A round ball float such as this is the component of a ball valve that allows water to flush through to the toilet pan and allows the cistern to re-fill. A ball float needs to be used in conjunction with a ball valve, which is an integral part of the internal workings of a toilet cistern. Features & Benefits: It determines and controls the amount of water allowed back into the cistern, to ensure there is no overflow. When the flush lever is pulled, the valve rises, allowing for the water to rush out of the cistern and into the toilet pan. When the water runs out and the handle returns to its original postion, the valve drops back into position, and the cistern refills. Suitable for use with storage tanks and toilet cisterns. Suitable for plastic and metal float valves.