... RO membranes manual wash with medicine; pure water high water level auto stop,low water level auto start; Multi-stage pump ... . The entire system was verified by many pure water manufacturers that the removal rate of bacterial ,poisonous ... , carbon tetrachloride, benzene, polycyclic aromatic hydrocarbons, pesticides, phenols, as well as lead, mercury, beryllium, chromium, cadmium, uranium , thallium, ...