This is my third unit going on 16 years. Meaning, the units last about 7 years before some sort of failure. Not complaining. I have a hot/cold unit that I keep using the original SS dispenser. Up front cost for heating unit and dispenser was hight but all I replace is the heating unit. Again, not complaining because I run reverse osmosis water from a filtration unit. The nature of R.O. water tends to be aggressive on metallic components. ISE has this market locked up.