As many of my posts start out, this one comes from one of my clients. He was using the Pressure Networks in Civil 3D 2015 and noticed that when he added the inner diameter of the pipe to a label, it came up with question marks.

Question Marks for Inner Diameter

Question Marks for Inner Diameter

To add to the confusion, even though there is a property in the pipe object for inner diameter, it was grayed out and couldn’t be changed.

Inner Diameter Can't be Edited

Inner Diameter Can’t be Edited

So, this got me to thinking, there’s got to be some way to add that information to the pipe! Well, let’s go edit the catalog. If you aren’t familiar with it, you can edit your pressure network catalog using the Content Catalog Editor.

To open your Content Catalog Editor, go to your Windows Start Menu and find the location where you can start Civil 3D, there you will also see the Content Catalog Editor.

Content Catalog Editor Start

Content Catalog Editor Start

In the Content Catalog Editor (CCE), open your pressure network catalog. Civil 3D comes with three of them, choose the one you are using or the one you’ve created for your company. In this example, I’ll use the pushon catalog. By default, they can be found here for the imperial catalogs:┬áC:\ProgramData\Autodesk\C3D 2015\enu\Pressure Pipes Catalog\Imperial. Change the obvious for metric.

Once the catalog is open, go to your pipes, and add the property for your inner diameter.

Edit the Inner Diameter

Edit the Inner Diameter

One thing to note, most 8″ pipe does not have an inner diameter of 8″. One manufacturer of C900 PVC pipe had 8″ PVC that varied from 7.26″ to 8.28″ depending on the pressure classification.

Now that the catalog has been modified, you’ll need to restart your Civil 3D and replace the pipes in your drawing that are missing the inner diameter. Unfortunately, I don’t know of a way to update the pipes that are in the drawing already (with the missing inner diameter) to show the new inner diameter in the catalog.