offsetting mainstack and correct use of 90 elbow with heel inlet

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by johnk, Aug 15, 2008.

  1. johnk

    johnk New Member

    Messages:
    5
    Hi,
    I am going to combine a two bathrooms in ranch style home with a basement into 1 large bathroom. The wall seperating the two bathrooms that will be removed contains the vertical mainstack. Their are no drains running into the stack above the bathrooms floor level so I believe this is called a drystack. Can I offset the existing stack 3ft so I can place it ino a different wall and still use the existing roof penetration?

    Also, I know you can't place a sanitary Tee on it's back, but can you place a 90 degree elbow with a heel inlet, with the heel inlet in the horizontal position? (i.e. a 3x3x2 abs fitting with a 3" side conected to a horizontal waste drain, the other 3" side is connected the vertical vent and the 2" heel inlet is horizontal)

    I can post a drawing of the vent stack if my description isn't clear.

    Thanks
  2. Master Plumber 101

    Master Plumber 101 In the Trades

    Messages:
    268
    Location:
    Wisconsin
    Post a description if possible. You can't use side inlets in Wisconsin, but we are not on a national code so I,m not sure if you can use that in your location. You can offset the stack, but send a pic and I or someone else can respond to you.
  3. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    The IPC allows a side inlet to be used in the horizontal position but neither a high or low pattern heel outlet 90 can be used in any position except vertical with the 2" pointing up.

    [​IMG]
    Last edited by a moderator: Dec 26, 2008
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,270
    Location:
    Cave Creek, Arizona
    ell

    A heel inlet elbow IS a tee.
  5. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    Why yes it is and a lot of confusion would be eliminated if the industry would have called them that in the first place.:D
  6. johnk

    johnk New Member

    Messages:
    5
    additional information

    Here are a few pictures and a hand sketched plumbing layout of the bathroom. To meet the size requirements for uploading files I had to reduce the resolution of the pictures, but hopefully they're still readable. I have started some of the plumbing, but want to make sure it is correct before I have it inspected. Based on input so far, it appears I will need to replace the elbow with the heel fitting with just an elbow and attach the tub drain somewhere else, which I showed in the layout. My big concern is that I can't offset the stack the way I did. If someone would review my layout I would greatly appreciate it. Thanks for the help.



    plumbing layout 1.jpg

    bath plumbing 1.JPG

    bath plumbing 2.JPG

    bath plumbing 3.JPG
  7. johnk

    johnk New Member

    Messages:
    5
    more information

    I forgot to add that I'm located in Colorado and the local building authority uses the 2006 IRC
  8. johnk

    johnk New Member

    Messages:
    5
    I posted more information earlier today
  9. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    If the 3" vertical on that heel outlet 90 is "dry" and recieves no waste than it can be used as it is positioned. You often hear that a sanitary Tee can't be installed horizontally and for the most part that's true. The exception is if the outlet is vertical and dry.

    [​IMG]
    Last edited by a moderator: Dec 26, 2008
  10. johnk

    johnk New Member

    Messages:
    5
    The 3" vertical on the heel outlet is dry so I guess I'm good with the way I installed it. Does everything else in my layout look OK? Thanks

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