What is the purpose of the brine tank refill during the regeneration of a softener?

The purpose of the brine tank refill during the regeneration of a water softener is to prepare the softener for another cycle of softening. Regeneration is a critical process that involves using a concentrated brine solution to recharge the resin beads in the softener that remove hardness minerals, such as calcium and magnesium, from incoming water.

During this stage, the brine tank is refilled with water which dilutes the salt to create brine. This brine is then drawn into the softener tank to saturate the resin, effectively allowing it to continue to perform efficiently in softening water in future cycles.

The brine refill ensures that there is an adequate amount of salt solution available for effective regeneration, thus maintaining the softening capacity of the system. If the brine tank were not refilled, the unit would not be able to regenerate properly, ultimately leading to decreased performance in removing hardness from the water over time.