drain cock


Also found in: Acronyms.

drain cock

A small cock or faucet, at the lowest point in a tank, for draining off the liquid.
References in periodicals archive ?
Reconnect and clamp the radiator hose and reinstall the drain cock after draining.
Open the separator, located behind the engine access door (curbside), by turning its drain cock counterclockwise.
Tenders are invited for Assy Radiator Block W/Filler Cap W/Vaccum Cap And Drain Cock
Icf/Std-3-5-066 Alt-B With 1/2 Drain Cock To Drg No.
If that happens, fuel pours out of the drain cock all over you and the ground.
If the fuel is free of contaminants and water, close the drain cock.