Just had a culligan HE system installed. Many things i like about it, got a really good price considering all in all but i do have a question about valve life. Was chatting with a few trusted sources (friends) who know a few folks that work for culligan and they said the valves on these newer systems only seems to last a few years before needing replacement. I am reaching out to the community to see if thats an overall concern or are valve replacements typical for all softeners? I suppose a follow on question is most discussion seems to be to set softeners to regen apprx 7-9 days? Is this a general rule of thumb or is it ok to go 10-? days?