Brass 1/2 inch BSP BS1212/2 part 2 float valve (also known as a ballcock, inlet valve, fill valve or ball valve) complete with ball / float.
High pressure, suitable for mains pressure water.
Use in cold water tank, central heating feed and expansion header tank, toilet cistern etc.
Part 2 ballcock valves are quieter than the part 1 version and offer better protection against backflow.
** BSP thread sizes are measured a special way - have a look at our information page for more details **