Waste and drainage · Soil stackSoil stack
Soil stack
The main drain.
The main vertical pipe that carries waste from the toilet and other fittings down to the drains, and vents gases out at the roof.
- Carries
- Toilet and other waste
- Runs
- Vertically
- Vents
- At roof level
- Material
- Usually plastic or cast iron
What it is
A large pipe running up the inside or outside of the house, connecting to the underground drains.
Good for
Planning
Knowing where it is helps plan the most direct pipe routes.
What to weigh up
Connections
New connections to it are part of the plumbing work.
Planning a new layout?
Tell us about your room and what matters most, and we'll help you make the most of it.
Start your project briefIllustrations are concepts, not measured plans. Click any picture to enlarge it.