How to check & clean exhaust pipe on roof. (sewer gas smell)

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  1. profile image47
    patcando2posted 7 years ago

    How to check & clean exhaust pipe on roof. (sewer gas smell)

    We have a terrible sewer gas smell in our master bathroom. We had the toilet taken up and a new ring put in toilet replaced. no improvements. now serveral weeks have gone by and the smell is unbearable. We keep the door closed and use the quest bathroom.  some one suggested it may be a plugged exhause pipe on the roof. What do you think? and what is the best way to check and fix this?
    Thanks in advance Pat

  2. nightwork4 profile image60
    nightwork4posted 7 years ago

    first off that gas is deadly i hope you know. it could be a cracked pipe leading to your toilet which you might not even be able to see because the pipe isn't visible without tearing up the floor. also to clean your stack you need to do two things. first feed a plumber's snake down it to see if it is blocked and then use a high pressure hose or at least a garden hose into the pipe on the roof and run water into it. leave the water running and check for leaks in your house. i do plumbing for a living so PLEASE listen to what i'm saying. like i said , sewer gas can kill. if you can't find out the reason by doing this call a plumber immediately.

  3. framistan profile image61
    framistanposted 7 years ago

    The toilet must sit firmly in place.  If the toilet moves a little when it is sat upon... then it only takes a few days or a couple weeks for the wax seal to loose its seal.  The way to test it is to sit on the toilet and get up... while a friend carefully watches the toilet and also watch the drain pipe under the floor to see if any movement occurs... such as the floor joist bending or flexing just a little. (Use a flashlight in basement to look at the pipe movement.) If movement of the toilet or pipes or the wood floor is seen when the friend gets up or sits on the toilet.... then that is the problem.  Floor joists might need re-inforcing (add more boards or support brackets to stop the movement.    Re-inforce and replace the wax ring again.

    Another problem is some floors have a floor drain.  If the water is evaporated out of the P-trap in the floor drain... then sewer gases can come up.  Just pour some water into the floor drain every few weeks to keep the floor trap full of water.

  4. faucetman886 profile image59
    faucetman886posted 7 years ago

    Vent pipe clogs are almost always due to leaves and debris building up in the pipe or sometimes small animals building a nest.The easiest way to clean one is to find where your vent pipe exits through the roof and use a high pressure garden hose to force water down the pipe and hope that it will dislodge the clog.The vent is just an extension of your drain lines so the water and clog will just wash down into your sewer source, If this doesnt work a sewer snake gently worked from the roof top down will also work but if too agreesive you can run the risk of breaking your vent connections. Good luck


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