Drainage Q`s

[BigIan]

I`m building an extension at my brothers house, Luckily he has a combined sewer, and there is a rainwatter gully right under where the new bathroom will sit,
Will a 4" pipe cope with soil or does it need to be 6"

Also any one had any problems with building inspectors when combining plastic and clay pip on one job?

 

[bernardgreen]

If the rain water gulley has a U bend in it then the building inspector may not allow soil pipe to connect to it.

I wouldn't be happy with a U bend at the bottom of a soil stack as the solids and water will be dispersed by the time they reach the U bend. As a result the water ( flush water ) may not move all the solids round the bend leading to a build up and eventual blocking.

 

[noseall]

Also any one had any problems with building inspectors when combining plastic and clay pip on one job?

none whatsoever.

 

[BigIan]

no i`d remove the gully and make sure there is plenty of fall i was just worried as its a 4 inch pipe...


thanks for the advice peeps

 

[freddiemercurystwin]

4" pipes are used all the time for waste