Step 1. The app will install the content to CPak Common. "C:\ProgramData\Autodesk\C3D 2026\enu\Pressure Pipes Catalog". The app will automatically detect the latest version of your Autodesk® Civil 3D® installed in "C:\". 

Step 2. Load the catalog and start to use.

For more information, please check the help document in the installation folder.

A catalog support folder exists in this location:

• Windows 10/11: C:\ProgramData\Autodesk\C3D 2026\enu\Pressure Pipes Catalog.

To uninstall this content pack, please go to Control Panel => Programs and Features => Select the "Steam Pipe Fittings Valves (Pressure Network)" => Uninstall