No Hub Adapters

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by seaneys, Oct 31, 2008.

  1. seaneys

    seaneys New Member

    Messages:
    192
    Location:
    Chicago Suburbs
    Hello,

    The plumbing inspector is asking that I use a no-hub ADAPTER with the no-hug fitting in my dwv system. The connection is from 3" pvc to 3" pvc (not buried).

    Are these a common fitting? They are not referred to on the Fernco site and the local plumbing supply store was not certain how they should be used.

    Is there a special no-hub fitting / gasket for use with the adapters? The fernco no hub fittings look like they might be about 1/2 short.

    Thanks a ton!

    Thanks,
    Steve
    Last edited: Oct 31, 2008
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,416
    Location:
    Bothell, Washington
    A no-hub coupling is a "shielded coupling" that prevents the pipes from "shifting",

    Attached Files:

    Last edited: Dec 5, 2008
  3. seaneys

    seaneys New Member

    Messages:
    192
    Location:
    Chicago Suburbs
    Hello,

    He's asking me to use the no-hub fitting in conjunction with a no-hub adapter. I have not run into the adapter before. It is a pvc fitting that looks like it will help to prevent the ends of the pipe from moving.

    I can not find anything about this on the web or my books.

    Thanks a lot!

    Steve

    Attached Files:

  4. Terry

    Terry Administrator Staff Member

    Messages:
    15,416
    Location:
    Bothell, Washington
    Well, that would be a nicer way of doing it. I think I may have seen "one". before.
  5. Redwood

    Redwood Master Plumber

    Messages:
    7,450
    Location:
    Connecticut
    What the inspector wants.... The inspector gets....
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,247
    Location:
    Cave Creek, Arizona
    adapter

    The bead would make a tighter connection, but good luck finding one. I have NEVER seen one in the past 5+ decades. I have used them for copper because of the disparity beteen the pipes' o.d.'s but never for schedule 40 PVC or ABS. BUT they could require a pipe specific transition coupling, with the lable on top so he can see the types of pipe it is sized for, instead of a No-Hub coupling.
  7. elvisclock

    elvisclock New Member

    Messages:
    35
    The last company I worked for used them all the time.We did not transition from cast to pvc without them.
  8. seaneys

    seaneys New Member

    Messages:
    192
    Location:
    Chicago Suburbs
    I feel like throwing a party. The rough-in passed once I put in the no-hub adapters. My general contractor told me that the inspector failed two of his other jobs for the same reason I ran into.

    The only other mistake I made was using a standard 90 degree bend when I went from horizontal to vertical (instead of a long bend). I can't believe I missed that.

    This forum has been a huge help.

    Steve
  9. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,247
    Location:
    Cave Creek, Arizona
    bend

    I have never even seen a PVC or ABS no hub adapter ANYWHERE I have ever been, not had an inspector even mention wanting one. A long turn elbow is needed to go from vertical to horizontal, not horizontal to vertical, so unless you are referring to an upstream transition, he was being unrealistic.
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