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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Building Questions >> New drainage https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1434220174 Message started by ckelly0172 on Jun 13^th, 2015, 7:29pm

Title: New drainage
Post by ckelly0172 on Jun 13^th, 2015, 7:29pm

Hi All, appreciate you thoughts on this...

I'm wanting to change my soil drainage to include a soil pipe for my new ensuite which was oringally a roof water fall pipe, that does go into the sewerage. have posted before and proposed after pics, if they make sense. Essentially connect a soil T to existing drainage and then fall pipe trap to the soil T.

Before

After

Thanks
Craig

Title: Re: New drainage
Post by woodsmith on Jun 14^th, 2015, 9:42am

Roof water normally goes into the rainwater system, foul water should have its own sewerage piping and you are not allowed to discharge foul water into the rainwater system. That said there are some houses which have a joint system where the roof water goes into the foul water sewerage system, but this looks like a rainwater only pipe to me. You would need to find out where this water went to be 100% certain but I doubt you can use this for foul water.

Work like this is covered under building control and you would need to get building consent from the local council. They are normally very helpful, unlike planning departments and will be able to advise you on what you can and can't do.

As for what you are proposing, at the bottom of a soil stack you normally have a shallow bend, a rest bend, as this prevents solids from collecting at the bottom of the stack and blocking the pipe. I think what you are proposing would cause you a lot of grief on the future.

Title: Re: New drainage
Post by Lectrician on Jun 16^th, 2015, 4:22pm

Yes, soil stacks do need a swept/rest bend at the bottom, otherwise you get splatter and blockages.