How to build a stable water system in a boat or camper

A good water system is not just about the pump. It's about the entire setup. Here, I'll show you how to build a stable system that provides good pressure, fewer problems, and a solution that simply works.

A stable system is built like this: Tank → Filter → Pump → (Accumulator Tank) → Water installation

1. Start with the water tank

Everything starts with your water tank. It must be clean, correctly installed, and positioned so the pump can easily draw water.

• Avoid excessively long suction hoses
• Ensure a tight connection
• Ideally, place the pump close to the tank

2. Always use a filter before the pump

I always recommend installing a filter before the pump. This protects the pump from dirt and significantly extends its lifespan.

3. Choose the right pressure water pump

The pump must suit your needs. A pump that's too small will result in poor pressure – one that's too large will lead to unnecessary power consumption.

• 7–10 L/min → small systems
• 10–15 L/min → general use
• 15–20+ L/min → shower and high comfort

4. Consider an accumulator tank (important)

An accumulator tank makes a huge difference to comfort. It provides a consistent water flow and reduces pump start/stop cycles.

5. Use the correct hoses and fittings

Many problems are caused by hoses that are too small or poor connections.

• Use correct dimensions (not hoses that are too small)
• Ensure tight connections
• Avoid kinks in hoses

6. Correct pump installation

The pump must be mounted stably and ideally with vibration dampening.

• Secure mounting
• Rubber feet or dampening
• Easy access for service

Typical mistakes I see again and again

• Pump too small
• No filter before the pump
• Incorrect hoses
• Poor installation
• Expectation of excessively high comfort

This is what a good system looks like

Are you in doubt?

If you are in doubt about how to build your system, I'm happy to help you find the right solution for your boat or camper.