A grout mix meant for soil stabilization found its way into a vitrified clay sewer main pipeline during supportive construction for subway tunneling. The slurry settled inside the pipe causing a serious blockage.

Root infiltrations from pipe joints and lateral connections are no problem for 500 bar (7,250psi) precision water jet cutting. Multiple massive root infiltrations are blasted into wood pulp and removed within minutes.

Limescale, the cristalized mineral deposits often found in sewer pipelines of hard water areas, has been succesfully removed from multiple sewer pipelines in the Swiss Alps by H.Jakober with the Sewer Robotics water jet system.

The calcium carbonate had build up over many years and was so hard that it required up to 2500bar (36,250psi) to remove at some sites.

The Sewer Robotics’ robot R160 with the attached water-jet nozzle tool WJ180 was inserted into the pipe. A pump unit with up to 14,000 bar @ 18 LPM (20,000psi @ 10gpm) provided variable water-jet pressures throughout the cleaning process. After 3 days approx. 45M (150ft) of 30″ pipe were clean and the debris removed. All this without any interruption of the plant operation.

Calcium mineral deposits had built up over years in this 250mm (10″) PVC pipeline and were removed with the Sewer Robotics water jet system.

The calcium broke loose in pieces as soon as the water blast penetrated the deposits and were removed with the jetter truck. The PVC host pipe remained untouched.