We, ION Water Machineries, one of the pioneer in water treatment, we are water treatment plant manufacturer and supplier in Kolkata, West Bengal since 1967. We are also mfrgs of water softening plant. Softener is packed with high Polystyrene base resin in sodium form. During service period polystyrene base resin in sodium form adsorb Calcium. Magnesium in raw water and after producing certain amount of soft water these are exhausted. These then required regeneration with 5% to 10% Common Salt solution. In case big units, saturated salt solution is prepared in a R.C.C. tank and required amount of brine is drawn in a brine measuring tank. The brine soln. is then diluted with the help of an injector and fed into the softener. Soft water is then tested with the help of a Hardness Test Kit and fed into the different processes. In case raw water contains iron more then 0.3 ppm as Fe, an Iron Removal Filter must be installed before a softener producing