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Thread: Sewer gas odor

  1. #1
    Join Date
    Mar 2008
    Posts
    2

    Default Sewer gas odor

    I have been getting a sewer gas odor in my bathroom. I noticed the odor outside and thought the odor was finding its way in so I bought a Sweet Aire vent cap (charcoal filter) and installed it on the roof stack. The odor outside is gone. I've narrowed down the source to the toilet in my master bathroom which is in a 3' x 5' room by itself. When the shower in my other bathroom is in use, the smell appears. When I flush this toilet, the smell(sometimes)appears. The toilet doesn't leak either above or below the floor. The toilet is brand new, called a Titan by Eljer. The toilet in my other bathroom is directly behind it on the other side of the wall. Both toilets operate properly except for the smell (from the one toilet.) The picture attached shows the drainwork from both toilets. The good toilet is in the top of the picture, the second toilet is the one that wye's into the main line. The vent stack goes vertical in the wall between the two toilets.
    Help!
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  2. #2
    Join Date
    Aug 2007
    Posts
    612

    Default Re: Sewer gas odor

    It is very likely that the wax ring on the toilet flange is not sealing all the way. It is good enough to keep water from leaking, at least noticeably, but not sealed well enough to keep the gas from escaping. I believe you will need to pull the toilet and install a new wax ring.

    Did you notice if the toilet flange is flush with the finished flooring when you had it pulled the last time? If it is below the finished flooring you may need a thicker than standard wax ring, they are available.

    Hope this helps.

  3. #3
    Join Date
    Mar 2008
    Posts
    2

    Default Re: Sewer gas odor

    Thanks, I'll give that a try!

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