Johnson Pump 5.0GPM Flow Master Variable Flow Pump - 24V

The Johnson Pump 5.0GPM Flow Master Variable Flow Pump – 24V is a five-chamber positive displacement diaphragm pump engineered for pressurized water delivery in closed systems found in marine vessels, recreational vehicles, and specialized automotive applications. This variable-flow design maintains consistent pressure while automatically adjusting output based on demand, eliminating the need for an accumulator tank in many installations.

Rated at 5.0 gallons per minute, the Flow Master pump features a digital controller that regulates water flow smoothly across varying pressure conditions. The variable-flow technology allows for flexible mounting configurations without requiring supplementary pressure storage, reducing system complexity and installation footprint. At 7.2 lbs and measuring 7 x 6 x 11 inches, the pump is compact enough for tight engine compartments and tight RV plumbing spaces while delivering reliable performance in both freshwater and saltwater environments common to marine applications.

This pump suits boat owners, RV enthusiasts, and automotive builders who need dependable on-demand water pressure for washdown systems, cooling loops, or freshwater distribution. The 24-volt electrical specification makes it compatible with standard marine and RV electrical architectures. Johnson Pump's positive displacement design ensures steady flow characteristics across load variations, making this unit a practical choice for applications where pulsation-free delivery and simplified pressure management are priorities.

The Flow Master series represents the mid-range capacity option within Johnson Pump's variable-flow lineup, positioned for systems that require moderate to heavy-duty intermittent water circulation without the installation complexity of traditional pump-and-accumulator setups.