Johnson Pumps 10-25009-03 Aqua Jet WPS II 3.5 GPM 12V Water Pressure System Pump

The Johnson Pumps Aqua Jet WPS II (10-25009-03) is a 3.5 GPM, 12-volt diaphragm water pressure pump engineered to serve as the reliable heart of onboard water systems in boats, RVs, and other recreational vehicles. With a maximum pressure cut-off of 40 PSI (2.8 bar), this pump delivers consistent, household-like water pressure to galleys, showers, and sinks.

Key Features:

• Five-chamber diaphragm design delivers significantly quieter, smoother flow compared to conventional 3- or 4-chamber pumps
• 3.5 GPM (13 L/min) flow rate — ideal for small to medium-sized vessels and RVs
• 12V DC operation with an 85W motor and 10A fuse rating for efficient low-amperage draw
• Integrated automatic pressure switch turns the pump on when a tap is opened and off when closed
• Self-priming capability for easy installation and startup
• Santoprene diaphragm and EPDM valves provide durability and chemical resistance
• Polypropylene/PPA body construction for long service life in fresh and salt water environments
• Compatible with 3/8" NPT / 1/2" hose and 1/2" NPT / 3/4" hose connections

For optimal performance, Johnson Pumps recommends installing this WPS pump with an accumulator tank to further reduce pulsation and cycling, and always using a PUMProtector inlet strainer before the pump intake.