I have a question that does require an immediate response. I am trying to get my top out rough in inspection at a restaurant where the units separating walls are 1 hour fire rated. The inspector will not pass my rough in as it is his belief that: 1) - My drain and vent piping (pvc) is not supposed to be inside of a 1 hr rated wall (a combustibility issue). Even though as an up-fit project there was already PVC in wall. 2) - To remove existing plumbing we removed the 5/8" wall board and installed our new plumbing in same wall. Inspector says and I quote "I don't know how you can repair drywall to 1 hour rating, so I can't pass your plumbing till I find out". I am at a total loss on what to do with this guy. Any help???