Mr. RooterÂ® Corporation is one of the largest and fastest growing full service plumbing and drain cleaning companies in the world. When you need a qualified plumber, contact your local Mr. Rooter plumber. There's never an overtime charge. Our plumbers are clean and professional, and they get it fixed right the first time. There is no extra charge for nights or weekends, and you know the price before we start. Our workmanship and parts are guaranteed.