... water treatment system 2.PLC control 3.superior quality 4.automatic operation 5.ISO9001:2000 and CE mark Product Description The water treatment system ... includes multiple-filter-medium(JDL), sand-bar filter(GL series), fine filter(JML series), ... series), sodium-ion exchanger(SNJ), hollow fibre super-filter(CL series), ultraviolet sterilizer(ZM series), ozonator, ...