High Velocity Sewer Jetting - Quick, economical and environmentally safe, this service can be used on many types of pipe. Using state-of-the-art pumps and flexible hoses, water is propelled under varying amounts of pressure into the sewer line. A special nozzle mounted on the end of a heavy-duty hose has an array of forward and reverse jets to direct powerful cleansing streams of water all the way to the pipe walls, cutting through even the toughest blockages.