A surface water drainage or culvert pipe is available in diameters from 100mm up to 3500mm. It is used extensively on large commercial surface water drainage projects such as highway schemes or extensively within agriculture; farmyard & gateway drainage systems.
They are manufactured using 100% recycled high density polyethylene, and extruded by a twin extrusion process. This is when two layers are simultaneously extruded, giving the pipe a corrugated outer wall and smooth inner wall. It is highly durable and can be buried between 0.5 & 10 metres deep.