Downstream Defender 

The Downstream Defender® is an advanced hydrodynamic vortex separator that provides impressive and reliable removals of fine and coarse particles, hydrocarbons and floatable debris from stormwater runoff, delivering high levels of treatment over a wide range of flow rates.  

The Downstream Defender® is one of the Hydro StormTrain® Series of stormwater treatment systems which can be used independently or as part of a surface water treatment train. 

Available in a range of sizes, it can function as either pre-treatment or as a standalone device.  The Downstream Defender® has large storage volumes for pollutants captured from stormwater runoff whilst also offering protection to watercourses from accidental spills of oil/light liquids. 

The Downstream Defender® has been independently tested, verified and approved. 

 Targeted Pollutants: 

  • Fine particles 
  • Floatable debris 
  • Liquid and sediment bound hydrocarbons 
  • Sediment bound heavy metals 
  • Sediment bound nutrients 


The Downstream Defender® reliably treats runoff from any impermeable surfaces including highways, car parks and industrial areas: 

  •  As part of Sustainable Drainage Systems (SuDS), Water Sensitive Urban Design (WSUD), LID or LEED systems. 
  • Areas where high solids and trash/litter capture are a must. 
  • Control of silting upstream of wetlands, ponds and basins 

Contact Us

Please don't hesitate to contact us

Resolute Engineering Group
Dublin, Ireland

M-F: 8am-5pm, S-S: Closed

Get a Quote