Quote:
Originally Posted by ThirdOfFive
Have you checked your owner's manual? If you don't have a hardcopy even at 17 years old a manual should be online and not too hard to find. That should answer your questions about maintenance.
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I have read my Rheem manual, and it doesn't have any definitive recommendations for maintenance of an electric tank type water heater. It only "suggests" draining a small amount of water from the tank occasionally. There is no recommendation for draining and flushing the entire tank, or for replacing the anode. I have never done any maintenance on a water heater.