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

https://escatter11.fullerton.edu/nfs/show_user.php?userid=9786140

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