Often refered to as a ball cocks or ball valves.
Ball Float Valves
Jollyfill side inlet valve with 1/2" BSP brass connection. Filter pressure...13375537150410£16.00
Jollyfill bottom telescopic inlet valve with 1/2" BSP brass connection....03375537150434£16.00... more info
Jollyfill Universal Cistern Kit. The Universal kit offers the complete solution...13375537159475£26.00