What jetting pressures should be used on plastic sewer pipes?
A jetting pressure of 120 bar is more than adequate to remove all blockages from plastic sewer pipes.
Extensive research projects commissioned by TEPPFA and its member organisations have established the following facts with respect to water jetting of sewers :
- Tests carried out by Loughborough University in the UK demonstrated that a pressure of 120 bar is sufficient, for all pipe materials, to remove any blockage likely to occur in service.
- Independent tests conducted by the Danish Technological Institute confirmed that plastic sewer pipes (solid wall and structured wall) were not damaged when subjected to a jetting pressure of 120 bar for 50 cycles.
- Solid blockages, such as concrete builders waste, can also be removed from plastic sewer pipes by jetting at 120 bar due to the non porous smooth bore which does not allow such material to adhere to the pipe wall. Similar blockages cannot always be removed from traditional sewer pipe materials without using very high jetting pressures which risk damaging the pipe wall.
Want to know more?
Go to the Civils section of the TEPPFA website where you can access the Guidance document on Jetting of Sewer Pipes.
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