Hi. I have a 3" PVC Sani-Tee in Vertical position on the 2nd story floor. The middle hole is downstream from the toilet and the top hole is used for a vent and has a 3" to 2" reducer. When doing my DWV water test I found a leak where the 3" Tee meets the 3" reducer (a 3" length of 3" pipe was used to join them). Just to be clear, the leak is on the top of the vertical Tee, which is the vent and will not have fluids running past it or be under pressure, unless there is a huge clog.
Unfortunately, I cannot remove the Tee without a tremendous amount of time and cost (removing HVAC rough in, a bunch of PEX and framing/flooring). I guess I should've air tested that section before the other stuff was installed but I didn't and I took my time gluing it. Murphy's law strikes again but this is the only joint, out of over a hundred, that leaks in the whole house! Since the Tee and 3" reducer are butted tight I can't cut out a section of 3" PVC even if I could get to it.
Is there a way to seal that joint? I will be getting this inspected and I'm in NJ.