Major advantages:

Silent operation
Compatible with other drainage products
Sockets with rubber sealing rings allow for thermal expansions & contractions of pipeline.
The jointing and installation procedures are similar to regular UPVC Sewage (SWR) piping system
The basic polymer used in pipes & fittings is PVC, which is self-extinguishing material and hence does not support fire.
Rubber sealing rings ensure firm insertion joints, zero leakage and prevent noise transmission.
Long life.