PPR ball valve : 1,Certificates:CE,ISO 9001 2,OEM accept ... ball valve:Application:1.Hot & cold water facilities for civil buildings, dwelling house,swimming pools,air port, ... systems of food, chemical as well as electron, for instance.deionized water2.Drinking water supply3.Air conditioning ... the product, green building materials, can be used for the piping system of pure drinking water.2.Polypropylene ...