This is the land of ballcock inventor, Thomas Crapper, and vast arrays of loo rolls.
From the independent.co.uk
The ballcock or float valve is often used to regulate the filling of a tank or cistern.
From the en.wikipedia.org
In the depths of the night, a ballcock feeding BTG's fire sprinkler system jammed and started a flood.
From the newscientist.com
Rig it up to a ballcock so it automatically fills.
From the telegraph.co.uk
Most people don't use John Harrington's invention enough, some only get Thomas Crapper's ballcock moving just twice a day at most.
From the thisisbristol.co.uk
He also made several key improvements to toilets of his day, including the invention of the first floating ballcock now found in most modern water closets.
From the dailyherald.com
Crapper, however, did much to increase its popularity and came up with some related inventions, such as the ballcock mechanism used to fill toilet tanks.
From the en.wikipedia.org
Clothes designers will blame John Harrington for inventing the flushing toilet in the first place, or Thomas Crapper for encouraging its popularity and inventing the ballcock.
From the thisisbristol.co.uk
More examples
Floating ball that controls level in a water tank
A ballcock (also balltap or float valve) is a mechanism, or machine for filling water tanks, such as those found in flush toilets, while avoiding overflow. The modern ballcock was invented by Joseph Bramah and Thomas Twyford.
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 that floats in the tank water. When the toilet is flushed, the float drops and opens the ballcock, releasing water into the tank and/or bowl. ...
A toilet tank water supply valve which is controlled by a float ball.
A valve operated by a float, such as a floatball or a float-cup in a toilet tank. Back to alphabetical list
A self-regulating device controlling the supply of water in a tank, cistern, or toilet by means of a float connected to a valve that opens or closes with a change in water level. ...
A device that regulates the water flow between supply pipes and the toilet.
The valve that controls water coming into a toilet tank.