Hydro launches First Defense
Published: 08 October, 2013
Hydro International’s First Defense vortex separator is now available for the first time in the UK, in response to the growing need for economical surface water treatment on new developments, car parks and highways.
Already well-established and proven in the US, First Defense uses a gentle vortex action to remove coarse particles, litter and oil from surface water runoff – a requirement which will become increasingly important in the future as a result of growing regulation for Sustainable Drainage Systems (SuDS).
The First Defense has been launched as part of the Hydro StormTrain Series of surface water treatment devices, a comprehensive toolbox for silt, sediment and pollutant removal as part of SuDS.
“By introducing First Defense, Hydro is adding a well-established, proven technology to its UK range of surface water treatment devices, creating the broadest choice of proprietary treatment products available,” said Alex Stephenson, director of Hydro International’s UK stormwater division.
Delivered as a pre-cast, standard-size concrete manhole with internal components pre-fitted, First Defense delivers pollution control for small- to medium-size catchments with easy installation and minimal maintenance.
The internal components of First Defense are designed to create a low-energy rotational flow within the chamber, allowing sediments to settle to the sump, while oils, floating litter and debris rise to the upper containment area. Harmful pollutants are therefore captured safely within the device, protecting public areas.
The gentle action of low-energy vortex separation eliminates excessive agitation of captured pollutants, ensuring they are not resuspended during peak flows. During peak rainfall events, the integral bypass also ensures pollutants remain within the chamber and are not washed out.
The orientation of the outlet can be adapted to suit site conditions. Single and multiple inlet pipes are also available, along with an inlet surface grate for maximum design flexibility.
“Deciding on the correct SuDS-compliant treatment solution can be difficult,” added Mr Stephenson. “Hydro StormTrain Series offers a comprehensive range of options and the devices, including First Defense, that can be used individually or in combination to achieve an effective SuDS management train.”