... Activated Carbon, Sodium, Sand ect. filters The Reverse Osmosis (RO) Purification System adopts stainless steel sand filter and activated carbon filter ... filter, chemical doser, water softener, micro filter, reverse osmosis membrane, back washing system, pressure adding pump, sterilizer, water tank and pipe ... SystemCleaning pumps, Cleaning box, Control box etc. Reverse Osmosis Purification System I