Soil/waste pipe installation, Scotland Drainage and wastage systems and plumbing help, advice and answers

[Billy Clark]

Can anyone tell me should toilet soil pipes vent through the roof or can they be left open in the attic space?

Kind regards
Billy

[htg engineer]

vent through roof - cannot be left open in attic space unless a durgo valve is fitted - otherwise your house will stink of sewage drain.

[jedums]

Take thru the attic and out any wall, but it must rise 3 ft above any window below it. Durgles are fine in a new space like a cupboard becoming a toilet but if you're going into the attic just carry on, it'll cost about £30 more for the right job done right.