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Leaking condensate pipe

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20 Oct 2025
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I recently had a new boiler fitted but the engineer has left me with a leaking condensate pipe, the condensate is dripping down an external brick wall. I contacted the engineer and his reply was “glue it” should I do this myself?
 

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Looking at that pic it is leaking where the elbow joins the pipe going through the wall. Putting gorilla tape over the insulation wont stop that and condensate is slightly acidic so it could damage the bricks if left. The joint needs to be remade and as the join where it is leaking is slightly inside the wall that isn't quite as easy as it sounds. I would insist that the guy comes back and sorts it out. Bottom line is that it should not have been left like that.
 
I am not plumber...

A while ago, a customer had a leaking joint on their condensate pipe, it was eating the concrete slab below. I sealed the elbow with CT1 (a "silicone-esque product). When I last checked (a year later), the join was OK.
 
I recently had a new boiler fitted but the engineer has left me with a leaking condensate pipe, the condensate is dripping down an external brick wall. I contacted the engineer and his reply was “glue it” should I do this myself?

Nope - if you paid him to install the boiler, you should expect him to complete the job fully.
 
I recently had a new boiler fitted but the engineer has left me with a leaking condensate pipe, the condensate is dripping down an external brick wall. I contacted the engineer and his reply was “glue it” should I do this myself?
Maybe more comments if you posted in Plumbing and Central Heating
 
I’ve tried to get him to come and repair it but he doesn’t seem interested, his answer was ok won’t do any damage I’ll sort it sometime soon but that was over a week ago.
 
I’ve tried to get him to come and repair it but he doesn’t seem interested, his answer was ok won’t do any damage I’ll sort it sometime soon but that was over a week ago.

Log your attempts to get him back, phone calls/emails. If he doesn't fix it within a reasonable amount of time, then tell him you will engage another Gas Safe engineer to complete the job (it needs someone GS), and will expect him to pay the costs. If he refuses, you can take out a small claim in the court, to recover the costs, as well as reporting him to Gas Safe, for them to investigate.
 

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