roto rooter
Roto-Rooter is a United States company founded in 1935 which originally specialized in clearing tree roots and other obstructions from sewer lines. As of 2019, it employs thousands of plumbers and service technicians throughout the U.S. and Canada. In 2020, Roto-Rooter Services Corporation of Bristol, PA purchased the Prospan Air Shoring to provide trench protection for their technicians.