Fully perforated Twinwall drainage pipe x 3m ridged length is manufactured using 100% recycled high density polyethylene, and extruded by a twin extrusion process in which 2 layers are simultaneously extruded, giving the pipe a corrugated outer wall and smooth inner wall. Extremely durable, can be buried between 0.5m _ 10m deep. 4 perforations per dwell, 32 dwells per metre, slot length 20 - 40mm, slot width 2 - 2.5mm.

300mm Internal Diameter, 355mm Outside Diameter.