What is "roto-rooter"

Roto-Rooter Plumbing & Drain Service provides plumbing repair, sewer & drain and water cleanup services to residential and commercial customers. Roto-Rooter is a United States company founded in 1935 which originally specialized in clearing tree roots and other obstructions from sewer lines. Today it employs thousands of plumbers, water restoration and sewer and drain service technicians throughout the U.S. and Canada, and offers home and business services using its patented, proprietary Roto-Rooter machine.