vent pipe

noun

Plumbing.

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

Word History and Origins

Origin of vent pipe¹

First recorded in 1855–60

Example Sentences

They think the purpose of the vent pipe is to expel sewer gas outside.

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I created a small bathroom with normal fixtures, but instead of using the code-required vent pipe sizes, I vented the entire bathroom with just 1/2-inch-diameter pipe.

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This extra pipe was a vent pipe.

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I didn’t understand how that vent pipe worked at the time, but after a few trips to the local library, I discovered why the pipe was a vital part of the system.

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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.

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