Here is a Part Builder structure based on a Louisiana DOTD Safety End Treatment. I'm not sure it is perfect, but it does what I want it to do.
How you can add it to your catalog
I would recommend creating a new chapter in your Part Builder for this new part. Creating a new chapter will create a sub folder within the Pipes Catalog folder. The folder location can be assigned through the SetNetworkCatalog command.
Once all of that is complete, I believe you can extract all of the files in the attached zip file into this new chapter's sub-folder. You would then need to Regenerate the Catalog to have this new part recognized.
If you have any questions, I'll try to answer them. Be aware, it has been more than two months since I created this and I may have forgotten some steps.