Optimize your wastewater and stormwater management with the Set of 8 Filtration Tunnels (300 L each) , the ultimate solution for sustainable drainage systems for septic tanks and wastewater treatment plants. Designed to offer superior infiltration capacity, this modular system is a significant advantage over traditional gravel trenches, guaranteeing greater durability, exceptional hydraulic performance, and a remarkably simpler and cleaner installation on any type of residential or commercial land.

This complete kit includes everything needed for professional and efficient assembly. The eight heavy-duty tunnels offer a massive storage capacity of 300 liters each, allowing for the quick and safe absorption of large volumes of water. The set also includes the corresponding end caps and essential geotextile mesh, which acts as a vital protective filter to prevent soil particles from settling inside the system, thus ensuring a long lifespan without the need for costly maintenance.

Thanks to their intelligent design, infiltration tunnels allow for modular, in-line assembly that adapts perfectly to the available surface area of your plot. Their structure withstands heavy loads from light vehicular traffic once correctly installed at the recommended depth, providing unparalleled versatility compared to other options on the market. Choose efficiency, environmental responsibility, and time savings on construction with this advanced drainage system.

Main Features

• Complete set consisting of 8 high-capacity filtration tunnels.


• Capacity of 300 liters per drainage tunnel module.


• Includes closure covers and high-quality protective geotextile mesh.


• Modular system that is expandable and adaptable to different spaces and infiltration needs.


• Ideal for complementing septic tanks, wastewater treatment plants and rainwater drainage systems.


• Lightweight structure that is easy to handle, drastically reducing installation time and effort.


• High mechanical strength suitable for withstanding ground pressure and moderate surface loads.


• An ecological and sustainable solution that efficiently replaces traditional trench gravel.


• Product reference: GA92400.

Frequently Asked Questions

What exactly does the GA92400 8-Tunnel Filtration Set include?

The kit includes 8 infiltration tunnel modules of 300 liters each, the necessary end caps, and the rolls of geotextile mesh required to wrap the system and prevent the entry of sediment from the ground.

Is it difficult to install compared to traditional gravel systems?

No, the installation is considerably faster and simpler. Because the modules are lightweight, the need for heavy machinery is reduced, and the cumbersome transport and placement of tons of gravel is eliminated, optimizing both time and labor costs.

Can it be installed in areas where vehicles travel?

Yes, these drainage tunnels have a robust structure that, respecting the installation depth and the appropriate technical guidelines for ground cover, allows them to withstand the occasional passage of light vehicles without suffering damage.

What is the function of the geotextile mesh included in the set?

The geotextile mesh acts as a permeable filter barrier that allows water to pass through to the surrounding ground but prevents soil and fine sediments from penetrating inside the tunnels, guaranteeing maximum infiltration capacity in the long term.