The Rotary Jet ("RJ") is a revolving nozzle utilizing the combined forces of 0 degree & 45 degree angles rotating under pressure, creating a continuous "wall of water" to maximize line restoration.  A valuable feature of the RJ is the field replaceable rotor which extends the nozzle's service life. Each and every RJ is tested before shipment to assure it's rotational capabilities. Please note that due to the close tolerances between the moving parts of a spinning nozzle, we recommend that before using the RJ nozzle in any drain line, that a preliminary cleaning pass has been made with a BN or J Type nozzle first.