The universal backwater valve
The universal backwater valve for chamber bases of various producers and for concrete wells
- Just as all the other Kramat backwater valves, they effectively protect buildings from the backflow of sewage and rain water.
- It has been designed to be installed in pre-existing systems without the need for modifications.
- Its design allows for easy installation inside most of the chamber bases, sewage and rain water wells available on the market as well as on the ends of sewage and rain water pipes emptying into concrete wells.

Universal backwater valve for concrete wells
A device which can be installed in pre-existing concrete wells.
- Installed in the outlet of a sewage pipe in pre-existing concrete wells.
- For use in wells with or without manhole openings.
- Mobile unit can be removed above ground with the help of the aluminum rod and handle without entering the well.
- When there is a reverse flow, it is stopped by the flap which securely seals to the head of the backwater valve.
- Possibility of installation on the cemented outlet of a storm water pipe emptying into rivers or reservoirs.
- Chromium-nickel protective guard securing the flap and gasket against rodents which also prevents them from entering the building.
The Universal Ø110 Backwater Valve for concrete wells (with removable flap) UZBBW110 (140cm rod and handle included in the set)
Mobile unit can be removed above ground with the help of the rod and handle without entering the well.
A special, and pattented by Karmat, finned seal allows for a perfect seal of the valve to the inner wall of the Ø110 pipe
The universal backwater valve for chamber bases of various producers
A device which can be installed in pre-existing chamber bases made of plastic. Effectively secure buildings against flooding caused by backflow of storm water and sewage.
- Possibility of removal of the mobile unit above ground without the need of entering the well.
- Possibility of extending the rod to several meters.
- Chromium-nickel protective guard securing the flap and gasket against rodents which also prevents them from entering the building.
- Low cost and simple installation.
The Universal Ø110 Backwater Valve for wells made of plastics (with removable flap) UZBKW110 (140cm rod and handle included in the set)
The Universal Ø110 Backwater Valve for wells made of plastics (with removable flap)
UZBKW110
Weight: 1,51 kg
The Universal Ø160 Backwater Valve for wells made of plastics (with removable flap)
UZBKW160