Cannot really understand your question.
Are you trying to import AutoCAD MEP into ArchiCAD, or do you somehow want to export ArchiCAD elements in a way that they show up in AutoCAD MEP as MEP elements?
Please give your version/platform information.
The ArchiCAD MEP add-on (extra cost option) lets you import AutoCAD MEP.
Cheers,
Karl
AC 28 USA and earlier • macOS Sequoia 15.3, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB
One of the forum moderators