How to change the ball valve ballcock in your cold water storage tank in the loft.
Roof tank ballcock.
They work by rising with the water level in the tank which in turn activates a lever which then shuts the valve.
Just follow this video it s easy save money on expensive plumbers.
One of the most common toilet repairs is adjusting or replacing the fixture s fill valve.
Before you go any further check that there is no water in the ballcock float.
Ballcocks also known as float valves are found in water tanks and are used to control the flow of water into the tank.
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On a roof tank you should find the tap on the top pipe.