Fleck 5600SXT capacity
Based on some posts here I realized that a 64k system actually has a usable capacity of about 40k due to recharge brine efficiency. However, I programmed my system as 64k capacity and 22 grains hardness and it started at 2800 gals until next recharge. This means it is using the full 64k capacity, i.e. 22*2800= 61k. Now this is the first use of the system and because the media is new is actually does have 64k capacity but it's hard to believe the programming bothers with this.
Do you actually program the unit as a 40k system? Seems like the valve would take the brine efficiency into account.