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

https://wool-wiki.win/index.php/The_Property_owner%27s_Guide_to_Budget_Sewage-disposal_Tank_Emptying_and_Upkeep

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