I have 3/4" stubs coming out of a finished wall. I would like to reduce it to 1/2" on some shorter sections. Right now we only have combo boxes to achieve this, which should be supported. I'm sure (really hope) they make a coupling that would reduce 3/4 to half inch. I thought I seen them on a job. They have to be made in the u.s. And have to be compression. No luck on Google. Is their a trade name or something I'm missing? ... Reducing bushings comes to mind.... ?? Not sure. Anyone know the proper name?