Heat exchangers in thermal power stations or conveyor pipes in the food industry are often sewers of 10 to 12 mm in diameter. In order to clean them effectively from the inside a device for sewer cleaning with small diameters and high press is required. Being only 9.8 mm in diameter the nozzle withstands the working press of up to 500 bar. Together with our r+m 1 / bronze hose (30420) the complete sewer cleaning unit will be rated up to 300 bar and 100° c.