The resin adsorbs calcium and magnesium ions in the water and releases sodium ions at the same time, so that the water flowing out of the water treatment equipment is softened water with hardness ions removed.
When the resin adsorption of calcium and magnesium ions to reach a certain degree of saturation, the hardness of the water increases, the water softener will automatically carry out the regeneration of the failed resin in accordance with a predetermined procedure, the use of a higher concentration of sodium chloride solution (brine) through the resin, so that the failure of the resin to restore to the sodium-type resin.
So, the brine bucket is to make the resin in the water treatment equipment can be recycled and set up.