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Air trap

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air trap

[′er ‚trap]
(civil engineering)
A U-shaped pipe filled with water that prevents the escape of foul air or gas from such systems as drains and sewers.
(engineering)
air pocket
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Air trap

A U-shaped pipe filled with water and located beneath plumbing fixtures to form a seal against the passage of gas and odors.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

trap

1. A device to maintain a water seal against sewer gases, air, and odors; also called a stench trap.
2. A removable section of a theater stage floor.
3. Same as traprock.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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