This script should show how easy (or hard) is to import CAD objects to Dynamo and to use them to create installations like pipes, ducts or cable trays.
The script has two issues, it can not create tee fittings without some improvement and all created installations will be with the same dimension and on the same heights if we do not prepare the ACAD file differently.
The script is edited by me but it was originally created by SPARTAN, more about that: https://forum.dynamobim.com/t/create-pipe-from-dwg/3308/35
Please make sure that before you start using this script that you back up your existing project model.
Also, if you want to download this (and all other scripts) with my sample files please visit the Shop page.
The script uses the following Dynamo packages: BimorphNodes v.3.0.3 MEPover v.2019.12.1