I am asked every day: “What is the difference between a Salt Free and Salt Based water softener?” In many cases we are led to believe both work the same, and the only difference is that one doesn’t use salt. This really isn’t the truth. So here’s the scoop:
Salt based water softeners use an electronic metered valve mounted atop a fiberglass resin tank that meter water by the gallon and then run a cleaning cycle when the ion resin bed reaches a saturation point. During the cleaning cycle, the electronic valve cycles a series of back flushes to purge the hardness particulates that have been captured from the system and flush them down a drain line. The sodium is also replenished in the resin bed during the cycle and all is ready to go again.
Water is processed through a catalytic media using a physical process called Template Assisted Crystallization (TAC). What happens is the hardness minerals are converted to a hardness crystal that is not able to bind to surfaces. This is actually water conditioning, not softening. If you want to know more details please visit here https://aquascienceaz.com/water-treatment/reverse-osmosis/
There is no electrical valve needed on a salt-free system because the system works as a conditioner and never captures anything therefore eliminating the need to purge any minerals.
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