You need to go back and read the sizing page text on my site and study it.I guess I am unclear about what the "total grain capacity" is. I thought that we use this number to pick the size of the resin tank.
Whether 2cuft is 64K or 60K, why your calculator suggests 2cuft for 35K of total grain capacity? Are you implying it's more efficient to use a 64K unit to generate 35K TGC instead of using a smaller unit?
Thanks for the help, it seems it's more complicated to calculate than I initially thought which is just let it regenerate to the max capacity of the unit and just go thru it in N days. That is what the metered on-demand units are designed for correct?
You need to go back and read the sizing page text on my site and study it.
The K of capacity of all softeners (except Kinetico) is easily adjustable; you simply change the number of lbs of salt used per cuft of resin.
The cuft of resin dictates the size of the media tank and, the cuft of resin dictates/controls the SFR gpm size of the softener.
The control valve controls when the softener regenerates and you program them for the capacity you use, the salt lbs used per regeneration and is responsible for the volume of water used per regeneration etc..
So why run a softener at max capacity and get terrible salt efficiency when you can get much better if you program for only as much capacity as the family requires for say a once every 8 days regeneration? That is the "total grain capacity", you program for that and then set the salt dose at the required lbs for that based on the cuft volume and type of resin being used. Yes, the more resin you have the better salt efficiency you can get without requiring more frquent regenerations which leads to terrible water efficiency.
The SFR and maximum usable K of capacity size of all softeners is based on the cubic foot volume (and type of resin) used and what salt dose setting is used per cuft of resin. You need regular mesh resin, not fine mesh or SST-60. And no Turbulator, just a regular distributor tube and gravel underbed. No Vortex tank either.
The tank size is the part I understand better. How about the internal valve size? Going from a 1" to 3/4" would definitely cause loss in water flow, but some folks told me that w/ a 64K (or less) tank, the 3/4" is not causing any impact. I guess it means the tank size is the limiting factor at this level and the valve size only matter if we have much bigger tank. Is that true?
This is awkward, but...
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