To Change Pipe Network Flow Direction

Because some pipe network rules rely on the flow direction assigned to pipes, this command lets you assign direction as needed so that rules can be applied properly.

The Change Flow Direction command is also useful when other applications using AutoCAD Civil 3D pipe network model data need to be able to determine flow direction within a network.

To change the flow in a series of connected parts, select a path by clicking on a starting part, and an ending part within a pipe run.

1. Select the pipe network.
   Note: Changing flow direction can only be performed on a single pipe network at a time.
2. Click Pipe Networks tabModify panelChange Flow Direction Find.
3. In the drawing, click a pipe or structure in the pipe network to define the upstream starting point for the flow direction change.
   Note: Although you can select structures as well as pipes when using this command, the feature affects pipes only.
4. Select a path for the flow direction change by clicking a pipe or structure to define the downstream ending point. You can continue clicking consecutive parts in a pipe network to define the path for the change flow direction.
   Note: You can click Undo at any time during this command to undo the previously selected part and path.
5. When you have finished defining the path for the flow direction change, press Enter to end the command and implement the flow direction change on the parts in the selected path.

   A prompt indicating that the flow direction has been successfully applied to the part(s) is displayed.