Hello John, Water quality affects every product differntly and there are a numeber of ways to evaluate water quality ie.. hardness, PH levels, Clorine as well as other chemicals or metals in the water and the percentages that are present and how they react with each other. With that said if you are having issues with a product i would direct you to email photos to our tech support line. techsupport.us@caleffi.com and we would be happy to help you work through this. Photos are always helpfull to determine if this is a water qualty or product issue. Thank you, Dan Firkus Caleffi North America