air valve

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British Dictionary definitions for air valve

air valve

noun
  1. a device for controlling the flow of air in a pipe
  2. a valve for exhausting air from a fluid system, esp from a central-heating installationSee also bleed valve
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012