coalkirk wrote:Yes I've replaced an annode rod. The time to do it is long before your water heater is 25 years old however. (late 80's you said) That water heater is well past its service life. Just replace it. As to annode rods, the original one would have been a rigid rod. The replacement will be in sections that are flexible due to clearances to basement ceilings. Makes it easy to get it in the water heater.
You are probably right. This is in a rental unit that I purchased which unfortunately I am already dropping about 15K into it for a kitchen remodel and new appliances. I don't think I have the budget at this point to replace the tank. I'll inspect the combustion chamber (natural gas fired) for any rusting, pitting etc... If any then I have to obviously change the tank. If not, then I'm hoping that I can squeeze a few more years and let my cash reserves recoup before making plans to change the tank. I'm thinking that an anode replacement plus flushing the tank of any sediment will carry it on for a few more years.