Drenotube is a pre-assembled drainage pipe: the perforated pipe, a synthetic granulate that replaces gravel, and a geotextile filter sock come already combined in one ready-to-lay bundle. No need to supply loose gravel or wrap the pipe in geotextile on site. This version: Ø110 mm, SN4 stiffness, length 3 m, weight approx. 1.3 kg/m.