All household drains flow into the main sewer line. This pipe, the largest in the drain system, runs underground from the house where it connects to either the city sewer or your septic tank. Your main line can become clogged from the waste and debris flowing from any other drain in the house. It can also back up because of root penetration and/or breaks in the pipe itself. ProDrain technicians are trained to diagnose and clear these drains and have the know-how to recommend further actions if necessary.