We've had this Delta faucett (#21966LF-SS) in our kitchen for 9 years. I'm actually now looking for stem parts but, except for a faulty sprayer, which Delta replaced, this is the second time I've had a problem and after 9 yrs, I'm pleased with Delta products.(we have 5 Delta units in our home) and have only had to replace seals, thus far. If they replace parts under warranty, isn't that just about a forever product?