Boiler leak following some plumbing ...

[Gavin77]

Evening all.
Was doing a bit of plumbing on the hot water this morning. Due to location, i ended up removing the hot water outlet pipe from the boiler (worcester 28CDi combi approx 2002). After finishing and turning water back on, I had water ****ing out everywhere, not from the new plumbing, but from the boiler.

Upon a closer inspection, it appears to be coming from the water to water heat exchanger on the hot water outlet side. Its a pig to see, but the leak appears to be coming from where the heat ex meets the outlet pipe (see arrow in photo) rather than the exchanger itself.

Any ideas how to fix? I am struggling to even see how this pipe is connected to the heat ex without dismantling it. It almost looks like a push fit? What seals it? an o-ring?

Have I just been unlucky in that unscrewing the hot water pipe has applied a twisting force on this connection which has caused the leak.

https://www.flickr.com/gp/136927743@N06/Zp41T6
https://www.flickr.com/gp/136927743@N06/042W4f

 

[Dan Robinson]

Heat exchanger needs to come out and new orings fitted.


Shyte design on a mediocre boiler. But probably the best Wooshitter Botch have come up with for a good while.

 

[Gavin77]

Thanks for the info Dan. Thought it might be. Anyway, that's much better than needing a new heat ex.
Are these o rings a custom size, or am i likely to be able to pick them up from a diy shed? Guess I'll find out soon enough

I didnt choose the boiler, it was here when i moved in

 

[Dan Robinson]

Not sure if they're an of size, but the pack is readily as available.

 

[Corgigrouch]

Just make sure that the unions are meticulously clean and assemble with a smear of silicone grease

 

[Gavin77]

Just to follow up. orings replaced, leak fixed and the nagging has now reduced back to normal levels
Cheers for the advice guys.