Hi @eddymeyer. Have you looked at this article to help you get started: https://knowledge.safe.com/articles/595/autocad-to-ifc-conversion-example.html ?

If you require further assistance, sharing a few more details will help the FME community help you. Please reply to this thread and provide additional details including:

• The version of FME you are using, including build number and edition
• A small sample of your data, or screenshots of the data in the FME Data Inspector
• A description of your expected output, with screenshots if possible
• Your FME workspace
• Your FME translation log file
• Any other information that may be useful to share

@eddymeyer just adding that more work has been don on the FME Civil 3D reader in FME 2017.1 so that pipe networks and pressure pipes are now supported