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

https://www.protopage.com/freadhkbfu#Bookmarks

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