How's this DWV?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by orbea1, Jan 23, 2008.

  1. orbea1

    orbea1 New Member

    Joined:
    Jan 9, 2008
    Looking for input on my DWV for 3 lav's.
    Planning on everything being 2 inch cpvc. Assume 1/4 slope for the horizontal drain.
    Questions:
    1. The 90 elbow will be in a stud wall. Will that work?
    2. Do I even need the vent for the double lav?

    3lav1.jpg

    3lav2.jpg

    3lav3.jpg

    Thanks,
    Amy
     
  2. Redwood

    Redwood Master Plumber

    Joined:
    Dec 15, 2007
    Occupation:
    Service Plumber
    Location:
    Connecticut
    Close but no cigar! On the 2 closest to the verticle drop you have constructed an s-trap. Review your use of horizintal sani-tees.
     
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  4. Dunbar Plumbing

    Dunbar Plumbing Master Plumber

    Joined:
    Apr 18, 2005
    Occupation:
    Service Plumber, Outdoor Temperature Relief Owner
    Location:
    Northern Kentucky/Greater Cincinnati Area
    The furthest fixture on the drawing is fine only if that vent is 42" up before it goes horizontal.


    The two lavs need to be vented off tees, combined on the vents and go horizontal as one and on up. That involves 42" or higher as well.
     
  5. jimbo

    jimbo Plumber

    Joined:
    Aug 31, 2004
    Location:
    San Diego
    All the vents must be 42" above the floor before they go horizontal.

    The fixture drains must connect to the main with a wye and 45, not the santee shown.
     
  6. orbea1

    orbea1 New Member

    Joined:
    Jan 9, 2008
    OK, let's try this again. SLightly different Design

    Horizontal vents will be at least 42" above floor or 6" above flood level of the lav.

    Is the 90 Ell in the wall going to be OK?
    3lav1.jpg

    3lav2.jpg

    3lav3.jpg
     
  7. cwhyu2

    cwhyu2 Consultant

    Joined:
    Aug 11, 2007
    Occupation:
    Consultant
    Location:
    Cincinnati OH
    Looks good to me.Eccept showervent should same hight as lav vent.
     
    Last edited: Jan 24, 2008
  8. orbea1

    orbea1 New Member

    Joined:
    Jan 9, 2008
    Thanks. That is actually a third lavatory. But I will make all the vents the same height.
     
  9. cwhyu2

    cwhyu2 Consultant

    Joined:
    Aug 11, 2007
    Occupation:
    Consultant
    Location:
    Cincinnati OH
    Your welcome . thougt was a shower pipe it like the other two good to go.:)
     
  10. ltnicks

    ltnicks New Member

    Joined:
    Jan 23, 2008
    the 90's will work in this scenario, the drawings look good, only the numbers for pitch, height, minimum, and maximum are left out.:)
     
  11. Lakee911

    Lakee911 I&C Engineer (mostly WWTP)

    Joined:
    Aug 23, 2005
    Occupation:
    I&C Engineer (mostly WWTP)
    Location:
    Columbus, OH
    I see some offset joints. Might get a clog there :)
     
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