I use a water softener which extends the life of the anode rod considerably, but still check it once or twice a year. The one pictured above I'd keep as a spare, my last one was about the diameter of a coat hanger.
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Fulltimed 10+ years
Sold '13 Thor Redwood 36 FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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