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anode

  1. Appliances
    How does it manifest itself if the anode is bad? What are the symptoms? How often should it be replaced?
  2. Plumbing
    The sacrificial anode on my (gas-fired) hot water heater has a hex head on it, so it looks like it could be replaced. Am I right? If I replace it, say, every 2 or 3 years with a new one (where would I buy a new one?), would that extend the life of the unit?
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