Why Resistorized Water Heater Anode?


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Old 04-08-20, 08:32 AM
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Why Resistorized Water Heater Anode?

The anode rode is sometimes called a sacrificial anode because it sacrifices itself (dissolves away) to retard corrosion of the tank.

The most detailed description of the resistorized anode is that a resistor (in the screw in cap at the end of the rod) prolongs the life of the anode.

Doesn't that mean the tank will suffer a little bit more corrosion compared with having a non-resistorized rod (although there is still some protection offered by the resistorrized rod)?
 
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Old 04-08-20, 09:37 AM
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Yes, I think your thinking is correct. I have never seen a resistorized anode and I know on boats you want the best electrical contact you can get. Resistance is to be avoided.
 
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Old 04-08-20, 10:25 AM
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I agree. The anode rod would need to be fully grounded to work most effectively.
 
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Old 04-11-20, 12:15 PM
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Thanks.
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