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 ?
Drain cocks come in several different styles--screw threads, quarter-turn twist, and quarter turn and pull.
Then, close the drain cock. Handle the drained fuel as hazardous waste and recycle it as prescribed by your SOP.
Open the separator, located behind the engine access door (curbside), by turning its drain cock counterclockwise.
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. Your system is not contaminated.