The application works by determining the intersection of the two pipe centerlines in 2D (x,y coordinates).
The distance is then calculated from the upstream invert to determine the invert and obvert (crown) elevations of the respective pipes.
A leader with text is then added to the drawing showing the obvert (crown) of the pipe at a lower elevation and the invert of the pipe at the higher elevation.
The text is generated using the pipe style name.
The tool is useful for creating text labels for crossing pipes where necessary and saves a lot of time with manual calculations.