The water treatment system is pre-treating amd desalting the tap water in the raw water tank in the RO system to get pure water. The pre-treatment device consists of quartz sand filter, active carbon filter, natrium ion exchanger and precision filter onizer and so on. we adopt imported RO membrane of Hydranautics from U.S.A for RO system. The structure of whole line is simple, the operation is convenient, the technical level is high. This system is the most ideal drinkable water production line.