clack valve
noun
a valve having a hinged flap permitting flow only in the direction in which the flap opens.
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Also called flap valve.
Origin of clack valve
First recorded in 1855–60
Words nearby clack valve
clack, clacker, clackers, Clackmannan, Clackmannanshire, clack valve, Clacton, Clactonian, Clacton-on-Sea, clad, cladanthous
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020