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My water softener is losing resin |
Date : 2/15/2014
From :
Blake
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Question
I am replacing the resin in my water softener today and noticed it seems to have about half as much resin as when the system was installed. In a 9 x 54 inch tank it has about 16 inches of resin. I had it installed with 1.5 cubic feet of resin originally. What should be the proper fill level of resin in this tank? What could have made the resin level go down, and I think it is probably the reason the softener stops softening now after about 500 gallons go through it. If the screen is intact I am thinking about just adding 1 - 1.5 more cubic feet of resin and not discard the old resin.
Answer
That softener would take about 1 1/3 FT3 of resin for a capacity of 40,000 grains. Normally a softener is filled 60% to allow for resin separation during regeneration. The resin must separate in order to release trapped dirt and allow for complete regeneration chemical (sodium chloride) penetration.
During operation the resin expands and shrinks as it exhausts and regenerates. During this some of the resin breaks apart and the resin "fines" are rinsed to drain during the backwash cycle. Over time, your resin seems to disappear.
Another cause of resin loss is too high a backwash flow rate and no backwash screen attached to the underside of the control head. In that case whole resin is simply rinsed down the drain.
Here is a link to the cylinder calculator That will calculate how much resin you need.
https://www.apswater.com/cylinders.asp
Here are instructions for changing water softener resin.
https://www.apswater.com/how_to_change_resin_in_a_water_softener.asp
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