Refer to this section for high-level descriptions of tasks that you might perform when working with pipe networks in AutoCAD Civil 3D.
You can use LandXML features to import existing pipe data into your drawing, or to export pipe data from an AutoCAD Civil 3D drawing. For example, to bring pipe data into AutoCAD Civil 3D from an AutoCAD Land Desktop project, you can export pipe data from AutoCAD Land Desktop using the Export LandXML command, and then import it into AutoCAD Civil 3D using the Import LandXML command. For more information, see LandXML Import and Export.
If you need to perform hydraulic and or hydrology design and analysis tasks, you can use the hydraulics and hydrology extensions that are provided with AutoCAD Civil 3D. They enable you to perform a variety of hydraulics and hydrology tasks on AutoCAD Civil 3D pipe network models. For more information, see Hydraulics and Hydrology Features.