The brine tank helps the water softening system in regeneration. The brine tank holds a highly concentrated solution or less diluted solution of salt to restore the resin beads’ positive charge. Salt is added manually to the brine tank in the form of pellets. These get dissolved in the water at the bottom of the tank. When the control valve registers the softening capacity of the resin is vanishing, the heavy brine solution is taken out of the tank and flushed out through the resin in the mineral tank. If the brine tank runs out of salt, the water passing through the unit will not be softened.