm water pump delivers steady 40 PSI water flow for sprayers, misting systems, RV plumbing, and transfer tasks where weak pressure causes downtime. This automatic self-priming unit reaches up to 17 L/min and can run dry for short periods, with built-in thermal protection to help prevent overheating. Cast iron construction with a powder-coated finish supports long service life in caravans, boats, garden setups, and worksite applications.

• Delivers up to 17 L/min flow and 40 PSI (2.76 bar) pressure for misting, boosting, and liquid transfer


• Starts automatically with pressure switch action to maintain consistent output at taps, sprayers, and lines


• Includes a metal inlet filter to help reduce debris and protect internal diaphragms and valves


• Handles self-priming up to 6 ft (within 2 m) for faster starts and fewer manual priming steps


• Supports run-dry capability and thermal protection to reduce damage during brief low-water events

Built around a 3-chamber diaphragm design, this compact booster solution is engineered for stable performance with quick assembly using 3/4" hose barb threaded ports. Use it for caravan and RV water systems, boat washdowns, garden misting, cooler circulation, or filling and transfer where reliable pressure matters. Match it with a suitable 12V DC power source rated for the current draw, and install the included filter on the inlet side for cleaner operation. Grab yours today and keep water pressure consistent wherever you travel or work.

• Type: 3-chamber diaphragm


• Voltage / Current: 12V DC / 9.2A


• Max pressure: 40 PSI (2.76 bar)


• Flow rate: up to 17 L/min


• Self-priming height: 6 ft (within 2 m)


• Run dry: Yes


• Inlet/Outlet: 3/4" hose barb, threaded


• Material: Cast iron, powder-coated finish


• Net weight: 2.4 kg


• Included: Metal inlet filter