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Thanks for the response and was intending to get back to Vaillant if I could definitely isolate the problem down to the part that was changed. Would this problem therefore definitely be down to a fault with the filling loop and not say the valve where the water is dripping from?

Had the filling tap replaced approx 4 months ago by a senior engineer at Vaillant and then had the boiler serviced a week later by a local firm. 2 days ago noticed that the pressure had gone down to 0.9 and was the first instance that I have had to use it since. It required a bit of force to...

Thanks for all the responses, I guess I will pop along to the opticians. As to the response from mickyg, if you are considering becoming a comedian, can I suggest that you do not give up the day job. :D

A friends glow worm 24cxi has recently been serviced and have noticed a slight difference after the service and wanted to check to ensure that it is not something significant. The Combustion Analyser Test Point on the Flue use to have a glowing pale blue colour emanating from it and after the...

Thanks for the response. Yes the filling tap is turned off and the water only drips when you open the filling tap. Is this what you are referring to when you state the filling loop? Water did not drip when opening this tap in the past as I have had to use it a number of time over the years...

Thanks for the response. Would you know which part is therefore faulty and should I get this fixed at some point?

A friend has a Glow worm 24cxi condensing boiler and recently noticed water leaking at the bottom of the boiler when opening the filling tap. The position of the water appears to be falling from the left side of the boiler when facing it and is approximately a third of the way in from the...

A friend has a Glow-worm 24cxi boiler installed approx 4 years ago. Since then I have used the filling tap on a number of occasions to re-pressurize it. Out of the blue and approx a year ago Glow worm sent a letter offering to come out and replace a component that could cause a leak free of...