The plugs are installed at the beginning and end of the series in the drain tunnel GRAF for joining pipe sections DN 100/150/200/300. Infiltration drainage tunnels are established on a country construction sites and specifically designed for the drain of the field device and serve for stormwater, and the purified waste water. Tunnels are not high weight - 11 kg and can take up to 300 liters of water for one time, are made of polypropylene. If it is necessary to equip the drainage field to the pedestrian area, it suffices to fill the tunnel ground ball to 250 mm, and for the possibility of a car arrival, the minimum soil backfill layer should be at least 500 mm. Tunnels are easily connected to each other by special connectors. Drainage tunnels can be installed in one or more rows. All products Standartpark certified according to international quality control system.
Benefits of drainage tunnels:
1. air exchange and ventilation in tunnels contributes to creating conditions for the life of aerobic bacteria that doochischayut drains. 2. Good ventilation can significantly increase the length of drainage and as a result, the increase in waste accepted. 3. Ease of installation - tunnels can easily be connected to each other, are installed at the ends of a stub. 4. Cost - minimum excavation and because not much weight (11 kg) there is no need to use special equipment. 5. High capacity - (three times higher than that of the gravel trench). 6. Easy to transport - (due to the hollow structure is placed on the pallet 42 of the tunnel). 7. Withstands vehicle weight of 3.5 t / 1m.kv.
