Is it possible with Revit to have mixed pipe types, Carbon steel and Copper in one pipe type or Carbon Steel and Malleable Iron? I'm setting up pipe types for our mechanical engineering company and running into an issue. I have been able to set them up but the transition from one material to the next creates the issue. I was trying to set them up to follow our material specifications. Carbon steel, buttweld 3" and larger and Copper 2-1/2" and smaller. How are you guys handling this?