vent pipe

nounPlumbing.

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

Origin of vent pipe

First recorded in 1855–60

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

October is a good month — think ghosts and cobwebs as a memory aid — to start an annual routine of pulling the dryer away from the wall, detaching the vent pipe and vacuuming it out.
Here are 9 home maintenance tasks for your October to-do list | Jeanne Huber | September 27, 2021 | Washington Post
No sheet metal, brick, or other flue shall be used as a vent pipe.
Elements of Plumbing | Samuel Dibble
Having opened the vent pipe valve and relieved the pressure, open the valve in the water filling tube.
Oxy-Acetylene Welding and Cutting | Harold P. Manly
The ice room should be ventilated by means of a vent pipe up through the roof to the open.
Campward Ho! | Unknown
The S trap is, upon the whole, the best, but it should be provided with a vent-pipe to prevent siphonage.
A System of Practical Medicine by American Authors, Vol. I | Various

The lower part of the T acts as and connects with the waste pipe while the upper half is and connects with the vent pipe.
Elements of Plumbing | Samuel Dibble

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