Prevents the escape of odours from the sewer system. Protects the structure from corrosion by aggressive gases. Rainwater can flow into the sewer system in a controlled manner via a self-opening ball valve.
For the safe movement of iron and steel covers. The cover lifters are aids that simplify the opening, closing and moving of manhole covers. Effort and risk of accidents are considerably reduced.
Effective protection against flooding, foreign bodies and unpleasant odours. Application area for back flow protection of sewer systems and rainwater pipes or for the prevention of odour formation in mixed sewers.