I do not not what model my Valliant boiler is but it is displaying F22 Error. There are no taps as such under the boiler but two matching knobs on two pipes. But when you turn these water starts to drip out. There is a pressure guage that is showing Zero so I presume pressure is the problem but cannot find where to let in more water.
Most recent Vaillants have internal filling loops (except for the Ecotec pro), but as you can't identify your model, it makes it a bit difficult to be more specific.
If you have an external filling loop, it will look something like the diagram on the link
Thank you for your response but these are solid brass pipes and do not look like hoses at all. It is a wall mounted boiler and thes pipes are at the bottom of the boiler along with the gas intake pipe. Am I looking in the right place?
Sue E
January 2011
If the two matching knobs on the pipes have a silver (braided) hose attached to them, you're in the right place to top the boiler up.
If the leak is minor (dripping out of the braided hose ends), catch the water in a bowl or similar while you re-pressure the boiler until it reaches at least 1bar, then turn the knobs off. The leak through the hose ends will be minor and will stop when the hose has emptied.
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