Until March 2015 in the Autodesk //LABS, you can try FABmep Import.
The FABmep Import for Revit MEP is a free technology preview that enables users to import Autodesk Fabrication FABmep models into Autodesk Revit MEP software, providing round-tripping capabilities for as-built/record drawing purposes.
https://beta.autodesk.com/callout/?callid=0D80FEC22D174140B2CBF01150894C40