Now that my son is off at college, it's just the wife and me so the system is probably not set optimally. The previous owner had two adults and three teenage children and the system was sized for his family. Also, the house is 5 bedrooms and 3 baths. So, this is a 25 year old system with almost all original parts and with the original resin. Lately, it just seems that every time it regenerates the water tastes bad for a while and we get iron deposits on the fixtures. Since then, I've taken it apart a couple of times to clean it out myself. The local service folks fixed this the first two times. Since then, we just occasionally get bad tasting water when the system regenerates. (There is no pre-filter) The initial symptom was the brine tank overflowing. The system worked fairly well until the well pump impeller disintegrated in 2005 causing little plastic bits to show up occasionally in the Kinetico valve system. My home is on well water and I've owned the home since 1996. I have a Kinetico 60 water softener that was purchased by the previous home owner in September 1985.
