Did I say how helpful everyone is and that I am so glad I joined the group! Thank you everyone. Update: Pulled the Coreplast back and the pipe that enters the black tank has pulled away from the caulking/glue and has a steady leak. Why did this happen? No clue. I would be interested to hear the groups thoughts. I do not see anywhere else where there is a leak. Fairly simple fix so far (even though a stinky one!)

To PROPERLY glue plumbing pipe, there is a cleaner, a primer and a glue.

My bet...it was not cleaned or primed first.

Or they did not hold the parts together before it had time to set.

It boils down (yet again) to quality control...

I wouldn't call a leaking pipe on a 4 year old fifth wheel a quality control problem. They all have problems, especially the older they get and the more they are used. Expect problems, fix it and move on....

I wouldn't call a leaking pipe on a 4 year old fifth wheel a quality control problem. They all have problems, especially the older they get and the more they are used. Expect problems, fix it and move on....

It would depend on the amount of usage of the RV. If one leaves it in storage, they may never see a leak. If one uses it frequently, it could take time before it backs out.

In 35 years of off and on plumbing, sanitary drain line, condensate drain jobs, I don't have leaks. It's done right. Pay me by the piece, things might be different...

Not trying to offend. I've seen and read about a lot of people who have this exact same problem due to poor craftsmanship. There is just so little attention to detail.

It could be that it just failed. I won't put my money on that one though. There is always a reason why things fail. You just gotta analyze each one...