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Old 06-05-2018, 09:11 AM   #4
travelin texans
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Join Date: Nov 2017
Location: Picacho, Az
Posts: 6,809
Which brand of water heater, Suburban or Atwood? They both heat water but operate a bit differently.
Instead of loosening the drain plug, just lift the lever slightly on the pressure relief valve, if water is there you know it's full.
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