air cock


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pet cock, draw cock

A small valve installed in a piping system or on a piece of equipment to drain it or to release air pockets.
References in periodicals archive ?
Conbraco), a firm devoted to the manufacturing of water gauges, safety and relief valves, gauge cocks, air cocks and other valves for the plumbing, heating and cooling industries.
Tenders are invited for RR of defoliated rubber and wooden beading, sluice valves, air cocks, pressure release vlaves, surface finishes and connected works of Varuna and Surya Caisson gate at NDV
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