PolyDrain First Flush

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PolyDrain First Flush

First Flush® products are designed specifically for sites under 100 acres were specific pollutants – oils, greases, and other hydrocarbons – must be captured without impeding bypass flow particularly during the first fifteen minutes of a rainfall  or “first flush” effect

Space restricted sites: First Flush technology is perfect for sites that lack the necessary area for retention ponds and larger structures.

Stormwater Filtration

Filtration Media

FirstFlush® is the perfect solution when seeking a BMP that must handle sheet flow, control vectors, collect debris, treat bacteria, and capture hydrocarbons – all on the same site.  ABT First Flush systems utilize a variety of filtration media and fabrics.

  • Standard Filtration “Blankets”
  • Antimicrobial Filtration Media
  • Hydrocarbon Media
  • HMR – Heavy Metals Removal Media
  • Mixed Media

The 2600FF series of filtration catch basins feature a two or three-part, stackable structure that is made of polymer concrete and comes with a grated cover.  It can be used in conjunction with the PolyDrain Trench Drain or as a stand-alone unit.  The basket inserts that hold the replaceable filter have built-in overflow relief.  Units are easy to inspect and clean.  Basket and filter modules can be retrofitted to existing PolyDrain 600 Series catch basins.

First Flush





Debri Volume

(cu. ft)

Bypass Flow Area


Details Sheet

(.dwg .pdf)

(Coming Soon)
20 x 13 x 32
20 x 13 x 48