The purpose of this toolbar is to check for flow direction errors in the Storm Water dataset. All storm water lines should end their flow at an outfall, if they do not end their flow at an outfall, that is an error. The main flow check toolbar checks for endpoints that do not flow downwards to end at an outfall. This tool can be ran on either your current selection, or the entire dataset. This will find error such as wrong directional flow and improperly snapped lines.