Please help! Lingering sewer smell in house

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Clairelucky, Jun 2, 2017.

  1. Clairelucky

    Clairelucky New Member

    Joined:
    Jun 2, 2017
    Location:
    Delaware
    Hi, In our recently bought house, there is open laundry area in basement. There is a standpipe for washer. Then we smell sewer ordor around the area. we called a plumber, He flushed the stand pipe with water and said the p trap is okay because there is water in it. But somehow, I can still smell the ordor from the pipe. He suggested installing an air vent, but he cannot guarantee that it will work. We tried to seal the pipe, but still there is smell. Now I am confused whether the smell is coming from. I am posting a picture here. Would you please see whether the standpipe is set up correctly, will the air vent solve the problem? Thank you very much ! I am really frustrated with the smell.
     

    Attached Files:

  2. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    Normally you would have a vent on the p-trap and standpipe. And yes, it's not plumbed right.

    Sometimes the smell in the walls or flooring.
    Zerolac can be used to paint over wood that has an odor to seal it off.
     
    Last edited: Jun 4, 2017
  3. Sponsor

    Sponsor Paid Advertisement

     
  4. dj2

    dj2 In the Trades

    Joined:
    Aug 13, 2013
    Location:
    California
    Who ever plumbed it "forgot" to vent it...
     
  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    Over time, a standpipe might end up with a coating of soap scum - the water generally moves fast enough to scour the pipe fairly clean, but maybe not always. A long bottle brush and some elbow grease might clean it up, but otherwise, if the trap is not getting sucked dry or siphoning, that's not the problem. When it smells, use a flashlight and verify that there's still water in the trap. It might just take certain things happening to suck it dry, and when the plumber looked, it was fine, but it might not stay that way all of the time.

    Do you have a floor drain somewhere? If those do not have a trap primer, they'll dry out and can be a source of sewer gasses.
     
  6. MACODEDOC

    MACODEDOC New Member

    Joined:
    May 28, 2017
    Location:
    Massachusetts
    WELL LETS LOOK AT BASIC PLUMBING, WHEN WATER IS DISCHARGED YOU CREATE A NEGATIVE PRESSURE IN THE PIPING. IF YOU DO NOT HAVE PROPER VENTING YOU ARE SUBJECT TO A VACUUM AND TRAP SEAL LOSS. TRAPS ARE DESIGNED FOR A PLUS OR MINUS 1", THIS IS THE ONE THING WE OVER LOOK, WINDY AREAS CAN MAKE THE TRAP SEALS JUMP AND EVENTUALLY LOOSE A SEAL. WITH THAT SAID THE TRAP IS NOT VENTED OBVIOUSLY AND WITH THE HOUSE DISCHARGING AT THAT CONNECTION POINT THE MOMENTUM COULD DRAW THE SEAL AWAY FROM THAT STAND PIPE OR ANY TRAP IN YOUR HOUSE FOR THAT MATTER.

    WATCH THIS VIDEO
     
  7. Clairelucky

    Clairelucky New Member

    Joined:
    Jun 2, 2017
    Location:
    Delaware
    thank you guys all! It's very very helpful. I will get a vent installed, hope it will fix the problem.
     
Similar Threads: Please help
Forum Title Date
Plumbing Forum, Professional & DIY Advice Looking for a tool to remove a 6" countersunk cleanout plug...please help. Thursday at 4:41 PM
Plumbing Forum, Professional & DIY Advice Dishwasher draining help please - multiple possibilities? Oct 13, 2021
Plumbing Forum, Professional & DIY Advice One well, two houses-one water has coliform, one does not - HELP, please! Oct 13, 2021
Plumbing Forum, Professional & DIY Advice Sewer gas leak - help please! Aug 7, 2021
Plumbing Forum, Professional & DIY Advice Need help with drain seal - Please! Jun 30, 2021

Share This Page