Silent-db20 acoustic drainage has improved acoustic properties, is compatible with the existing Geberit HDPE drainage system. Time saving installation techniques due to the many different connection possibilities. Has a simplified fastening technique for use in commercial drainage systems. With ribbed design of fittings which improves sound dampening. Bracketing system optimised for insulation of structure-borne sounds. The diameters are from 56mm to 160mm. Has all the other benefits of HDPE.