12V RV Diaphragm Water Pump, 4 GPM, 40 PSI, Auto Switch

12V RV water pump delivers on-demand water flow for steady faucets, showers, and washdowns without constant cycling. This 3-chamber self-priming diaphragm design reaches up to 4 GPM (15.1 L/min) and 40 PSI to pull from distant tanks and keep pressure consistent. Built with a protective cover, heavy-duty power cord, and quick 1/2 in hose connections for faster installs in RVs, caravans, boats, and utility setups.

• Delivers up to 4 GPM (15.1 L/min) flow with 40 PSI max pressure for strong, stable water supply


• Starts automatically when a tap opens and stops when it closes via built-in pressure switch and bypass valve


• Reduces vibration and pulsation with a 3-chamber diaphragm and copper motor for quieter operation (about 50 dB)


• Connects to standard 1/2 in lines with included adapter, clamps, thread tape, and inlet filter to help prevent leaks


• Protects with overload and overheat safeguards; supports short dry-run starts and up to 10 ft self-priming

Set up a reliable on-demand water system for your RV, camper, caravan, marine, yacht, food truck, garden irrigation, or car washing. The adjustable pressure switch lets you fine-tune output with a hex wrench, while the included filter helps keep larger debris out of the pump. Install in a dry, protected area—this unit is not waterproof and isn’t intended for outdoor exposure. Grab yours today and upgrade your water pressure without the noise and hassle.

• Voltage: DC 12V


• Power: 156W


• Max flow: 4 GPM (15.1 L/min)


• Max pressure: 40 PSI


• Self-priming height: up to 10 ft


• Inlet/Outlet: 1/2 in MNPT


• Design: 3-chamber self-priming diaphragm pump with automatic pressure switch


• Included: protective cover, heavy-duty power cord, hose adapter, stainless steel clamps, PTFE thread tape, inlet filter