Many toilets also have a tube, called the bowl-refill tube, that runs from the ballcock to the overflow tube.
22.
When the tank is empty the flush valve closes and a supply valve, a ballcock, allows fresh water to refill the tank.
23.
In toilets with cup floats that are positioned around the body of the ballcock, look for a metal clip attached to a rod.
24.
This slowly lowers the water level inside the tank until it drops enough to open the ballcock ( inlet valve ) and start refilling.
25.
Water hammer, Aeroelasticity # Flutter, and Ballcock linked for reference . talk ) 01 : 27, 30 April 2015 ( UTC)
26.
The ballcock ( inlet valve ) may have to be adjusted to allow for a higher water level inside the tank after it has been filled.
27.
As the water level inside the tank drops, the ballcock ( the inlet valve ) opens and more water comes into the tank to fill it.
28.
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29.
Adjusting a float cup requires a different procedure, because the cup floats up and down on the ballcock shaft, making it integral to the whole assembly.
30.
When the float, which rises with the rising water, gets high enough, it triggers the ballcock to close the supply valve and the tank stops filling.
