Sewer and drain cleaning. Found sewer line backup between the clean-out in the basement and the septic tank. Determined that the line suffered from significant scaling and possibly a break or separation approximately 2 to 3 feet from the clean-out. The affected section consists of a 5 to 6-foot run of 4-inch cast iron pipe extending from the inside of the foundation wall to the septic tank. Successfully cleared the line from the septic tank towards the house. Following this, an examination of the pipe revealed that it requires replacement. The existing line is situated 3 to 4 feet deep and measures 5 to 6 feet in length. Advised the customer that someone will reach out to schedule.