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PostPosted: Sat Aug 12, 2017 10:46 am 
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Hi,
We had a new boiler installed in our garage and now see that water leaks from the condensate drain on to the garage floor.
Looking at the picture, the white drain pipe from the boiler feeds into a larger bore black pipe which, in turn, empties into the drain of the shower which is next door. This empties into a soil pipe from the toilet and a wash basin in the same bathroom, and then out to the main foul drain outside.
The problem is, I think, that the upper end of the black pipe shown is roughly at the same level as the shower tray next door and I believe that whenever we have a shower some water feeds back up the black pipe and overflows to the floor area shown as wet in the photograph.
My question is, could the larger bore black pipe be extended much higher up the white pipe, preferably to the area which falls vertically?
I'm not sure what the regulations here are, other than there must be a vent somewhere along the condensate drain pipe.
Thank you for any help and advice.


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PostPosted: Sat Aug 12, 2017 11:58 am 
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If the pipe tee's into the waste after the shower trap you have an open end in the garage which will lead to ingress of sewer smells and possibly rodents. If that's the case it's badly installed.

The easiest fix would be to get a compression coupling and a short length of pipe to extend the black pipe almost as far as the vertical condensate pipe then fit a washing machine standpipe and drop the condensate into that to provide a trap.

Personally I would call the fitter back as it's not right! :salute:

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PostPosted: Sat Aug 12, 2017 2:15 pm 
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Thanks Razor.
It is teed in above the shower trap, fortunately. Probably why the water runs backwards for a short time.
No sewer smells and definitely no rats thankfully, at least I haven't seen any!

Update: I have now had the fitter come back and he has extended the black pipe upwards by a couple of feet towards the boiler. So far, it seems to be OK.

Thanks for your advice.


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PostPosted: Mon Aug 14, 2017 9:34 pm 
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Depending on the type of trap in your boiler, it may or may not be a sealed pipe.

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