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Johnson Pump

476746

Johnson Pump WPS 5.2 12V – Pressure Water System

The Johnson Pump WPS 5.2 12V pressure water group provides stable and quiet flow for onboard freshwater systems. Equipped with a 150 W motor and a 2.5 m suction lift, it includes a bypass valve for constant pressure.

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£318.26 GBP

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Prices exclude import taxes. DAP delivery: import taxes are paid on delivery.

Available in stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

Diaphragm Material	Santoprene
Duty Cycle	Intermittent, max. 20 min
Fastener material	Stainless steel
Max Ambient Temperature	60 °C
Max Liquid Temperature	50 °C
Max Suction Lift	2.5 m
Motor power	150 W
Operating voltage	12 V DC
Pump Body Material	Nylon/Polypropylene
Weight	2 kg

Detailed description

Designed for freshwater systems on board, the Johnson Pump WPS 5.2 12V pressure water pump provides reliable and steady water supply. It features a 150 W (12V DC) motor with built-in thermal protection, offering a maximum suction height of 2.5 m.

Design and materials

The pump body is made of nylon and polypropylene, while the valve housing is made of polypropylene and polyamide. The valves are made of Santoprene/EPDM and the diaphragm is made of Santoprene, ensuring good resistance to marine environments and fluids. The fasteners are made of stainless steel, contributing to the overall durability. This pump is designed for intermittent operation, with a maximum duty cycle of 20 minutes.

Features and installation

The Johnson Pump WPS 5.2 12V stands out for its quiet operation. It supports a maximum liquid temperature of +50°C and a maximum ambient temperature of +60°C. Available connections include 3/8" BSP for 1/2" hose (ø 13 mm) and 1/2" BSP for 3/4" hose (ø 18 mm).

Documentation

Type	Nom
	FR-EN - Manuel d'instructions - Johnson Pump WPS 5.2 12V – Groupe d'eau sous pression
	FR - Fiche technique Johnson Pump - 10-13406-07
	EN - Fiche technique Johnson Pump - 10-13406-07

Expert opinion

« Technical analysis of the Johnson Pump WPS 5.2 12V pressure water pump »

The Johnson Pump WPS 5.2 12V pressure water pump is a reliable solution for freshwater systems on mid-sized recreational vessels. Its 2.5 m suction capability is an asset, allowing installation flexibility where the pump can be positioned slightly above the water tank level.

The added value of this model lies notably in its integrated bypass valve. This technical feature is essential for reducing pump cycling, ensuring more stable water pressure at the taps and extending the lifespan of internal components by minimizing wear. This design also contributes to quieter operation, a notable advantage in a marine environment.

From a system integration standpoint, the choice of materials such as nylon/polypropylene for the body and stainless steel for the fasteners, combined with Santoprene/EPDM valves, ensures good robustness against marine environment constraints. However, it is imperative to respect its intermittent duty cycle (maximum 20 minutes), which makes it suitable for standard domestic use rather than intensive continuous pumping applications. Maximum temperatures of +50°C for the liquid and +60°C for the ambient air define a usage framework that must be considered when selecting the installation location to avoid excessively hot and unventilated compartments.

The electrical installation must comply with the SS-EN ISO 10133 standard, and the use of a 10 A fuse, imperatively flame-resistant, is crucial for onboard safety. Finally, special attention must be paid to freeze protection: in freezing temperatures, the system must be fully drained to prevent damage to the pump and piping.

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Johnson Pump WPS 5.2 12V – Pressure Water System

£318.26 GBP

Frequently Asked Questions

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What is the motor power of the Johnson Pump WPS 5.2 12V water pump unit?

The Johnson Pump WPS 5.2 water pump group is fitted with a 150 W motor. It operates on 12 V DC and includes thermal protection.

What is the maximum suction height of this pump?

The maximum suction height for the Johnson Pump WPS 5.2 model is 2.5 meters (8.2 ft).

What materials are used for the pump body and valves?

The pump body is made of nylon and polypropylene. The valve housing is made of polypropylene and polyamide, while the valves are made of Santoprene/EPDM and the diaphragm is made of Santoprene. The fasteners are made of stainless steel.

What is the maximum temperature of the liquid the pump can withstand?

The maximum temperature of the liquid that the Johnson Pump WPS 5.2 water pump can handle is +50°C (+120°F).

What is the maximum ambient operating temperature for the pump?

The maximum ambient temperature in which the pump can operate is +60°C (+140°F).

Is the Johnson Pump WPS 5.2 12V water pump group quiet?

Yes, one of the characteristics of this water maker is its quiet operation.

What is the recommended duty cycle for this pump?

The Johnson Pump WPS 5.2 water pump group is designed for intermittent operation, with a maximum duty cycle of 20 minutes.

Is there an integrated thermal protection in the motor?

Yes, the 150 W motor is fitted with an integrated thermal safety cut-out for enhanced protection.

What is the advantage of the integrated bypass valve?

The integrated bypass valve reduces pump cycling when a valve is opened or closed, ensuring a more stable and consistent water flow.

How to prevent freeze damage to the plumbing system and pump?

To prevent damage from freezing temperatures, it is essential to drain the water storage tank and purge the system if water is not used during a freeze.

What electrical installation standards must be complied with?

The pump must be installed in accordance with standard SS-EN ISO 10133 (Small craft – Electrical systems – DC installations operating at extra-low voltage).

How to start the system after installing the pump?

After installing the pump, to start the system you must:

Fill the water tank.Open a tap.

Is the Johnson Pump WPS 5.2 water pump suitable for a marine environment?

Yes, construction materials such as the nylon/polypropylene body, polypropylene/polyamide valve housing, Santoprene/EPDM valves, Santoprene diaphragm, and stainless-steel fasteners are selected for their resistance to the marine environment.