Water pump in your campervan: how to keep the water system running reliably

Summary: campervan water pump at a glance

• The water pump provides running water throughout your campervan
• There are submersible pumps and pressure pumps
• Noise, pressure and power consumption differ between types
• Regular maintenance prevents breakdowns
• Water points and service stations are essential on the road

What does a water pump do in a campervan?

The water pump draws water from the water tank and delivers it to the tap, shower and toilet. As soon as you open a tap, the pump kicks in and builds pressure in the system. Read more about the water tank in your campervan.

Types of water pumps for campervans

Submersible pump

A submersible pump sits inside the water tank and pumps water as soon as you open a tap.

Characteristics

• Simple and affordable
• Relatively quiet
• Limited pressure and capacity

Suitable for smaller campervans and straightforward use.

Pressure pump (diaphragm pump)

A pressure pump sits outside the tank and builds pressure in the pipe system.

Characteristics

• Consistent water pressure
• Suitable for showers and multiple tap points
• Slightly noisier

These pumps are popular in larger campervans and van conversions with a shower.

What to look for when choosing a water pump

Capacity and pressure

• Capacity is expressed in litres per minute
• Pressure is usually measured in bar

For normal use, 7 to 10 litres per minute is usually sufficient.

Noise and vibration

Pay attention to mounting and dampening to keep noise levels down.

Power consumption

Most water pumps run on 12V and use relatively little power, but they do count towards your energy budget. Read more about managing power efficiently in our guide on solar panels for campervans.

Installing a water pump

When installing, it is important to:

• secure all hoses properly
• use a non-return valve
• prevent air from entering the system

After fitting, bleed the system by briefly opening all taps.

Maintenance and winterising

Good maintenance extends the pump's lifespan:

• clean filters regularly
• check hoses and connections
• drain the pump before frost

Common problems and solutions

Pump keeps running

Often caused by:

• a leak in the system
• air in the pipes
• faulty pressure switch

No water or low pressure

Check:

• filters
• pipes
• the water tank level

Frequently asked questions about water pumps in campervans

What is better: a submersible pump or a pressure pump?
That depends on your campervan and comfort needs. Pressure pumps deliver more consistent water pressure.

How much power does a water pump use?
Relatively little, and typically only while in use.

Why does my water pump keep running?
Usually caused by a leak or air in the system.