induced siphonage

induced siphonage

Siphonage of water from a fixture trap (i.e., the drawing away of water that forms a trap seal); usually due to an improperly installed vent pipe. As a result, when another fixture on the same vent pipe discharges, siphonage may be induced.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.