Description

The Controlbox is well suited for under-surface drainage constructions due to its very high mechanical strength. It serves as inspection tunnels for the VARIO-Box system and can be easily combined with one another owing to its modular design.

The VARIO-Box system allows the height to be adjusted and offers various tunnel openings from 170 to 500 mm in diameter which enables easy installation in the excavated drainage trench. Moreover, these are also used in modern trickle filter systems as an inspection shaft below the actual trickling filter fills.