vent pipe

American  

noun

Plumbing.

1. a pipe above a waste pipe or soil pipe that allows gas to escape from the system.

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Etymology

Origin of vent pipe

First recorded in 1855–60

Example Sentences

The vent pipe in your roof allows the air to enter the system to replace the air being pushed through the pipes by the drain water.

From Seattle Times • Feb. 13, 2023

Here’s a partial list of things that are not a roof: plumbing vent pipe, chimney, skylight, powered roof ventilator, attic or room dormer, and a wall that’s next to and rises above a roof.

From Seattle Times • Jun. 14, 2022

Although rare, it’s possible a vent pipe in an attic or wall might have a crack or an improperly sealed fitting.

From Seattle Times • Jan. 27, 2022

Some flashings are built into products like a bathroom vent roof cap or the standard plumbing vent pipe flashing.

From Washington Post • Jan. 8, 2019

He’d built the frame from long beams, the roof and walls from decking, the chimney from a vent pipe off a lost steamer, one window from a porthole.

From "Beyond the Bright Sea" by Lauren Wolk