It is a common occurrence for Engineers to provide modelers CAD drawings to trace. However, typically pipe systems are designated a solid color by virtue of them having a material assigned. So you may think that it would be a trivial matter to set the view discipline to mechanical and then to use a wireframe view, but in a complicated model this is often not as clear as one would think. In addition, between revisions of the CAD inputs, it is nice to see a colored overview of the cad lines with the pipes. It is then easy to pick up the differences between the revisions. BIM 360 Docs is also a great way to compare CAD revisions (it is easy to pick up differences).
In our case we are using a filter to override the pipe display and we switch off the pipe centreline, so it does not obscure the CAD link.
If you need help adopting Revit or BIM in your practice, please contact Micrographics so we may be of assistance.