vent stack

Plumbing exhaust tube

A vent stack is a vertical pipe that extends from a building's drain system through the roof, allowing sewer gases to escape and air to enter the plumbing.

Without it, draining water would create a vacuum that slows flow and can siphon water from traps, letting odors into the building.

Also called a stack vent or plumbing vent.

plumbing

PVC

Chlorinated plastic abbreviation

ABSAnti-lock braking system
cast ironBrittle iron-carbon alloy
building codeRegulations governing structure erection

backflow · cleanout · P-trap · S-trap · drainage · waste pipe · sewer gas · plumbing code

function

sewer gas

Fumes from waste pipes

airflowMovement of atmosphere
negative pressurePressure below ambient levels
suctionPulling via pressure difference

gurgling · water seal · atmospheric pressure · air circulation

roofing

flashing

Repeated brief illumination

bootHigh shoe or startup
collarNeck encirclement
penetrationEntry into something

shingles · roofline · weatherproofing · sealant · membrane · curb · counterflashing · neoprene · caulking · ice dam

installation

plumber

Water system tradesperson

couplingJoint between systems
elbowArm's middle joint
reducerSomething that lessens

increaser · pipe clamp · hanger · pitch · slope · offset · reroute · tie-in · rough-in · inspection

Opposites

plumbing function

vent stackdrain pipe

Tube for waste removal

supply line · sewer line · downspout · waste pipe · water main

airflow direction

vent stackair intake

Engine's atmosphere entry point

intake vent

Family

stack, adventure, vent, invent, stacked, intervene, fervent, vents, convent

Familiarity: Top 500,000
Profile: Used worldwide · Timeless · Concrete · Rated G