Jabsco Par-Max HD3 Heavy Duty Water Pressure Pump - 12V - 3 GPM - 40 PSI

The Jabsco Par-Max HD3 Heavy Duty Water Pressure Pump is purpose-built for vehicle and marine auxiliary systems where reliable, consistent water delivery is essential. Whether you're upgrading a motorhome freshwater system, installing deck wash capabilities on a boat, or adding pressurized cooling loops to a high-performance engine bay, this 12-volt pump delivers 3 GPM at 40 PSI—enough flow to handle washdown duties, coolant circulation, or emergency systems without sacrificing power draw from your vehicle's electrical infrastructure.

Designed for sustained operation in demanding environments, the Par-Max HD3 is the go-to choice for mechanics and fabricators who demand durability over throwaway components. Engineered with a robust internal design, the Jabsco Par-Max HD3 uses a self-priming diaphragm mechanism that maintains steady pressure delivery even when intake lines are partially air-locked—critical when working with gravity-fed tanks or low-suction scenarios.

The 40 PSI maximum pressure rating provides adequate head for multi-outlet distribution or elevated delivery points, while the 3 GPM flow rate balances amp draw at full load against real-world cooling and washdown requirements. A compact footprint of 6 x 5 x 15 inches and lightweight design at 6.95 pounds make installation flexible in confined engine bays, under-chassis mounts, or tight RV utility cabinets—no bulky external plumbing necessary. Experienced fabricators and fleet mechanics rely on this pump for its efficiency and reliability.