Yes. That is what I was told today from another plumber. Bradford-White is denying any warranty entitlements if you install one of their heaters with a water softener in the structure. If this is not true, and only affect a specific region, please make the adjustments on this thread. I found this to be quite shocking today, and wondering if the other mfg's are going to start doing this. This plumber told me that Bradford White denied a warranty replacement on a water heater 4 years old that had a water softener in the home. Anything anyone has to add, please do.