For an effective use of high-pressure cleaning, a precise knowledge of the occurring pressure losses is very important. A distinction is drawn between:

• Pressure loss at the vehicle,

• Pressure loss in the high-pressure flushing hose and

• Pressure loss in the nozzle.

Both nozzle pressure and volumetric flow rate can be optimized by choosing the appropriate high-pressure flushing hose, nozzle and nozzle inserts. Given an equal pump output, the required sewer cleaning operation can be performed faster and more cost-effectively [Geib2002].