KNTS Drain is a corrugated double wall pipe, the smooth inner wall and the outer corrugated manufactured in HDPE (high density polyethylene) for extrusion process. Supplied drilled or not drilled bars of 6 meters with integrated bag and seal ring (not for pierced). 

Developed to withstand the mechanical stress and the onslaught of chemicals found in liquid or captured around (underground). 
Applied to conduct large volume of liquid.

Manning coefficient equal to 0.010. With strength class SN4, is available in black color (internal / external).