The cleaning quality is influenced by the quantity of water used in the procedure (volumetric flow rate), the speed at which the nozzle is pulled back through the sewer, the pressure and effectiveness of the pressurized water jets, and the following nozzle features:

• Nozzle type

• Size, geometry and weight

• Number and diameter of the nozzle inserts

• Material of the nozzle

• Material of the nozzle inserts

• Pressure losses within the nozzle (jet deflection)

• Jet angle (angle of the water jet relative to the longitudinal axis of the sewer)

• Jet shape (flat or round)