Jabsco Par-Max HD5 Heavy Duty Water Pressure Pump - 12V - 5 GPM - 40 PSI - P501J-115S-3A

The Jabsco Par-Max HD5 Heavy Duty Water Pressure Pump P501J-115S-3A is designed to provide powerful and consistent freshwater pressure for larger marine vessels, yachts, RVs, and demanding multi-outlet water systems. With a high flow rate of 5 gallons per minute and a 40 PSI pressure rating, this heavy-duty diaphragm pump delivers reliable water performance for showers, sinks, washdown systems, and galley applications.

Built with a durable five-chamber diaphragm design, the Par-Max HD5 minimizes pulsation and ensures smooth, steady water flow throughout your onboard plumbing system. The pump automatically adjusts to water demand and features a built-in pressure switch for efficient automatic operation.

Its sealed motor and corrosion-resistant materials are engineered to withstand harsh marine conditions, while thermal overload protection enhances safety and long-term reliability. The pump can run dry without damage, making it ideal for marine environments where consistent performance and durability are critical.

Easy to install and service, the Jabsco Par-Max HD5 includes vibration-dampening mounting technology for quieter operation and reduced system noise. Whether upgrading an existing freshwater system or outfitting a new vessel, this heavy-duty pump delivers dependable pressure and high-volume water flow for everyday onboard comfort.

Key Performance Specifications

• Flow Rate: 5.0 Gallons Per Minute (19 Litres Per Minute).

• Pressure Switch: Factory set at 40 PSI (2.8 Bar) cut-out.

• Power: 12V DC operation with an integrated sealed pressure switch.

• Capacity: Effectively serves up to 4-5 outlets simultaneously, including showers, galleys, and washdown faucets.

Construction & Durability

• HD Motor: Features a wider diameter motor with a powder-coated shell and cast aluminum endbells to dissipate heat and improve longevity.

• 5-Chamber Design: The diaphragm uses five chambers to ensure a smoother, more consistent water flow with reduced pulsation.

• Bypass Technology: Includes an internal bypass valve that reduces "pump cycling" (the rapid on/off switching), which results in quieter operation and less wear on the motor.

• Self-Priming: Can pull water from a tank up to 7 feet (2.1 meters) below the pump level.

What’s in the Box?

• Jabsco Par-Max HD5 Water Pump

• (2) 1/2" (13mm) Straight Hose Barb port fittings

• (1) 40 Mesh Quick-Connect Strainer (inlet filter)

• Vibration-dampening mounting feet

Key Features

• Heavy-duty 12V freshwater pressure pump
• High flow rate of 5 GPM
• Delivers up to 40 PSI water pressure
• Five-chamber diaphragm design for smooth flow
• Reduced pulsation and quieter operation
• Automatic pressure-switch controlled operation
• Dry-run capable without damage
• Corrosion-resistant marine-grade construction
• Thermal overload motor protection
• Supports multiple fixtures simultaneously
• Ideal for boats, yachts, and RV water systems
• Vibration-dampening mounting technology

Technical Specifications

WARNING: This product can expose you to chemicals including ANTIMONY OXIDE (ANTIMONY TRIOXIDE) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.

Manufacturer : Jabsco
Manufacturer Part No : P501J-115S-3A
UPC : 671880841948