A sewer jetter is a long, flexible, high-pressure hose with a jet nozzle on one end. The nozzle typically has a front-firing jet to break apart clogs, and back-firing jets that propel the jetter hose forward into dirty drains and scrub the sides of the pipes. The other end of the sewer jetter has a fitting that attaches to the spray wand or trigger gun of your pressure washer. Water from the high pressure pump is delivered to a hose reel containing high pressure jetting hose matched for the pressure and flow of the system. When a nozzle is attached to the end of the jetting hose, pressure is created within the system. Every nozzle is designed to direct high pressure streams of water to pull the high pressure jetting hose through a pipe. Angles of the water stream can be varied; water streams directed more toward the pipe wall surfaces produce better cleaning results while diminishing the pulling power of the nozzle. Water streams directed towards the centerline of the pipe provide maximum pulling power but decreases pipe wall cleaning effectiveness.