Combined rainwater and soil stack?

Joined
13 Nov 2021
Messages
4
Reaction score
0
Country
United Kingdom
Hi, we have moved our upstairs bathroom so need to put a new soil stack on the outside wall. In the place where we want to put it is a rainwater pipe with a "bucket style" opening at the top, (sorry I don't know the correct term), because it is a flat-roof property so it catches the water from the gully on the roof into the bucket type opening and goes down the pipe.

Our rainwater and sewage all join to the same area underground, so would it be possible to combine our rainwater and soil stack into one pipe? Rather than having that rainwater pipe plus a new soil stack pipe next to it too.

So basically we want to replace the rainwater pipe with a soil stack with the "bucket style" opening on top. So any smells come out of the "bucket" above the windows, but also the rainwater still flows into it from the roof. So both rainwater and soil will go down the one pipe and under the ground.

Is this pipe combo allowed? Or do they have to be kept separate above ground?

Thank you very much for any help.
 
Sponsored Links
Joined
3 Feb 2008
Messages
7,663
Reaction score
1,860
Location
Northamptonshire
Country
United Kingdom
'Bucket' is technically termed as a 'Hopper' for Plumbing purposes.

It depends, basically the open end of a soil stack needs to terminate at a suitable point away from any openings into the building, (e.g. Window, skylight, vent), to prevent foul odours getting into the property. If there are no openings into the building hear to the location of the hopper, then you may get away with putting the rainwater into it. You can get a larger hopper suitable for use with 110mm pipe.

Normally would say No, as a pitched roof with have ventilation into the eaves, a flat roof wont, so you may be ok.
 
Sponsored Links
Top