Pass-through unit 400x200 with backwater valve for a rising pipe DN 400mm smooth solid pipe inlet of a smooth pipe DN 200mm K40P20ZB

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