We, ION WATER MACHINERIES, one of the pioneers in water treatment industries situated at 10, Kiran Sankar Royb Road, Kolkata-700001, manufacturing various type of water treatment equipment such as Iron removal Plant, Water Softening Plant, R.O.Plant etc. Reverse Osmosis is a separation process, in which a solvent, water in this case is permitted to pass through a semi permeable membrane, leaving behind the dissolved solid (constituted by various ions called Cations and Anions. Depending on the mobility of these ions, the water portion passes through the membrane and very low amount of salts will pass through the membrane. Thus the filtered water has about 10% TDS. This process will remove bacteria, virus, Protozoa and reduce the harmful chemical namely Fluorides, Nitrates, Pesticides, Lead, Mercury, Arsenic etc. During Reverse osmosis process, there is a continous rejection of water with concentrated salt content and this will be coming out from the RO cartridge. This is very important for membrane cleaning and is also prevent membrane from choking due to scaling of Calcium and Magnesium. Hence, the water flow is adjusted in such a way that purified and rejected water is maintained at 1:3 ratio