We. ION WATER MACHINERIES , is one of the pioneers in water treatment manufacturing various water treatment equipment such as Iron removal plant, D.M. Plant, Water Softening Plant, R. O. Plant etc. situated at 10, Kiran Sankar Roy Road, Kolkata - 700001 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 require regeneration with 5% to 10% common salt solution. In case of big units saturated salt solution is prepared in a R.C.C.tank and required amount of brain is drawn in a brain measuring tank. The brain solution 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 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. This is to avoid iron fouling of Ion Exchange Resin in softener.