Water softening process is realized by ion exchange method. Ion exchange, calcium and magnesium ions that cause hardness of water, be passed with a cationic resin in sodium form is realized. Hard water passing through sodium-based cationic resin, hardness ions within water (Ca+2 ve Mg+2) change over sodium ions which are attached to the resin.

When Water Softening Units are made of design, the resin amount which will be inserted into resin tank, is calculated based on raw water character, the daily average and peak flow rate water consumption. In addition, the regeneration process, can be provided time-controlled, flow control or water hardness analyzer with the output depending on the hardness measurements as automated.