Duke’s Razorooter^® II is a diquat-based herbicide registered by the EPA for controlling roots in sewer lines.

How does the Duke’s Root Control system work?

Duke’s Root Control utilizes a chemical-laden, thick foam called Razorooter® II that has the consistency of heavy shaving cream. Since effectively killing roots in sewer systems requires access to the entire line, the Duke’s crew inserts a hose from manhole to manhole. The hose releases and sprays the foam in all directions, allowing it to adhere to roots and penetrate through wye connections to kill roots even in lateral lines. The entire system is treated as the foam compresses against pipe surfaces and penetrates cracks, joints and connecting sewers. Roots are killed on contact inside and outside the pipe walls, decay naturally and slough away, with regrowth delayed for two to three years. Trees and other above ground vegetation are not harmed, and disruption to residents and businesses is minimal.