We are currently having our house built and it is in the stages of being framed. We have heard bad things about the plumber that the GC uses and I am starting to wonder if they are true. There is a pvc pipe (vent pipe?) coming out of the concrete crooked in the basement ( see pic ). Is this normal or just shoddy workmanship? Is it code for this to be tied in with the existing stack? Thank you for anyone that can shed some light on my issue.