Quarter
An English measure of malt equal to 336 pounds of barley, 448 pounds.
Quick-disconnect
The mechanism which allows keg fittings to be connected and disconnected quickly and easily. Consists of a keg fitting on the keg itself, and a mating connector on the gas or beer line to be connected to the keg. When the quick-disconnect is not connected, spring-loaded valves in the keg fitting and connector prevent any liquid or gas from flowing. When the quick-disconnect is connected, the mechanism causes both valves to open.