12v/55psi/15Ltr Seaflo Series 42 Water Pump - Retail Packed With Fittings
12v/55psi/15Ltr Seaflo Series 42 Water Pump - Retail Packed With Fittings
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The SEAFLO Series 42 12V 15L/min 55PSI Water Pump is a high-performance, self-priming diaphragm pump designed for caravans, motorhomes, campervans, boats and van conversions. Delivering a maximum flow rate of 15 litres per minute and operating at up to 55 PSI (3.8 bar), this powerful water pump is ideal for pressurised fresh-water systems requiring reliable water delivery to taps, showers and other onboard outlets.
Featuring a four-chamber diaphragm design, the Series 42 pump provides a strong, consistent water supply with an integrated pressure switch that automatically starts and stops the pump as water is required. Its self-priming capability allows flexible installation, while its ability to run dry without immediate damage provides additional protection during normal operation.
Supplied retail packed with connection fittings, this pump offers a convenient solution for replacing an existing water pump or installing a new pressurised water system. Its compact design and rubber mounting feet help reduce vibration and make installation easier in confined spaces.
Features
• 12V DC Operation – Suitable for leisure vehicle and marine electrical systems
• 15 Litres Per Minute – Maximum flow rate for supplying multiple water outlets
• 55 PSI Pressure – Maximum pressure rating of approximately 3.8 bar
• Four-Chamber Diaphragm – Designed to provide reliable water delivery
• Automatic Pressure Switch – Starts and stops the pump according to water demand
• Self-Priming Design – Allows installation above the water supply tank within the specified suction lift
• Run-Dry Capability – Designed to tolerate occasional dry running without immediate damage
• Rubber Mounting Feet – Help reduce vibration and operating noise
• Retail Packed With Fittings – Supplied with connection fittings for installation
• Versatile Applications – Suitable for caravans, motorhomes, campervans, boats and van conversions
Specifications
• Brand: SEAFLO
• Series: 42
• Voltage: 12V DC
• Maximum Flow Rate: 15 Litres Per Minute
• Pressure Rating: 55 PSI (3.8 bar)
• Pump Type: Four-Chamber Diaphragm
• Pressure Switch: Automatic
• Priming: Self-Priming
• Run-Dry Capability: Yes
• Mounting: Rubber Mounting Feet
• Packaging: Retail Box
• Supplied With: Water Pump and Connection Fittings
Installation Information
The pump is designed to be connected to a suitable 12V DC electrical supply and installed between a fresh-water tank and the vehicle's pressurised water system. An appropriate inlet strainer is recommended to prevent debris from entering the pump, while an accumulator tank can help reduce pressure fluctuations and frequent pump cycling.
Please Note: Before installation, check that your existing pipework, taps, water heater and other plumbing components are suitable for the pump's 55 PSI pressure rating. Some caravan and motorhome water systems are designed for significantly lower operating pressures and may require a lower-pressure pump.
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Frequently Asked Questions
The SEAFLO Series 42 is designed for pressurised water systems in caravans, motorhomes, campervans, boats and van conversions. Its 15 litres per minute maximum flow rate makes it suitable for supplying taps, showers and other compatible water outlets where a higher-flow water pump is required.
Yes. The pump features an integrated automatic pressure switch that activates the pump when water pressure drops as a tap or shower is opened. When the outlets are closed and the system reaches the pump's shut-off pressure of 55 PSI, the pump automatically stops.
Yes. The four-chamber diaphragm design allows the pump to tolerate occasional dry running without immediate damage. This is useful when initially priming the system or if the water tank becomes empty. However, prolonged unnecessary dry running should be avoided.
The 55 PSI (3.8 bar) rating refers to the pump's shut-off pressure rather than a constant delivery pressure. The actual operating pressure will vary according to water demand and system restrictions. It is important to ensure your pipework, water heater and fittings are suitable for this pressure.
An accumulator tank is not normally essential because the Series 42 features internal bypass technology to help reduce pump cycling. However, adding a compatible accumulator may further smooth water flow and reduce frequent starting and stopping in certain installations.
Yes. The pump is self-priming and can draw water from a tank positioned below the pump, provided the installation remains within its rated suction lift. SEAFLO specifies a self-priming capability of approximately 1.8 metres under suitable conditions.
The pump operates from a 12V DC electrical supply. SEAFLO lists a maximum current draw of 14A for the 15.1L/min, 55PSI short Series 42 model, so the wiring, fuse and electrical supply must be suitably rated. Always follow the installation instructions supplied with your pump.
This version is supplied retail packed with connection fittings for installation. The pump uses 1/2" male NPT inlet and outlet ports, with suitable adaptors allowing connection to compatible water pipework. Check the fittings included in your particular package to ensure they match your plumbing system.
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