Durable plastic ball float, designed for float valves. made of high-quality plastic that is water proof, resistant to corrosion and to deterioration from sunlight. The plastic ball float is easy to install and to replace. And it is essential for controlling the flow of water into your tank. As the water rises it causes the float to rise and shut the valve, preventing further intake of water until the tank begins to empty again.  It is suitable for a variety of applications, such as residential ,commercial and industrial applications.