What are the steps involved in sewer main line replacement and how can it be done efficiently and cost-effectively?

The steps involved in sewer main line replacement include inspection, excavation, removal of old pipe, installation of new pipe, and backfilling. To do this efficiently and cost-effectively, it is important to plan ahead, use modern equipment, hire experienced professionals, and consider trenchless methods if possible. Proper maintenance and regular inspections can also help prevent the need for replacement in the future.