Typically, CAD managers and other users create plumbing content. AutoCAD MEP 2023 toolset provides 2 types of plumbing content:
You specify systems (a type of style) for catalog-based content. A system stores properties that all building system objects assigned to the system can share. This gives a consistent look and feel to the systems in a drawing. See Working with Style-Based Content and Working with Catalog-Based Content for more information on content types.