Very valuable to have a credible source shine some light on this question. I'd heard pretty much the same thing that you have pointed out Friday on a radio talk show but I wasn't going to run off and embarass myself by posting as if I knew anything about plumbing licenses.

Nope, Joe isn't a bad person. He just asked a question and the foolish answer is the real story.

Okay, my place was built in 1933 and when I'm in the basement I can see the drain from my bathtub but I can't find any... Oh well, another time.