Living · 6 pages · 12 min
How a house stack vents a plumbing line
A pipe to the roof lets air in so waste can fall without emptying the traps.
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From the opening
A vent is a pipe that connects the drain system to open air, usually by continuing up through the roof. It lets air in behind falling water so the waste line does not pull a vacuum and siphon the traps dry. The opening covers air behind falling waste water, how siphonage empties a trap, and positive pressure and a blown seal.
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Inside
- Air behind falling waste water
- How siphonage empties a trap
- Positive pressure and a blown seal
- What blocks a roof vent
- Where the idea stops applying
- A distinction worth keeping
Sources
- Trap siphonage in an unvented drain
- The soil stack as a vent to atmosphere