Pipe milling is a process used to remove excess material from inside sewer pipes using a specific machine designed for this purpose. The machine used in pipe milling is typically equipped with cutting blades that can cut through accumulated debris and waste materials without damaging the interior surface of the pipe.

The process of pipe milling is typically used in sewer pipes that have become clogged or obstructed by built-up waste, roots, or other debris. The milling machine is inserted into the pipe, and the cutting blades are activated, removing the excess material and creating a smooth, unobstructed interior surface.

One of the key advantages of pipe milling is that it can be used on a wide range of pipe materials, including PVC, concrete, and clay. Additionally, the process is much less invasive than traditional sewer repair methods, as it does not require digging or excavation.