Sewer Gas at Washing machine

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Tanias55, Oct 5, 2005.

  1. Tanias55

    Tanias55 Master Plumber

    Messages:
    1
    First off, Iam totally embarassed to ask this question. I am a Texas master plumber and have been so for 30 yrs. I plumbed a new house around a year ago using Pvc sch 40 drain and vent lines. I plumbed the washer drain with 2"drain going directly into 3" drain some 5"away and 1 1/2" vent. The trap T's off the vertical vent close to the floor. We ran vent towards back of house about 20' making sure it had correct rise on it. Now when the homeowners
    Run washer they get a sewer gas smell occasionally from washer drain. So I thought it must be vent, I cut vent going towards back of house and installed an Auto vent in attic. Which are considered legal in our area. This took care of problem for around 2 monthes, now They are getting it again. Any ideas would be greatly appreciated. Something I just thought of. This house happens to be last house on this branch of sewer main. I wonder if sewer main could be building up enough gas to affect washer drain since its the most water going down sewer at a time. I might try installing 4" running trap on sewer coming out of house?
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,110
    Location:
    Bothell, Washington
    I would shine a flashlight down the standpipe and see if water is in the trap.

    Is there a floor drain in the room too?
  3. Cal

    Cal New Member

    Messages:
    228
    Location:
    Northern Virginia
    T ,

    NO shame in asking ! We all scratch our scarred up heads pretty often !

    I've had a washing machine start to stink real bad before and my customer SWORE it was the stand pipe. It WAS the washer .

    How about putting in a laundry tub and draining it there ? Or a check valve somewhere in that 2" line?
Similar Threads: Sewer Washing
Forum Title Date
Plumbing Forum, Professional & DIY Advice Sewer Smells from Washing machine Drain Jun 22, 2011
Plumbing Forum, Professional & DIY Advice Sewer smell from my washing machine? Jun 12, 2009
Plumbing Forum, Professional & DIY Advice Sewer Gas Coming From Washing Machine Drain Pipe Feb 11, 2007
Plumbing Forum, Professional & DIY Advice Long sewerline run... lift needed? Sep 30, 2014
Plumbing Forum, Professional & DIY Advice Help with Sewer gas in Laundry Room?! Sep 24, 2014

Share This Page