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Thread: Hot water stinks, but cold water is fine

  1. #1
    DIY Junior Member mlnk's Avatar
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    Jul 2011
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    Question Hot water stinks, but cold water is fine

    We have a small hot water heater in our office. The hot water smells like rotten eggs at the sink when you wash your hands. We have drained it and run lots of water but the smell remains. Should we flush it with white vinegar?

  2. #2
    Moderator & Master Plumber hj's Avatar
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    Pull the anode rod. But if its material has broken off and is laying in the bottom of the tank, it may not be correctable without replacing the water heater.
    Licensed residential and commercial plumber

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
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    The metal in some anode rods can react with some water to produce that smell. The choice is to either remove the anode rod as suggested, or to replace it with one that won't react to the crud in your water. To get it out, you may need an impact wrench, since they are in there tight, and it's been there awhile. the anode rod is more technically called a sacrificial anode, and it is the 'weakest' thing in the tank, and gets eaten up first, rather than the tank rusting out. So, removing it can speed up the demise of the tank.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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