We, ION Water Machineries, one of the pioneer in the field of water treatment in West Bengal, Kolkata. Manufacturer and supplier of water treatment equipment since 1967. We are making Iron Removing 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 solids and Anions. Depending on the mobility of these ions, the water portion passes through the membrane and very low amount of salt 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 continuous 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 it also prevents 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.