DRAINMAX tunnels trenches can be flushed to eliminate sediment that renders other solutions ineffective.
Drainmax
Tunnel Infiltration Trench for Stormwater Management
Long term efficient infiltration and stormwater runoff reduction, for minimum space.
DRAINMAX tunnel infiltration trench is a user-friendly solution certified for long term efficient infiltration and attenuation of stormwater.
Its tunnel geometry with rigid construction of recyclable HDPE plastic ensures vehicle loading capacity up to 66 tons. DRAINMAX creates significant void space underground which makes it very space efficient to capture, infiltrate and attenuate stormwater.
The clever design of the DRAINMAX system guarantees a constant level of efficient infiltration in the long run. The walls and bottom of the DRAINMAX tunnel trench can be completely flushed periodically to eliminate the problem many other solutions have, which is sediment accumulation that renders them eventually ineffective.
Technology
The DRAINMAX Tunnel infiltration trench is produced by one of the largest and most advanced thermoforming machines in Europe. In addition to consistent quality, this also guarantees the lowest possible manufacturing costs and thereby a cheap m³ price for the entire infiltration or attenuation system. The tunnel geometry is of rigid construction made of recyclable HDPE plastic.
DRAINMAX tunnels are fast and easy to install, because of their light weight, with a storage capacity of 1.6 m³ (420 gallons) per chamber. They can be installed in minimum space, such as below parking lots, bioretention areas, or any small area. In the smallest of spaces, DRAINMAX tunnels allow seeping or draining away of surprisingly large stormwater flows. Plus, excavation depth is lower than with many other solutions.
DRAINMAX Benefits
- Constant level of efficient infiltration thanks to its easy cleaning and maintenance
- Minimum space requirement due to 100% attenuation volume compared to 35% for gravel
- Latest manufacturing techniques
- 13.2 ton and 66-ton load capacity options
- 1.6 m³ (420 gallons) large volume per center tunnel segment
- DIBt® approval
- Fast and user-friendly installation and maintenance
- RECYCLED HDPE construction for strength and affordability
- Long life and durability: manufactured to 50-year durability standards
To ensure maximum stability, DRAINMAX tunnels undergo rigorous quality control and load testing.
In addition to manufacturing tests, quality tests are on-going in long term 3rd party testing which monitor short and long-term resistance of the tunnels.
DRAINMAX Products
DRAINMAX Tunnel
Infiltration Trench
Benefits Include
- 13.2 ton and 66-ton load capacity options
- Washable floor and walls
- Easy to assemble
Product Article Numbers
- Middle Tunnel 422 gallons (1600 liters) for class SLW 60: 500150
- Middle Tunnel 422 gallons (1600 liters) for class SLW 12: 500160
- DRAINMAX Tunnel start cap with 26 gallons for class SLW 60: 500152
- DRAINMAX Tunnel end cap with 26 gallons for class SLW 60: 500151
- DRAINMAX Tunnel start cap with 26 gallons for class SLW 12: 500162
- DRAINMAX Tunnel end cap with 26 gallons for class SLW 12: 500161
DRAINMAX Accessories
Geotextile Membrane
- The Geotextile 300 GSM is especially suitable for covering the DRAINMAX tunnels: Article Number 500026
- The Geotextile 190 GSM is especially suitable as a basis underneath the DRAINMAX tunnels: Article Number 500034
DRAINMAX Accessories
Discharge Throttle
If stormwater is not permitted to flow into the public drainage system at full flow rate, the continuous INTEWA discharge throttle ensures the maximum permissible flow is released irrespective of the water level.
- 8 gallons per minute: 800030
- 26 gallons per minute: 800040
- 61 gallons per minute: 800050
- 160 gallons per minute: 800022
- 320 gallons per minute : 800023
- 475 gallons per minute: 800024
- 2860 gallons per minute: 800026
- 3970 gallons per minute: 800025
- 7300 gallons per minute: 800027
Product Article Numbers: Suitable up to
DRAINMAX Technology
Minimum Space Requirement
Compared to conventional gravel infiltration trenches with an attenuation volume of approximately 35%, DRAINMAX tunnel infiltration trenches a 100% attenuation volume.
Fast and user-friendly installation and maintenance
Each tunnel section can be easily carried by two people since it weighs only 66 lb. and has a storage capacity of 1.6 cubic meters (420 gallons). The tunnels are connected by overlapping the edges. An area of 7,000 square feet can be installed in just 8 hours and involves only three different component types.
Plastic HDPE trench with loading capacity of a truck and DIBIt® accreditation
Finished tunnels are capable to withstand heavy truck loads. The long-term load capacity for the DRAINMAX system was verified for a minimum service life of 50 years and has the DIBIt® accreditation (German Institute for Building Technology).
Constant level of Efficient infiltration for the long run
In most conventional infiltration trenches, only the drainage pipes can be cleaned. However fine dirt particles enter through the slits of the pipes and then gradually settle down to the bottom and on the walls of the trenches. In time they lose their efficiency and finally must be dug out when they lose their infiltration capacity.
The clever design of the DRAINMAX system enables easy cleaning and maintenance. The walls and bottom of the DRAINMAX tunnel infiltration trench can be completely flushed using the special connecting slots. Therefore, a constant level of efficient infiltration is guaranteed long term.
Long life durability
The long-term load capacity for the DRAINMAX system was verified for a minimum service life of 50 years. To ensure longest life, DRAINMAX tunnels should be installed with a pre-cleaning interval sedimentation and filtration shaft. This will prevent dirt particles from entering the tunnel.
Latest manufacturing techniques
The DRAINMAX tunnel infiltration trench is produced by one of the largest and most advanced thermoforming machines in Europe. In addition to consistent quality, this also guarantees the lowest possible manufacturing costs and thereby a cheap m³ price for the entire infiltration or attenuation system. The tunnel geometry is of rigid construction made of recycled HDPE plastic.