POM plastic ball with smooth surface, high hardness, good self lubricity, so the water supply equipment will be used often, not because of the scale of water supply equipment caused by the blockage, and can also be used in some water, mainly in high resistance to corrosion, not to do too easy to stick the metal faucet rust scale, long service life, general other water supply parts damaged, POM plastic ball there will not be a problem, so the quality and the service life is very reliable, POM plastic ball used in the water supply equipment on the most commonly used specification is 9.525MM, the plastic ball used in many kinds of water supply equipment, is the international universal standard specification, POM plastic ball can be tested with 100 thousand times the life, so in some large-scale water purification equipment, widely used in sewage treatment equipment.