bad sewer odor from sink

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by myex94, Apr 7, 2014.

  1. myex94

    myex94 New Member

    Messages:
    2
    Location:
    california
    our place is townhouse three years old town house we have restroom at first floor and the bathroom second floor and one extra sink Is out side next to the bedrooms after second year I start smell sewer odor from that sink I check the trap I open I clean was clean because house is brand new build I even clean overflow hole was clean that too I check the trap pipe there is a water in that trap so that means Is ok water should block that smell, as soon I empty one gallon bleach (Clorox) in the sink 2 month no smell at all after couple month the smell Is coming back again I have to empty one gallon bleach and smell goes away till couple month again smell comes back now lately the first floor restroom I start smelling that odor too from the sink please help any one can help me what is the cause to have that sewer odor ?
    thank you

    I want to remind again after I poor one gallon bleach ( Clorox) the odor goes away for couple month and I clean the over flow is clean remember my house is brand new build. And this a photo under my sink the trap

    Attached Files:

    Last edited: Apr 8, 2014
  2. Smooky

    Smooky Member

    Messages:
    596
    Location:
    NC
    Might be a bad Air Admittance Valve (AAV). I picture of the plumbing under the sink might help
  3. jennifersmith

    jennifersmith New Member

    Messages:
    11
    Location:
    Australia
    Hi,

    It can cause because of if the water in the trap was either being sucked out or leaking out. You can put some drain care and X14 cleaner down the sink overflow. It took a few days or times, but it finally cleared up.

    Hope helps you!
    Last edited: Apr 8, 2014
  4. myex94

    myex94 New Member

    Messages:
    2
    Location:
    california
    I add a pic under from under sink
  5. Terry

    Terry Administrator Staff Member

    Messages:
    14,889
    Location:
    Bothell, Washington
    That trap looks fine.

    It may be from the overflow. There is a small passage way from the overflow to the drain that can have smells.
Similar Threads: sewer odor
Forum Title Date
Plumbing Forum, Professional & DIY Advice, Tips & Sewer gas odor when basement shower is in use Feb 22, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Intermittent Sewer Odor - Wax Ring? Nov 21, 2012
Plumbing Forum, Professional & DIY Advice, Tips & Sewer Gas Odor from the Toilet Jul 28, 2011
Plumbing Forum, Professional & DIY Advice, Tips & sewer odor from tub Nov 16, 2007
Plumbing Forum, Professional & DIY Advice, Tips & Sewer odor smell Aug 5, 2007

Share This Page