Plumbing

How best to seal condensate pipe going through brick and mortar wall

Anonymous user 16 March 2024 - 3.32 PM

I had a boiler fitted 2 years ago with a condensate pipe going from the boiler (inside an airing cupboard) through an external wall to the drain outside. The other day I found the cupboard soaked with an inch of water. Doesn't seem to be the pipe itself leaking because it only happens when it rains, and the mortar where the pipe enters the internal wall is wet. There appears to have been an attempt to seal the pipe using silicone gel on the outside - but there are gaps in that seal (there's not much room between the pipe and the wall). I purchased some basic silicone gel but I'm worried it won't adhere well or make a permanent seal on mortar / brickwork, and that would be made worse if I can't fully dry out the mortar. Is silicone gel OK - is there a better product I could pick. The pipe doesn't seem to move so it would be almost impossible to fit a rubber gasket without removing the pipe and making the hole bigger. What should I do? I'm not particularly good at diy, but I don't want to spend a fortune on this!