INTEWA DRAINMAX- Tunnel Video

The DRAINMAX-Tunnel System consits of lightweight, plastic, semi-circular shells with the capacity to buffer and infiltrate rainwater from sealed surfaces into the ground . The semicircular shells have a 100% buffering capacity and 3 times as much storage volume than a conventional gravel ditch. Rainwater can pass freely through the bottom and infiltrate the groung through holes in the side of the tunnel. In the standard version with the right cover the tunnels can cope with a truck load and they have the durability to last for decades. With only three different components (tunnel, start and end sections) it is even possible to construct a large system with minimum installation cost. Moreover the system can be easily stacked, so transport costs are minimal.
www.intewa.com