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

https://echo-wiki.win/index.php/Grease_Trap_Service_Basics:_Keeping_Food_Service_Operations_Clean_and_Code-Compliant_51781

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