SEWER / TUBE CLEANING NOZZLES - ST-49 & "MINI"The reverse jets on the fixed and rotary nozzles pull the hose through the tube or sewer line and blast debris from line or tube walls. PSI: 4200 Physically Small for Cornering Ability Corrosion resistant Stainless steel Construction Backward Ports Drive the Nozzle Forward and Flush Debris Orifice Size Indicated on Non rotating Styles Forward Ports Blast into Pipe and Breaks Up Clogs and Debris Rotating Style Adds Extra Agitation and Surface Cleaning