Johnson Pump

Johnson Pump (a brand by SPX FLOW) is a leading name in marine, RV, and industrial pumping solutions. They are most well-known for their five-chamber diaphragm pumps, which offer quieter and smoother water flow compared to standard three-chamber models.

Depending on your needs, their lineup is generally divided into Freshwater Pressure Systems and Bilge Management.

Freshwater Pressure Systems

These pumps are designed for galley sinks, showers, and RV water systems.³ They feature integrated pressure switches that turn the pump on and off automatically when you open or close a faucet.

• Johnson Pump Aqua Jet WPS 2.9 GPM: A quiet, self-priming pump ideal for small to medium boats. It uses a five-chamber design to minimize pulsation and noise.

• Johnson Pump Aqua Jet Uno WPS 3.5 GPM: A premium all-in-one system that includes a 2-liter accumulator tank and a strainer. This setup provides even smoother flow and prevents the pump from "cycling" (turning on and off rapidly).

Bilge and Submersible Pumps

For removing water from the lowest part of a boat, Johnson offers high-capacity submersible pumps.

• Johnson Pump Heavy Duty Bilge Pump 4000 GPH: Designed for commercial or large leisure vessels, this 24V pump can move up to 4,000 gallons per hour. It features a liquid-cooled motor and a mechanical shaft seal for extended life

• Johnson Pump Ultima Combo 1000 GPH: An automatic bilge pump that comes equipped with a solid-state Ultima Switch. It uses a cartridge design, allowing you to replace the motor without removing the entire pump housing from the boat.

• Johnson Pump Aqua Void 500 GPH: A compact, high-efficiency pump featuring Dura-Port fittings to prevent stress cracking. It is a non-automatic model, meaning it requires a separate manual or float switch.