Abstract: A municipal sewer cleaning system for efficiently cleaning a below grade municipal sewer line features a vacuum service truck having a vacuum source fluidly connected to a flexible vacuum hose, a compressed air source fluidly connected to a flexible air hose, and a pressurized water source fluidly connected to a flexible water hose. The system features a collar assembly having a rigid inner collar and an inflatable outer collar connected to the air hose. A tapering semi-cylindrical skirt is Ideated on a collar second end and a rigid ninety degree reducing elbow is located on a collar first end. The reducing elbow is fluidly connected to the vacuum hose and features a trough located on an elbow outside wall with a plurality of roller units inside. The water hose slides within the plurality of roller units.