Johnson Pump Aqua Jet WPS 4.0 GPM – 12V – NPT – 2.8 Bar – 10-13406-103

The Johnson Pump Aqua Jet WPS 4.0 GPM Water Pressure Pump System is a high-performance, intelligent freshwater pressure solution designed for boats, RVs, and mobile water systems that require quiet operation and consistent water delivery. Powered by a 12V DC electrical system, this unit delivers up to 4.0 gallons per minute at 2.8 bar (approximately 40 PSI), providing reliable pressure for sinks, showers, and multiple onboard fixtures.

Utilizing variable-speed diaphragm pump technology, the Aqua Jet WPS automatically adjusts pump output based on water demand. This ensures smooth, pulse-free water flow, reduced noise and vibration, and improved energy efficiency. The integrated electronic pressure control eliminates the need for an accumulator tank, simplifying installation while maintaining steady system pressure.

Built with marine-grade, corrosion-resistant materials, the Aqua Jet WPS is engineered for long-term durability in harsh environments. NPT threaded ports allow easy integration with standard plumbing systems, making this pump ideal for both new installations and system upgrades.

Key Features & Performance

• Reliable Operation: This pump is self-priming and can run dry without damage, providing peace of mind if your water tank runs empty.

• Quiet & Smooth: Engineered for silent running and smooth water flow, it minimizes the vibration and noise common in smaller water systems.

• Energy Efficient: With a low power draw of approximately 2.5 to 3 Amps, it is highly efficient and won't rapidly drain your 12V battery.

• Simple Maintenance: The twist-lock and easy-connect system allows for straightforward installation and maintenance without needing specialized tools.

In the Box

• 12V FL2202 Pump Unit: The core diaphragm pump with an integrated pressure switch.

• 3/8" Barb Fittings: Includes an easy connecting system specifically for 3/8" (10mm) hose lines.

• Mounting Base: Vibration-dampening feet to secure the pump and reduce noise.

Technical Specifications

• Flow Rate: 1.1 GPM (4.2 LPM)

• Voltage: 12V DC

• Duty Cycle: Intermittent

• Port Type: 3/8" Barb

• Safety: Do not use in flammable environments (not ignition protected).

Ideal For

✔ Small boats & sailboats freshwater systems
✔ RVs, campers, and caravans freshwater delivery
✔ Off-grid water systems and trailers
✔ Sinks, showers, and galley water pressurization

Why Choose the Johnson Pump Aqua Jet WPS 4.0 GPM?

The Aqua Jet WPS 4.0 GPM delivers residential-style water pressure in a compact, intelligent system. With smooth flow, simplified installation, and durable marine construction, it’s an excellent choice for boaters and RV owners seeking dependable performance without unnecessary complexity.