The Vortechs™ system is a high-performance gross pollutant trap that effectively removes fine sediment, oil and grease and floating and sinking debris. Its swirl concentrator and flow controls work together to minimise turbulence and provide stable storage of captured pollutants.

The design also allows for easy inspection and unobstructed maintenance access. With comprehensive lab and field testing, the system delivers proven results and site-specific solutions.

Pre-cast models can treat peak design flows up to 700 L/s; cast-in-place models handle even greater flows. A typical system is sized to provide an 80% load reduction based on field and laboratory-verified removal efficiencies for varying particle size distributions such as 50-micron sediment particles.

The Vortechs system’s swirl concentrator and flow controls work together to create a low energy environment, ideal for capturing and storing fine particles and other pollutants of concern. 




  • Largest treatment zone surface area of any hydro-dynamic system available
  • Easy maintenance - unobstructed access to stored pollutants
  • Proven performance verified through third-party testing
  • Shallow system profile and unique horizontal design makes installation easier and cost-effective
  • Flexible design fits site constraints and accommodates a wide range of treatment options
  • 80 per cent removal of particles over 100 micron
Lyttelton Port – Log Yard
Case Study

Lyttelton Port – Log Yard

This project involved a 1.5Ha redevelopment of an existing log yard to provide a better all-weather surface and...

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