Opuscm wrote:
I have a Vaillant combi bolier (about 10 years old) with the pressure
guage jumping to the max all the time. I have to use the pressure
release tap to release the excess water once every week to every two
days! I know the pressure represents the amount of water store inside
the boiler, so is it a problem with my top-up tap that slowly letting
excess water into the boiler or there's something else?

Thanks for any help or suggestions.


Could be the tap letting water in.

Try post to:
UK.D-I-Y



Jim