Adding powered anode rod to tank with existing anode(s)

The Tank Adding powered anode rod to tank with existing anode(s)

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  • #26754
    redcenter
    Participant

    What would happen if I added a powered anode to a tank with an extra aluminum or magnesium anode rod? Keeping the aluminum or magnesium rod in its port and adding the powered anode through a different port?

    #26755
    Randy Schuyler
    Keymaster

    For a long time, I believed that the sacrificial would interfere with the powered anode, and the engineers at a powered anode maker whose products I used to carry believed that too. However, I changed supplier a couple of years ago for various reasons, and my rep with them, Corro-Protec, says it won’t make any difference at all. By now, if there really were an issue, we’d have discovered it. So add away.

     

     

    #26757
    Larry Weingarten
    Participant

    Hi, I see pros and cons. The pro is that if the powered anode fails, the sacrificial rod will keep the tank protected. The con is that the driving current of the powered anode is greater than the sacrificial rod and the powered rod will spend current to protect the sacrificial rod and prevent the sacrificial rod from working. I’d still avoid using aluminum unless the water is for machine use only.

    Yours,  Larry

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