How the Drain Warden works
The Drain Warden is made from fabric. The polypropylene nonwoven geotextile fabric is the filter medium – any particulate greater than 90 microns will be trapped by the fabric. An absorbent polypropylene absorbent mini boom in the basin of the drain warden traps hydrocarbons, oils and fuels.
Runoff water entering the drain will tend to ‘swirl’ inside the drain warden, with hydrocarbons attracted to the hydrophobic boom suspended beneath the grate. Particulates greater than the pore size of the fabric will be captured. The Drain Warden also has overflow pockets to facilitate large volume flows during heavy rain.
The Drain Warden is ideal for use where leaf litter, rubbish, coarse sediment, surface oil and grease can be carried into the stormwater drains:
- car parks
- delivery docks
- service areas
- industrial plants