Definitions for "BALLCOCK"
Keywords:  flush, tank, refill, shuts, float
floating ball that controls level in a water tank
A fill valve device in a toilet tank. A "Cock" is activated by a float "Ball" to refill tank water after a toilet is flushed.
The fill valve that controls the flow of water from the water supply line into a gravity-operated toilet tank. It is controlled by a float mechanism in the tank water. When the toilet is flushed, the float drops and opens the ballcock, releasing water into the bowl. As the water in the tank is restored, the float rises and shuts off the ballcock when the tank is full.