Johnson Pumps 10-25008-03 Aqua Jet II WPS 2.9 GPM 12V Diaphragm Water Pressure Pump

The Johnson Pumps Aqua Jet II WPS is a compact, high-performance five-chamber diaphragm water pressure pump designed for marine, RV, and small vessel freshwater pressure systems. Delivering 2.9 GPM (11 L/min) at 12V DC, with a pressure cut-off of 40 PSI (2.8 bar), this pump provides reliable, consistent water pressure for galleys, showers, and onboard plumbing.

The updated Aqua Jet II generation builds on the proven WPS diaphragm platform with an integrated pressure switch that automatically starts the pump when a tap is opened and shuts it off once demand stops. The five-chamber displacement design dramatically reduces pulsation and noise compared to conventional pumps, even at low flow rates.

Key Features:

• Flow Rate: 2.9 GPM / 11 L/min
• Voltage: 12V DC
• Max Current Draw: 10 Amps
• Pressure Cut-In: 25 PSI (1.7 bar)
• Pressure Cut-Off: 40 PSI (2.8 bar)
• Motor: 85-watt with PP/PPA pump body
• Diaphragm Material: Santoprene
• Valve Material: EPDM
• Port Connection: BSP fittings (includes hose barb adapters)
• Self-priming design for easy installation
• Compatible with both fresh water and salt water
• Integrated automatic pressure switch — no external switch required

For optimal performance and to extend pump life, installation with an accumulator tank is recommended. Always use a PUMProtector inlet strainer upstream of the pump intake. Ideal for shower, galley, and general onboard water pressure applications on boats and RVs.