Atwood water heater anode rod

dougrainer wrote:


"Atwood water heater tanks are constructed of a high strength aluminum.
The interior of the tank consists of a .0015 thickness of type 7072
aluminum (pure aluminum and zinc) that is fused to the core during the
rolling process. This material protects the tanks from the effects of heavy
metals and salts found in waters throughout the country. It is anodic to
these heavy metals and acts much like an anode in a steel glass lined
tank except it will last much longer. Aftermarket Anode Rods are not
required and should not be used and will void warranty

First, that thickness can't be right.

Second, "It is anodic to these heavy metals and acts much like an anode in a steel glass lined tank except it will last much longer." this comment is something that I wonder about. With the tank sacrificing material like an anode rod, at some point the tank should be spent.