Water Softener Sizing
Hello! I've been reading some of the posts on this forum (and a couple of others) about water softener sizing and feel I need some help. We have a Sears water softener that was installed 7 years ago and has recently failed. I understand that with the Sears and big box store units 5-7 years is approximately the lifespan to be expected, so I am preparing to purchase a new unit. Our water has the following characteristics:
Hardness: 21 gpg
Iron: .011 Mg/L
Manganese: .0027 Mg/L
Our incoming water line is 1" and a flow rate taken at a yard stand teed from our main water line with 3/4" line was 15gpm. We have 3 1/2 baths with a Jacuzzi tub and a multi-head shower. There are 4 people living in our home.
I'm not sure I understand all of the variables, but after looking at some available models I have some questions and would appreciate some learned opinions.
It appears flow rate is limited by the cubic feet of resin in the system. Should I be looking at a 2.5 cubic foot system to maximize my available flow rate? If so, is the Fleck 7000SXT an appropriate valve? How often should a system regenerate? It appears that with 4 people each using approx 60 gallons of water per day that somewhere between 35000 and 40000 grains would be appropriate for a once per week regen. That would seem to indicate that a 2.5 cubic foot unit is too large except for the flow rate.
Thanks in advance for any opinions!