Re: Replacing HW Heater anode rods
Hard to say --- 20 years is a pretty good life span.
If the old anode rod has broken apart inside the tank ( providing there is anything left of it ) any large chunks could bang against and cause cracks in the glass lining from the turbluence of water entering and exiting. Once there are cracks in the inner glass liner will cause the metal tank to rust and leak.
If you want to spend the $30 or so for replacing the anode rod and drain out the sediment might prolong the life of the tank ---- might be a week or a year --- tough to say.
"" an ounce of perception -- a pound of obscure "