... 2.Operation:Automatic 3.Stainless steel 4.Water treatment system 5. RO water treatment water treatment system 1.Silica sand filter: The equipment ... filter: The filter is designed for drinking water treatment. It can clear away alien colour and foreign ... water and can remove heavy metal such an mercury, lead, cadmium, zink, iron, manganese and hydrogenate, sulphide, small amount of remaining chlorine ...