For over 25 years, Mainline Plumbing & Sewer Inc. has been proudly serving Macomb, Oakland and Wayne Counties. Mainline is a Full Service Plumbing, Sewer and Drain service company offering residential and commercial service. Mainline is a true 7 day / 24 hour Plumbing company. Mainline offers high tech camera inspection and Hydro Jetting services to clear the most challenging sewer blockages without the need to dig! Mainline also specializes in backflow testing and repair and Property Management services.