Andy CWS wrote:The brand of softener certainly can determine the salt efficiencies. That is why third-party, non-profit verifiying agencies like NSF, UL, WQA, etc., test monitor, evaluate and record results of exhausting testing to determine numerouis parameters of softener (and other water treatment equipment) capacities.
They only do testing on equipment from the companies wanting to submit it for testing but...
What you are saying about softeners is like saying that the brand of car/PU/SUV dictates fuel efficiency. Yet even though the government supposedly sets and records fuel efficiency, that does not mean you will get that efficiency with all the models in that brand or the individual vehicle you drive.
Outside the lab in the real world, the person's right foot and the maintenance done on the vehicle controls the fuel efficiency. That includes how much or little air is in the tires etc..
All softeners have a means to set the salt dose and a given volume of resin. They can not operate otherwise. The volume of salt in a given volume and type of resin, that controls the K grains of capacity of the softener; as you admit below.
Thereby the salt efficiency is not based on the brand name of the softener, or the brand of control valve on it, or the brand of the tank the resin is in or, if the softener has been through a certification program at the NSF, WQA etc. etc..
Andy CWS wrote:Now the same softener can adjust salt dosage, that's true. But salt dosages can be set so low that they stop becoming effective.
The softener with variable brining adjusts the lbs of salt used per regeneration, all other softeners can not but, maybe you meant that all softeners have an adjustable salt dose setting; whic his true.
A softener with variable brining will be programmed to the same number of lbs and K of capacity as the identical softener without the variable brining feature but... the variable brined softener will regenerate much more frequently and usually use the same or more total salt when compared to the other softener with one regeneration only every 7-9 days. A variable brined softener will use more water than the non variable brined softener and the salt may be the same for both types of softeners.
Also, are you saying that at a certain number of lbs or below a certain number of lbs, that salt does not regenerate any of the bed? If so what number for what volume and type of resin?
Andy CWS wrote:Timer systems are infamously innefficient as their regenerations are a guessing game. Brands that use fine mesh resin may have high efficiencies (higher than 5000 grains per pound of salt). Packed bed softeners are also very efficient, with some limitations.
You forgot SST-60 resin, which has better efficiency than fine mesh.