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

https://direct-wiki.win/index.php/Septic_System_Pumping_as_well_as_Upkeep:_A_Homeowner%27s_Step-by-Step_Resource

For hydro-jetting, separate the line, install a backflow preventer, start with lower PSI, then increase as required, utilizing suitable nozzles to scour biofilm, roots, and scale without hurting pipes.