Dripping Vaillant combi boiler

[wozza]

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:

've tried tightening the nut very slightly but it doesn't seem to make a difference. I assume it's a washer inside that's damaged or something. Is this something that I (a non-plumber!) can try to fix or do I need to get a professional in, and do they need to be Corgi registered to look at this bit?

Thanks Warren

[Ed Sirett]

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.

[Ed Sirett]

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.

[Andy Cap]

However, you should note that the poster felt obliged to virtually apologise for having such an ancient boiler ! ;-)

Andy

[geoff]

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