@Joethewaterguy,
Actually here is what he said about sucking air: When I said it sucked air, I mean it had pulled all the water out of the brine tank, and the only thing left to suck was air at the 20 minute point.
That is normal and he wasn't sucking air. IF it was sucking air, he'd have more water in the salt tank than normal, that's not been mentioned and I assume it hasn't happened.
Same for the BLFC being the wrong size (gpm) and larger, which it certainly would be IF it were missing. That is a real stretch Justalurker put out to impress the uninformed.... He would be regenerating with more than his 12 lbs of salt and get more capacity per regeneration, and not be running out of capacity before the next regeneration; which IS his problem. If it were a smaller gpm, a BLFC controls the gpm into and out of the brine tank, then he'd run out of capacity sooner than he is. And the same if it was in backwards.
As to oil and water and their different specific gravity. Pour water into a tank/bucket/glass of oil, gas, diesel fuel/heating oil, etc. and the level in the container rises/increases. Then pour oil, gas, fuel oil into a tank of water, and the level increases/rises. Either way the level increases the same as adding fresh water to salt water brine, or brine to fresh water IF the fresh water can get out of the brine well into the brine, which actually happens in the bottom of the brine well. Recall he doesn't have hard water all the time, just a day or more before regeneration. So if he was not getting brine, he'd have hard water much sooner or always. Or... lets do it this way, in his brine refill cycle position, he is adding teh water to the salt tank at roughly 3 lbs per gallon of water, how many gallons of water would over fill his 4" brine well if teh fresh water floated on top without mixing with it and flowing into teh rest of the salt tank; maybe 3 gallons right? His 12 lb salt dose takes roughly 4 gallons and he'd have water going out the elbow overflow on the side of the salt tank, on to the floor unless he has a float controlled 2310 safety brine system, which would cause the float to rise and shut off the water before it got to the elbow if it was set correctly. So he wouldn't be getting 12lbs worth of capacity. Right?
And actually, there is always brine water up the side of a #500 air check, which is used with a 2310 valve, to 2" from the bottom of the pickup PLUS the distance it is off the bottom of the tank. So all his fresh water would be in teh well, and he wouldn't get any regeneration.
If he has cleaned his tank or disturbed the well at all, I doubt he is going to see two different levels of water again and I don't think that was the cause of his problem.
And where do you see that I am trying to sell him a control valve or anything else? What's with that kind of comment?
He is an engineer, wanting to know everything in the deepest detail, with his own thoughts on what is wrong. Everything I've said is meant to help him understand softeners, how they are sized and how things work as to the programming etc. etc. and to troubleshoot his problem, that he insisted up to just a couple posts ago was this two different levels of water in the well and he wasn't going to post here anymore. Something made him change his mind and it may be something I said, or not.