Jabsco Water Pressure System Pumps

Jabsco's Legacy in Marine Water Pressure Systems

For over eight decades, Jabsco has been engineering reliable solutions for marine water systems, and their expertise shines brightest in their comprehensive range of water pressure system pumps. Jabsco's Par-Max range of freshwater pressure pumps is designed to provide years of satisfactory service in marine applications both large and small, making them the preferred choice of leading boat builders worldwide.

The Par-Max Series: Industry-Standard Performance

Jabsco's pressure-controlled diaphragm pumps provide boat owners with a freshwater system that's easy to use, accommodating 1-6 GPM and perfect for vessels with 1-5 outlets. The Par-Max lineup represents decades of refinement in diaphragm pump technology, delivering on-demand water pressure that activates automatically when a faucet opens and shuts off when system pressure builds. These pumps are simple, quiet, easy to maintain, and designed for vessels requiring smooth flow, on-demand operation.

Heavy Duty Innovation for Demanding Applications

For vessels with higher flow requirements or more complex plumbing systems, Jabsco's Par-Max HD (Heavy Duty) models include a wider diameter motor with a powder coated shell, cast aluminum end bells and lower housing to improve pressure capability and life. Available in configurations up to 6 GPM (23 LPM) and 60 PSI (4.1 BAR), these pumps deliver exceptional performance. The HD series features enhanced durability through upgraded materials and construction, ensuring reliable operation even under sustained high-pressure demands.

Built-In Technology Advantages

Modern Jabsco water pressure pumps incorporate intelligent design features that set them apart from conventional options. Many models include an integrated bypass module which reduces cycling and provides smoother flow, eliminating the pulsing that can occur with basic pressure switches. The Par-Max 3.5 offers smooth flow up to 3.5 GPM and is self-priming from dry up to 2.4m (7.8 feet), meaning installation flexibility and reduced priming issues during initial setup or after winterization.

Marine-Grade Construction and Reliability

Jabsco constructs these pumps with polypropylene housings, Santoprene diaphragms, and EPDM check valves—materials specifically chosen for corrosion resistance and longevity in marine environments. The pumps can run dry without damage, a critical safety feature that prevents catastrophic failure if the water supply is temporarily interrupted. Whether delivering water to the galley, head, shower, or multiple outlets simultaneously, these pressure systems maintain consistent performance in both hot and cold water applications.