"Vintage" Fleck User Here!
Our house was built in the 60's, but during the 1980's it, and many other similar houses were renovated (New A/Cs, upgraded plumbing, water heater moved from hallway closet to roof {solar, no more electric}, renovated kitchen and bathrooms). This meant a water softening unit was installed.
The system has a 24,000 Grain (maximum) capacity, but with typical salt settings, you see about 75% of that, or 18,000 grains. Given the house has 4 bedrooms, its a little on the small side for a house that could house up to about 6-8 people in reasonable comfort.
We moved here in 2010, the system had failed and was no longer working. Shortly thereafter, I investigated and figured out how we could get it working again:
- New Resins (about $300)
- A rebuild kit for the 1984 Fleck 5600 Economiser (On-Demand) unit
This worked well, for several months, but the old 5600 body must have warped in the heat, as it started springing irreparable leaks, and then the timer failed.
So in late 2011, we purchased a new 240v head from "softenerparts.com," for about $200. The system absolutely has not skipped a beat since, although I can tell the water meter in the old unit was worn out, because the newer softener does regenerate more often.
I know some will ask why we didn't purchase a new model:
Small town monopolies. The guy that sells and supports systems here charges over $1000 for the unit itself, nevermind installation. They use those fancy (annoying) Digital Fleck heads. To his credit, he did let me cannibalise old heads for spares when we started getting mysterious leaks.
In the end, replacing parts worked out much cheaper. And I learned a thing or two along the way!
For the record, some friends of ours living in a house with a Fleck 5600 have only ever replaced the Resins, twice now (as they typically don't last longer than 10-15 years when used with Chlorinated "city water"). The Fleck head itself is still 100% original and working without leaks or trouble. They even found the smoked-brown plastic cover for the unit!