Is there a way to determine if the anode rod is aluminum vs. magnesium?
I’m assuming I need a power vent tank and looking at this model: http://www.homedepot.com/p/Rheem-Performance-40-gal-Tall-6-Year-40-000-BTU-Power-Vent-Natural-Gas-Water-Heater-XG40T06PV40U0/204318424. The description only says it uses “A premium grade anode rod provides long lasting tank protection”.
Also, if it is aluminum then how difficult would it be to replace it with a magnesium? Not gonna lie, my DIY skills are pretty horrible. Is this something that a plumber could do if I order the parts from this site as described here: http://www.waterheaterrescue.com/pages/WHRpages/English/Longevity/water-heater-preventive-maintenance.html
Okay, may have found my answer according to the Anodes page on this site. Because this model is a Rheem it says “The exception to that is Rheem and its sub-brands, Ruud/Richmond/General Electric. As far as we know, Rheem always uses magnesium even though there is no bump on top of its anodes. On the other hand, if the tank is five years old or more, having dissimilar metals is less of an issue, since the original one will likely be largely consumed.”