Infiltration Tunnel System

A high-performance subsurface drainage system designed to safely disperse clarified effluent from a septic tank into the surrounding soil. It replaces traditional gravel soakaways with a more efficient, engineered solution.

• Product reference: Infiltration Tunnel

System features

• Modular tunnel sections for flexible layout
• Engineered sidewall and base openings for uniform dispersion
• Compatible with a variety of soil conditions (subject to percolation testing)
• Designed for underground installation

Key benefits

• High storage capacity – designed to hold and disperse large volumes efficiently
• Superior infiltration – maximises soil contact for effective absorption
• Lightweight and easy installation – faster setup than stone systems
• Durable construction – resistant to corrosion and soil loads
• Space-saving design – smaller footprint than traditional soakaways
• Environmentally friendly – promotes natural groundwater recharge

Ideal applications

• Residential septic systems
• Commercial developments
• Rural and off-grid properties
• Stormwater and greywater management

Typical installation

• Install in a prepared trench with a level base
• Place infiltration tunnel sections in the trench
• Surround with permeable backfill or geotextile wrap (if required)
• Connect directly to the septic tank outlet via distribution piping

Important considerations

• Soil percolation rates must be suitable
• Proper sizing ensures long-term performance
• Regular septic tank maintenance is essential
• Installation should comply with local regulations

View the product flyer / spec sheet