Labor can't replace material. Its called a "sacrificial" anode for a
good
reason. See he
http://www.waterheaterrescue.com/pages/WHRpages/English/Longevity/water-heater-anodes.html

--
Grandpa

Why do they call it an anode?

http://en.wikipedia.org/wiki/Anodes


I know what an anode is. I also know what a cathode is. But that doesn't
answer my question....I stick this rod in the middle of my water heater -
what makes it an anode, and not a cathode?