After installation, you can open the catalog in Spec Editor

Create a new spec and add all components from the catalog to the spec. 

Load the specification created in Autodesk® AutoCAD® Plant 3D and use the available part in your projects.

Installation notes:

These catalogs are compatible with AutoCAD Plant 3D 2019 & higher versions. This installer will copy the catalog “HESU HDPE Pipe Fittings catalog -Metric.pcat” into your content catalog location. The default location is: C:\AutoCAD Plant 3D 2025 Content\ CPak Common\HESU HDPE Pipe Fittings catalog -Metric.pcat \

Uninstallation notes: 

To uninstall this content pack, please go to Control Panel => Programs and Features => select the " HESU HDPE Pipe Fittings catalog -Metric " => Uninstall