Warranties today are very difficult to understand. Back in the day a boiler, furnace or water tank company took pride in their product and stood behind it. Not today, so much.
Companies still offer warranties but you really need to trust someone to help you through the process or read very carefully. I install quality equipment because Churchill Oil started as a company by believing in efficient, quality installs. Also, because we are small, cal backs are handled directly by me. Call backs are a waste of everyone’s time!
Weil McLain, Williamson, Amtrol and Energy Kinetics still offer good warranties but due diligence is still required. Energy Kinetics still offers a transferable warranty. Almost unheard of!
Better than that is to install a product that doesn’t fail or break! Good luck with that. Actually though, I do install a stainless steel indirect water tank that has never needed to be replaced in over sixty installs. Don’t want to say the name for fear of jinxing myself-but if you need a new water tank give me a call and I will quote one for you.