For best results, it is not recommended that you customize rules. Part Rules are only intended to determine the best initial pipe and structure elevations during pipe creation. These are checked against the surface being referenced by the network parts. In the drawing, right-click a pipe and click Pipe Properties. In the Pipe Properties dialog box on the Rules tab, edit Rule set parameters such as minimum slope and depth to achieve the best results.
If you edit network parts, rules are never re-run automatically, to avoid inadvertent or unwanted changes to pipe or structure elevations. To re-run rules, use the Apply Rules command.