Earlier this year, I posted about creating a sanitary to vent system since Revit does not have a default way of showing where the piping changes from sanitary system to a vent system. (Read it here.) There are times when this simplified process does not work, so this post shows a 2nd method to accomplish this task. This 2nd method utilizes a newly created family to act as a transition between the two systems. It is a simple pipe fitting family that can be inserted into a pipe to create the transition.