How to splice a hub'd wye into existing drain pipe?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Geekything, May 25, 2016.

  1. Geekything

    Geekything New Member

    Joined:
    May 11, 2016
    Location:
    Ontario
    This is probably a dumb question for the pro's....but here goes.

    I have a horizontal 3" drain that I need to connect a toilet drain into. The existing train won't budge at all on either side and the access to it is VERY restricted.

    I need to install a 3" hub'd wye (because I've already read the chapter about not using a tee). If I cut the pipe so I can insert the wye, there won't be enough pipe protruding into the wye's hubs to allow for glueing (obviously).

    How does one proceed? I can't seem to find a flexible collar wye -- only tees.

    Thanks!
     
  2. Smooky

    Smooky In the Trades

    Joined:
    Apr 4, 2011
    Location:
    North Carolina
    Why don’t you cut short sections of 3” pipe and glue into the hubs. Cut the horizontal section so the new section will fit close. Then attach the wye with short sections of pipe to the existing horizontal pipe with banded fittings.

    http://www.supplyhouse.com/Fernco-3...-Cast-Iron-to-PVC-Steel-Extra-Heavy-Cast-Iron

    You might be able to save a little bit of space by using 3" PVC DWV Street Wye.
    http://www.supplyhouse.com/Spears-P602-030-3-PVC-DWV-Street-Wye?gclid=CNfOj9Pb9swCFQckhgodSYsAbQ
     
    Last edited: May 25, 2016
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  4. Geekything

    Geekything New Member

    Joined:
    May 11, 2016
    Location:
    Ontario
    Okay, so banded couplers are the way to go? I'd wondered about that but it seemed a little too MacGyver-like to be the professional route :)

    Thanks for the tip on the street wye...that would definitely help.
     
  5. hj

    hj Master Plumber

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    You CANNOT just "cut a Y into the line" to install a toilet. You also have to consider HOW you are going to vent it.
     
  6. Geekything

    Geekything New Member

    Joined:
    May 11, 2016
    Location:
    Ontario
    I have an existing vent from the original toilet. I'm moving the toilet across two joists and need to tap into the drain at a different point because of that. Moving the vent will be a piece of cake versus the drain.
     
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