A no-hub coupling is a "shielded coupling" that prevents the pipes from "shifting",
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!
Last edited by seaneys; 10-31-2008 at 01:08 PM.
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!
What the inspector wants.... The inspector gets....
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.
The last company I worked for used them all the time.We did not transition from cast to pvc without them.
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.
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.