The PP house connection chambers are BENOR-certified in accordance with NBN EN 13598-1. These house connection chambers are available in diameters 250/315 and 400, composed of an injection-moulded chamber body and equipped with a profiled base. The colours are grey for RWA (rainwater drainage) and reddish brown for DWA (wastewater drainage). The flow direction is indicated on the chamber. The chambers have a weighted base. The connections are fitted with fixed lip seals. The chamber body is equipped at the top with a riser collar with lip seal for watertight connection of PVC or PP riser pipes.