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 lorry-bearing which offers versatile possibilities

The infiltration tunnel can be loaded permanently up to 59kN/sqm and thus is also suitable for lorry-bearing

5 years warranty