Vaillant Combi Boiler

Vaillant combi boiler models, guide, comparison, parts, manual, drawings, help

Vaillant combi boiler leaking pipes

Hi Folks

I am having a bit of a problem with leaking pipes around my combi boiler. What should I do?


Hi Dave,

A leak in the pipes can cause the whole boiler to stop operating. This means one of the pipes was punctured or poorly installed and it will also release a hissing sound when the boiler is on and being used. The pipework may need to be replaced but for a temporary fix, you will need to close the cold water stop valve that connects between the draw-offs and the boiler.

The Vaillant boiler does not come with a cold water stop valve but it was probably provided and installed when installing the boiler. The boiler won’t operate as long as the water is stopped. Contact a heating specialist company to check the pipes and maintain the problem.

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