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Discuss Condensate external or drill through from garage in the Gas Engineers Forum area at PlumbersForums.net

Matt0029

Gas Engineer
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I'm on a new build the boiler is in the garage. I have the option of drilling straight out with the condensate in to the stack. Or drilling through from the garage to the house to tee in to the kitchen sink waste. So it's either coring out and coming out with that black dot is.
 

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Or coring though to the kitchen sink under the plyth to connect to the kitchen. Waste. If the pictures sort of make sense. What would people think was best please
 

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Kitchen waste it would be for me
 
Yep, internal if I have the choice so you can also stick to mostly 22mm indoors or whatever's most practical to install. Plus you're coring cement block instead of stone.
 
Yep, internal if I have the choice so you can also stick to mostly 22mm indoors or whatever's most practical to install. Plus you're coring cement block instead of stone.

Garage you need to run 32mm so just run it all the way
 
Sure, and in this case as kitchen not fitted and has easy access to outlet but when you haven't and access is limited or it's a mess under the sink that bendy 22mm can be a godsend.
 
The sink waste does go external the stack but it's a tiny external run. An elbow 100mm but of pipe and street elbow. Still best of doing it like this as the kitchen sink would flush it stop it freezing. Sounds logical?
 

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Whatever is easiest mate, I usually like running it internally and keeping it 22mm if I can so the only real aggro is finding where to put the boss on the outlet but if you have no room you have no room so run it to the stack outside.
 

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