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 

Applications:   

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