OK, I don't have a good picture, but mine looks very much like this one:
It looks like these are available in both 1-1/4 and 1-1/2.
So I guess a better question is, does anyone know exactly
which one to purchase to replace this connection?
My leak is between the 90 and the horizontal part, the horizontal one with the ridges that could be finger grips, in the picture at the link above.