To Modify Part-Based Pressure Network Parts to Follow the Elevation of the Reference Surface

Select a pressure network in profile view. The Pressure Networks contextual ribbon tab is displayed.
On the Modify panel, click Edit Network Profile Layout Tools Find. The Pressure Network Profile Layout ribbon tab is displayed.
On the Modify panel, click Follow Surface Find.
Select the parts that you want to edit. Press Enter.
Specify the depth below the surface to move the parts. A positive depth value moves the parts below the surface. A negative depth value moves the parts above the surface.
Review the resulting pressure network parts in profile view and edit the parts as required.