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

https://www.livebinders.com/b/3712486?tabid=da3dffd1-4571-182d-5358-f1da277c7869

For hydro-jetting, separate the line, install a backflow preventer, begin with lower PSI, then increase as required, using appropriate nozzles to scour biofilm, roots, and scale without damaging pipelines.