High-Pressure Drain Jetting
Jetting does more than punch through a blockage. Done properly, it can wash grease, silt and soft deposits off the pipe wall and carry the loosened material back to the access chamber.
How the hose moves through the drain
The rear-facing jets pull the hose into the drain and drive loosened debris back towards the chamber. A grease nozzle, root cutter and descaling head are different tools; the operator should choose one for the material actually inside the pipe.
What jetting is good at
- grease and fat deposits
- silt and soft debris
- some root masses when suitable cutting equipment is used
- residue left after a blockage has been opened
What jetting will not fix
If jetting clears the drain but roots or paper keep catching at the same measured point, the pipe itself needs looking at. Water pressure will not close an open joint or restore a section that has collapsed.
Good jetting is more than turning up the pressure
Effective jetting also depends on nozzle choice, water flow, access and knowing what the pipe is made from. A nozzle suited to soft grease is not necessarily the right tool for roots or hard deposits. On very old, fragile or already fractured pipework, aggressive cleaning without understanding the condition of the drain can be unhelpful.
After cleaning a recurring blockage, the camera view should show the bottom of the pipe and the joints clearly. If it still shows only dirty water or grease, the survey has not yet answered why the blockage keeps returning.
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