How do you use a pancake box without screwing it to the vent pipe. I realize the vent pipe normally has no water in it, unless it's melted snow or rain coming in from the roof, but even if you do mount it to the vent pipe, it sets back in the wall about 1" or so, making a big gap in between the box and the sheetrock, not to mention the long screws that would be needed to mount the hanging bar. If the vent pipe is off center just a little bit, it makes it worse, because then you can't get a cut in box in, and not a centered surface to mount a pancake box.... Any other ideas. This is an old problem for me and very aggravating. It would be good if the plumbing code wouldn't allow this. Maybe I could put in a request for their code panels to look into this
