Camper van conversion water pumps deliver pressurised water systems for DIY van builds, with options including submersible, diaphragm and pressure pumps from leading brands. These 12V pumps range from basic submersible units like Whale and Reich models to sophisticated diaphragm systems from Shurflo and SHURflo that provide constant pressure water supply. Popular choices include 10-25 litre per minute submersible pumps for simple installations, and pressure-activated diaphragm pumps for full plumbing systems with hot water heaters and multiple outlets. Most pumps operate at 12V DC with power consumption between 3-8 amps depending on flow rate and pressure requirements.
Installation varies significantly between pump types and affects system complexity and performance. Submersible pumps sit directly in fresh water tanks requiring only 12V power connections and hose attachments, making them ideal for basic conversions with microswitch taps. Diaphragm pumps need mounting locations, inlet strainers, pressure switches, and often accumulators to reduce cycling noise and extend pump life. Popular models like the Shurflo Revolution 4008 include built-in pressure switches that automatically start pumps when taps open and stop when pressure reaches preset levels, typically 30-60 PSI depending on system requirements.
System design determines pump selection, with submersible units suitable for simple cold water systems whilst pressure pumps enable full hot and cold water installations. Diaphragm pumps provide consistent pressure for showers and multiple outlets but require more complex installation with pressure switches, accumulators and bypass valves. Flow rates vary from 8-25 litres per minute, with higher flow pumps consuming more battery power but delivering better user experience. One consideration is that pressure pumps cycle frequently without accumulators, creating noise and reducing pump life, whilst submersible pumps only run when switches activate but provide less consistent water pressure.
-32197.webp)
The Flojet 30psi on board automatic self priming water pump, which is
(20 reviews)
Frequently Asked Questions
What's the difference between submersible and diaphragm water pumps?Submersible pumps sit in the water tank and work with microswitch taps, running only when taps are turned on. Diaphragm pumps mount externally and maintain constant system pressure using pressure switches, automatically starting when pressure drops and stopping at preset levels. Submersible pumps are simpler to install whilst diaphragm pumps provide better water pressure for showers and multiple outlets.Why does my water pump keep cycling on and off when taps are closed?Continuous cycling indicates a water leak or air leak in the system. Check all faucets, connections, and the toilet for dripping water. Air leaks typically occur at pump inlet connections or through damaged strainers. Test by disconnecting the pump outlet and plugging it - if cycling stops, the leak is downstream in your plumbing system rather than the pump itself.How much power do 12V water pumps consume?Most 12V water pumps draw 3-8 amps when running, consuming approximately 36-96 watts. A typical 3-minute dishwashing session uses about 3 watt-hours of battery power. Higher flow rate pumps like 25L per minute models consume more power at around 70 watts. Submersible pumps generally use less power as they only run when needed, whilst pressure pumps cycle more frequently.Do I need a pressure switch and accumulator with my water pump?Diaphragm pumps require pressure switches to automatically control operation, whilst accumulators are optional but recommended. Accumulators reduce pump cycling, extend pump life, decrease noise, and provide smoother water flow. Set accumulator pressure to 30 PSI for optimal performance with most 12V pumps. Submersible pumps don't need pressure switches as they work with microswitch taps.Why am I getting sputtering water and air from my taps?Sputtering indicates air in the system, usually from air leaks at pump connections or damaged inlet strainers. This commonly occurs after winterisation if systems weren't properly drained. Check the pump inlet strainer for cracks, ensure all connections are tight, and purge air by running all taps for several minutes. The pump may also be drawing air through loose hose clamps or damaged seals.What flow rate do I need for a camper van water pump?Aim for 11-13 litres per minute (3-3.5 GPM) for adequate flow for washing dishes and showering whilst remaining water-efficient. Basic washing requires 8L per minute minimum, whilst comfortable showers need 12L+ per minute. Higher flow pumps like 19-25L per minute models provide excellent pressure but consume more battery power and may require larger electrical systems.
© Leisureshopdirect Ltd - 2004 . All rights reserved.
