The polyvinyl chloride, (C2H3Cl) n, also known with the corresponding abbreviation PVC, is the most important polymer of the series obtained from vinyl monomers and is one of the plastic materials of higher consumption in the world. They are produced in diameters from ½'' - 1'' - 1 ½'' - 2'' - 3'' and are used for dosing of corrosive products in various types like industrial water treatment plants, electroplating, basic chemicals. Compatible with all products in corrosive acids, bleach, soda is required where maximum resistance to chemical attack.