Hydro jetting is generally safe for septic systems if it's done correctly. This method uses high-pressure water to clean out clogs and debris from the pipes, and it's effective for removing blockages and buildup. However, it's important to keep in mind that excessive or improper use of hydro jetting can damage your septic system. If the pressure is too high, it can cause the pipes or the septic tank to crack or break, leading to expensive repairs.
It's crucial to hire a licensed and experienced plumbing professional who understands how to use hydro jetting equipment correctly and safely. The plumber should also conduct a thorough inspection of your septic system before performing hydro jetting to ensure that there are no pre-existing damages or issues that could be exacerbated by the high-pressure water.