For hydro-jetting, isolate the line, install a backflow preventer, begin with lower PSI, then increase as required

https://wakelet.com/wake/1mpZyP7dwuUFiJSx58Iv0

For hydro-jetting, isolate the line, install a backflow preventer, start with lower PSI, then increase as needed, using proper nozzles to search biofilm, roots, and scale without hurting pipelines.