Hi
My (very) old Vaillant seems to have sprung a leak. When the hot water is running there's a leak at a nut that drips about once every 10 seconds. Here's a pic:
Thanks Warren
To do this job you will need a fibre washer similar in size to 3/4" bath tap one but a bit wider. Turn off the cold water supply (on boiler or elsewhere) undo nut, clean flanges, insert new washer (with liquid ptfe, or silicone grease if you like) and tighten-up, but water back on, check for leaks, run hot water, check again.
By the book if you get someone in they need to be registered but in practice the risk is minimal if they stick to doing the job you ask and nothing else.
Sorry to make another post.
This boiler is not less than 20 years old. This is an example to those people who claim [all] combi boilers fail in under 10 years.
However, you should note that the poster felt obliged to virtually apologise for having such an ancient boiler ! ;-)
Andy
My Vaillant 242E was 20 years old when I removed it (still working)
Parts replaced during this time were the fan and the secondary heat exchanger
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