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

https://oscar-wiki.win/index.php/Dependable_Septic_System_Emptying:_What_to_Expect_from_Expert_Teams

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