Two main trenchless methods exist, and which one fits your situation depends on the condition of your existing pipe. Pipe lining is appropriate for minor repairs, whereas pipe bursting replaces an entire underground sewer line. CIPP lining typically lasts 40 to 50 years and is suitable for pipes that are cracked, corroded, or infiltrated by roots but remain structurally intact enough to support the liner.
Pipe bursting works best when the existing pipe has deteriorated to the point where lining it would be unreliable, and a full replacement provides a longer-lasting result. One important qualifier: trenchless repair of any kind requires your existing sewer line to be accessible and not fully collapsed. A pipe that has caved in cannot accept a liner or a bursting head. The sewer camera inspection shows the condition before any repair is planned.