Figure 1

To address this issue, within AutoCAD MEP enter the command CONVERTTO3DSOLIDS and select the conduit to convert the conduit into an AutoCAD solid. Once this is done, link the file back into Revit and the conduit will appear correctly.
Figure 2


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Ron has 23+ years of experience in the AEC industry as a designer, lead project designer, trainer and CAD manager. His instructional background includes Autodesk Certified Instructor, trainer, support technician, educator at Portland Community College and Clackamas Community College, and a U.S. Army certified instructor. Follow Ron @RonPalmaAEC.
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