Pass-through unit 315x200 with a backwater valve for a DN 315mm corrugated rising pipe (external diameter of the 355mm pipe) K35P20ZB

The backwater valve is intended for use in sanitary or rainwater drainage systems. The recommended installation location is the house drain pipe between the building and the main network. The well with a wallet and a backwater valve fulfills the function of an inspection chamber, at the same time securing the building against flooding.