Established in 1974, Mr. Rooter Corporation is one of the largest franchised plumbing and drain cleaning franchises in the world. Located in Brighton, Mich., it has more than 300 franchise locations in the United States, Canada and Europe. The company offers a range of services in residential and commercial plumbing and drain cleaning. Mr. Rooter Corporation services faucets, sewer lines, toilets, gas vents and drain pipes. It offers products of various brands, such as Bio choice and Hydro Scrub.