For the larger projects that my company works on we more often use MC Cable, a flexible conduit, but REVIT only has the option for hard pipe, and wire.
I can't understand why REVIT doesn't have a conduit option with Spline-like functions to allow for moveing up, down left and right around the other trades pipes and equipment. What are the chances of ever seeing a little love for the E in MEP Revit, and getting a more realistic material to be able to be modeled. BIM is supposed solve problems before the field not cause questions and concerns when the hard pipe conduit is going right through the the plumbing when in reality it will just be flexing around without the addition of time consuming 45s and 90s. Please Autodesk at least create a plugin that will make this available.