The First Defense® vortex separator is a simple, robust device for removing sediment, floatables and associated pollutants from stormwater.
Pollutants are retained in the device; the advanced design prevents re-suspension and wash-out during high flows. The First Defense® can remove over 95% of total suspended solids at the design treatment flowrate.
The First Defense® system is as easy and quick to install as a standard precast stormwater pit. The unit is delivered to site completely fabricated, ready to be installed into an excavated hole and connected to the stormwater.
The optional grated inlet and/ or up to two pipe inlets gives the First Defense® great flexibility for being installed at source (close to the pollution generation) and these are typically small catchments and mostly hardstand areas such as cark parks.