Product overview This 12V replacement water pump is a directfit OEM style replacement featuring a self priming diaphragm design, pressure output rated at 130 PSI, and an integrated automatic pressure switch. It is intended for systems that require a 12 volt diaphragm pump with automatic on off control and pressure performance. Key benefits Reliable automatic operation: Built in automatic pressure switch turns the pump on when demand is detected and off when pressure is reached, eliminating the need for manual valves or switches. Self priming design: The diaphragm self priming function reduces setup time and simplifies repriming after air enters the line, improving usability in mobile and intermittent use applications. pressure performance: 130 PSI rating delivers strong, consistent pressure for applications that require higher output than standard low pressure pumps. 12 volt compatibility: Designed for 12V DC electrical systems commonly found in mobile, marine, and off grid setups, allowing easy integration with vehicle or battery power. OEM replacement fit: Intended as a like for like replacement that matches OEM function and control, helping simplify repairs and restorations. Important attributes Function: Self priming diaphragm pump with built in automatic pressure switch for demand responsive operation. Voltage: 12V DC. Pressure rating: 130 PSI maximum operating pressure. Role: Replacement pump compatible with systems that use a 12V diaphragm pump with automatic switching and pressure output. Practical use scenarios RV and camper fresh water system: Restores pressurized water to sinks and showers when replacing a failed 12V diaphragm pump and automatic switch. Small boat or marine freshwater system: Provides pressure delivery for onboard sinks and washdown systems using 12V power. Mobile cleaning or spraying equipment: Supplies consistent pressure and automatic on off control for portable sprayers or washdown stations powered from a 12V source. Installation and compatibility notes Confirm electrical system is 12V DC and that plumbing and mounting points match the original pump before installation. Intended as an OEM style replacement for 12V diaphragm pumps rated at 130 PSI with an integrated automatic pressure switch. Verify compatibility with your specific equipment model and plumbing connections. This replacement pump focuses on restoring original function: automatic pressure control, self priming operation, and pressure performance in 12V systems.