High-pressure water jetting uses water delivered at pressures typically between 2,000 and 4,000 psi through specialist nozzles to scour pipe walls and dislodge fats, silt, scale and soft root mass. The jetter hose is fed from an upstream chamber and the rear-facing jets propel the nozzle along the pipe while forward jets cut into the obstruction. It is suitable for residential 100mm to 150mm runs as well as larger 225mm commercial lines, with operators following the Water Jetting Association Code of Practice. The technique addresses common causes of recurring blockage but will not repair structural defects and may worsen damage in collapsed or heavily fractured clay. A pre-clean CCTV survey is advisable to confirm the pipe can withstand the working pressure.
High-pressure water jetting (hydro-jetting)
Cleaning method using pressurised water to scour pipe walls and clear blockages.
