Jabsco Par-Max HD4 Heavy Duty Water Pressure Pump - 12V - 4 GPM - 60 PSI

The Jabsco Par-Max HD4 Heavy Duty Water Pressure Pump is a 12V, 4 GPM marine and mobile application pump engineered for sustained high-pressure delivery up to 60 PSI. Built with a wider diameter motor, powder-coated shell, and cast aluminum endbells and lower housing, this heavy-duty configuration delivers exceptional durability in demanding saltwater, off-road, and tactical vehicle environments where standard pumps fail under continuous load.

Rated at 4 gallons per minute with a 60 PSI maximum operating pressure, this pump provides reliable flow for washdown systems, fire suppression, decontamination, and water transfer on vessels, expedition vehicles, and field operations. The 12V DC configuration integrates seamlessly into vehicle electrical systems without requiring dedicated power infrastructure. Compact dimensions (6 x 6 x 15 inches) and a weight of 7.85 lbs allow for discrete mounting in tight engine bays, cargo compartments, or below-deck installations. Cast aluminum construction resists corrosion in harsh salt-air environments while the reinforced motor housing handles thermal stress from prolonged operation.

This pump suits maritime patrol craft, remote tactical bases, emergency response vehicles, and off-grid field operations requiring self-contained water systems. The 4 GPM / 60 PSI specification balances pressure adequacy for effective water delivery against power draw constraints inherent to 12V platforms. Par-Max HD4 models are preferred over standard configurations when mission profiles demand extended operating cycles, higher ambient temperatures, or corrosive environmental exposure. Part number Q401J-118S-3A ensures proper OEM compatibility and warranty recognition across Jabsco service networks.