Water Pressure System Pumps
0 results found
No products match your current filters
Try the following
- Remove some filters to broaden your results.
- Clear the vehicle filter to see all available products.
- Check a different category or manufacturer.
- Browse the top categories below to find what you need.
What Are Water Pressure System Pumps?
A water pressure system pump is the heart of any onboard freshwater setup — whether you're living aboard a cruising sailboat, spending weekends on a powerboat, or outfitting an RV for extended travel. These pumps draw water from an onboard holding tank and pressurize it throughout the vessel's plumbing, delivering consistent flow to sinks, showers, galley faucets, and washdown stations. Without a properly functioning pressure pump, every tap on board relies on gravity or a manual hand pump — a far cry from the comfort modern boaters and RV enthusiasts expect.
How Water Pressure System Pumps Work
Most marine and RV water pressure pumps are self-priming, 12V or 24V DC diaphragm-style pumps that activate automatically when a faucet is opened and water pressure drops below a set threshold. Flow rates typically range from around 1 to 6+ gallons per minute (GPM), with pressure ratings commonly between 25 and 60 PSI. Many installations also incorporate an accumulator tank, which stores a small reservoir of pressurized water to smooth out pump cycling, reduce pulsation at the tap, and extend pump life. As one widely referenced standard, 40 PSI is considered the industry benchmark for most modern onboard water systems.
Key Considerations When Shopping
- Flow Rate (GPM): Match the pump's GPM rating to the number of fixtures on board. A single-outlet system may only need 1–2 GPM, while a multi-fixture boat with a shower, galley sink, and head will benefit from a 4–6 GPM pump.
- Voltage: Confirm whether your system runs on 12V or 24V DC before purchasing.
- Pressure Rating (PSI): Check that all downstream fixtures and hoses are rated to handle the pump's maximum output pressure.
- Self-Priming Capability: Look for pumps that can self-prime from a dry state and run dry without damage — critical for reliability in low-tank situations.
- Accumulator Tank Compatibility: Pairing your pump with an accumulator tank reduces wear and delivers a smoother, less pulsating water flow throughout the system.
- Build Materials: In saltwater environments, corrosion-resistant housings and fittings are essential for long service life.
Top Brands in Water Pressure System Pumps
Jabsco is one of the most trusted names in marine and RV water pressure pumps. Their iconic Par-Max series — available in 12V and 24V configurations with flow rates up to 6 GPM and pressures up to 60 PSI — has become a go-to choice for boat builders and DIY installers alike. Jabsco pumps are known for being self-priming, capable of running dry without damage, and built to withstand the demanding conditions of onboard use.
Heater Craft is a respected marine brand best known for its heating and shower systems designed for towboats, wakeboats, and recreational vessels. Their water pressure pump offerings are engineered to work seamlessly as part of complete onboard shower and washdown systems, making them a practical choice for boaters who want an integrated solution for hot and cold water delivery.