ROCKSTARPLUMBER· I aint CPV see in it?
I did house plumbing briefly back in the 80’s, including being on a slab only crew. My boss would walk on my pipes in the ditch and check every pipe for slope. ANY flex was not acceptable. He would smoke weed/ drink 12+ beers a day on the job but he taught me well.
I was about taught the same way, but man did they know their sh!t. I sent the OP in the right direction that should net him some responisve results from the plumber and GC. I cant stand that kind of game and come across it all the time.