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Thread: Stagnant water smell after flushing

  1. #1
    Scientist M&S's Avatar
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    May 2008
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    Default Stagnant water smell after flushing

    The powder room of my new house has a St. Thomas Creation low flow toilet with Quattro Flushing technology. This was installed in summer of 2006. Recently I have begun to notice a stagnant water smell emanating from this bathroom. There are other low-flow models installed in the house; e.g. Toto and these bathrooms do not seem to have the same problem. The smell is particularly powerful if the door to this bathroom is closed for a period of time. The smell seems worse after flushing. Any ideas?

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    Sep 2004
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    The vanity sink and/or toilet may not be properly vented, and when you flush the toilet, it sucks water out of the trap at the vanity, opening up a direct open-air path to the sewer.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Master Plumber Redwood's Avatar
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    Dec 2007
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    The weakest joint in the plumbing system is the wax ring... I would reset the toilet for starters and see if that does the trick... If the toilet is at all loose the chance of the wax ring leaking jumps to 100%

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