Air Vent

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Air Vent

 

a valve that automatically releases air from water pipes. Air vents are installed in places where air accumulates, usually at the highest points in the pipeline. They are also used in heating systems and on water heater discharge lines.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

air vent

In a water distribution system, a vent for releasing trapped air; usually located at the highest point in the system.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.