Hydro jetting, when performed correctly by trained professionals, is unlikely to break a sewer line. The high-pressure water stream used in hydro jetting is intended to clear blockages and debris, not to damage pipes. However, in cases where the sewer line is already weakened, extremely old, or compromised due to structural issues, there is a slight risk of further damage. To mitigate this risk, it’s essential to have a professional assess the sewer line’s condition before hydro jetting, ensuring that it is a suitable and safe option for clearing blockages.