The 300-liter infiltration tunnel is the ultimate, highly efficient solution for sustainable stormwater management and wastewater treatment. Designed specifically for self-contained sanitation systems such as septic tanks and treatment plants, this modular system stands out for its large storage capacity and ease of installation in residential, commercial, and industrial projects.

Maximum strength and versatility for drainage and sanitation

This underground drainage system is manufactured with top-quality plastic materials that guarantee exceptional durability against corrosion and ground pressure. With optimized dimensions of 1.16 x 0.8 x 0.51 meters, the infiltration tunnel can withstand vehicle traffic, allowing the surface above to be used for parking areas or walkways without compromising the integrity of the infiltration structure.

Its alveolar design allows for much faster and cleaner water infiltration into the ground than traditional gravel systems, drastically reducing the amount of excavation material needed and simplifying transport and assembly on site.

Main features of the 300 L Filtration Tunnel

• Product reference: G230010


• Storage capacity: 300 liters per module, maximizing retention and infiltration volume.


• Compact dimensions: 1.16 meters long, 0.8 meters wide and 0.51 meters high.


• Suitable for vehicle traffic: Designed to withstand rolling loads under appropriate installation conditions.


• High infiltration capacity: Surface optimized for the gradual release of water into the surrounding soil.


• Modular and expandable: Allows connecting several tunnels in line or parallel to adapt to the exact needs of any purification or drainage project.


• Sustainability: An ecological and efficient alternative to traditional drainage ditch systems with stone.

Frequently Asked Questions about the Infiltration Tunnel

What type of facilities is this filtration tunnel recommended for?

It is primarily designed to act as an infiltration field at the outlet of septic tanks and wastewater treatment plants, as well as for rainwater collection, retention and infiltration systems in plots and urbanizations.

Is it really suitable for vehicles to drive over?

Yes, the tunnel structure can support road traffic loads as long as it is installed correctly, respecting the minimum cover depth and compaction layers specified in the manufacturer's technical guidelines.

How do multiple modules connect to each other?

The modules are fully modular and easily connect to each other lengthwise. They also include end plates for connecting water inlet and outlet pipes.

What advantages does it offer compared to a traditional gravel trench?

It offers a much higher storage volume (up to three times more than traditional gravel), significantly reduces the volume of soil to be excavated, speeds up installation times and prevents premature saturation of the ground.