3 GPM 12V Electric Diaphragm Water Pump w/Switch
$372.20 on Amazon.com (as of June 18, 2026, 11:49 AM EST) View details ↗
This high-performance 3-4 GPM 12V electric diaphragm water pump is engineered for reliable freshwater delivery in RVs, boats, and marine applications. Featuring a self-priming design and built-in check valve, it efficiently handles fresh, potable, and marine water with a maximum pressure of 55 PSI. The pump’s rugged polypropylene body and Santoprene diaphragm ensure durability, while the thermal protector prevents overheating for long-lasting performance.
Ideal for camping, boating, or off-grid water systems, this electric pump operates quietly at 60–140°F and includes a pressure switch for automatic activation. With a ½-inch NPT inlet/outlet, it’s compatible with standard plumbing connections. The pump delivers consistent flow rates up to 4 GPM, making it a versatile solution for freshwater supply needs.







