Our DIBt®-approved DRAINMAX tunnel elements are highly resilient, 1.6 m³ capacity, large-volume, lightweight plastic shells that create a hollow space in the ground. The DRAINMAX® tunnel elements have an open bottom and holes in the side walls. Together with the backfill material, they create an underground water storage volume.

One system - many applications
Whether storage, infiltration, retention, fire water storage, or subsurface irrigation – the DRAINMAX Tunnel covers a wide range of technical requirements with just one system. The system can be flexibly adapted to individual circumstances and impresses with its simple installation and high storage capacity.

DRAINMAX Tunnel - The centrepiece of our efficient system
The DRAINMAX tunnel is the core product of our system solutions. State-of-the-art injection moulding technology ensures a precise fit, integrated connection options and additional savings potential. DRAINMAX tunnels are also protected by several patents and are DIBt-certified. This means that our DRAINMAX tunnel fulfils the highest requirements in terms of quality, safety and load-bearing capacity.





















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