33 years on my Flint and Walling softener and I have only had to change the clock.
Not because it broke but it got a little noisy.
13 years in my 1st. house and 20 years in my 2nd.
I fill my water tank from my water softener from home. It is a basic sears model and has worked well for about the last 10 years, just started having problems not softening last week, time to replace it I guess.