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Thread: Anode length matter on water heater

  1. #1

    Default Anode length matter on water heater

    I have a 75 gallon Rheem gas hot water heater that I had to replace the anode on. I purchased a magnesium anode which I think was 36". The original anode is 44". Will using the shorter anode has any negative effect?

    Thanks.

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    Sep 2004
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    New England
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    21,388

    Default

    Won't last as long...unless it is thicker...less material. That's why they call it a sacrificial anode...it erodes rather than the tank.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Service plumber. seattleplumber's Avatar
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    Jan 2009
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    Seattle, WA
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    20

    Default

    It's fine. Use it.

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