Percolation tunnel
GRAF
* The Graf Infiltration Tunnel has been mainly designed for the use in private and rural areas
* The system which consists of one or several tunnel modules and two end plates can be extended at will
* The laying is realized in one or more lines of the same level
* As the weight of one module is only 11 kilos, the handling of the Infiltration Tunnel is excellent
* The surface beyond the tunnels is vehicle loading which offers versatile possibilities
* The infiltration tunnels can be loaded permanently up to 3.5 tons/sqm and thus is also suitable for vehicle loading
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