
Originally Posted by
Gary Slusser
If your softener has been using less than 15 lbs of softener salt per cuft of resin per regeneration, you get the maximum K of capacity of 30K per regeneration. It is a very rare softener that is programmed that way.
Most are programmed to use much less salt than 15 lbs/cuft of resin so.. you don't get the maximum K of capacity meaning not all the resin is regenerated, just the amount of capacity you use based on the hardness and number of people using water on a daily basis. IF you have used more capacity than the softener has been programmed for, yuo get hard water through the softener.
Example... you have a 1 cuft (32K as they are called although you don't get more than 30K/cuft) and it is programmed for 6 lbs of salt per cuft which regenerates 20K, leaving 10K of the original K of capacity still in the resin/softener.
So some day you use more than 20K of capacity by say 3K. Only 20K is regenerated the next regen, leaving 7K.
Now do that overuse a number of times (like your drip irrigation) and you use up the 'extra' K of new resin capacity and then your 6 lbs can't regenerate the 20K the softener uses between regenerations based on metered gallons, and you get hard water through the softener and start looking for why that is.... and find nothing wrong with the softener's operation.
To cure that situation you need to change the salt dose to 15lbs and do 2 manual regenerations one right after the other with no water use during or between the two so you regenerate all the resin back to 30K/cuft. Then change the salt dose back to the 6lbs or whatever is was originally and don't run irrigation water through the softener anymore.
You use potassium chloride and should increase the salt dose by 12-30% to equal the capacity that that much less sodium chloride would require for the same K of capacity. Or, my suggestion is to switch to salt and save some money over buying expensive potassium chloride.
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