Originally Posted by DannyT
is this a plumbing vent this is draining into?
Yes, I believe so. It is that pipe that runs up through the roof of the house. Also, after I applied the pipe bonding putty, instead of dripping into the pan, it ran down the pipe and appears to have found a way out and onto the backyard patio. Once I cut the puddy off and put the drip pan back, no water on patio and no dripping in bathroom. I just bought something called "Rain-R-Shine" PVC cement. Maybe that might help.