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

https://hectorwaul457.huicopper.com/selecting-a-specialist-for-septic-tank-pumping-and-cleansing-on-a-budget-plan

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