Downspout Filter


The Downspout Filter is the industry’s leading solution for treatment of roof runoff. It is used to treat commercial and industrial rooftops along with high-rise buildings, parking structures, and residential buildings. Available in 3 sizes, this filter can easily adapt to downspouts 2” to 12” in diameter. The filter comes standard with rubber boots that allow for easy installation to the downspout. Approved by the International Association of Plumbing and Mechanical Officials (IAPMO), this filter can meet all your roof runoff needs.


  • 1 Year Warranty
  • No Nets or Geofabrics
  • Sleek Inline Design
  • High Treatment Flow Rate
  • High Bypass Flow Rate
  • Low Cost


The Downspout Filter comes pre-assembled and will adapt to 4, 6, 8, 10, or 12 inch downspouts. The sleek inline design allows the filter to be used in tight spaces and it can easily adapt to square or rectangular downspouts. Technology and versatility are used to treat commercial, industrial roof tops, high-rises, parking, and residential structures.

System Operation

When flow enters the Downspout Filter housing, it is directed outside of the Mesh Stainless Steel Filter Cartridge & Filter Screen – Where trash and debris, sediments, Total Suspended Solids (TSS), nutrients, metals, oils, and grease are captured and/or treated.

Water Flow Path – Exterior View

Water Flow Path – Internal View


Removal of Total Suspended Solids (TSS)
Removal of Hydrocarbons

Maintenance & Installation

  • Minimal Media Makes Maintenance very Cost-effective.
  • Standard Hardware Means Easy Disassembly and Parts Management.
  • Universal Design Allows the Downspout Filter to be Installed in Easy-to-access Areas.
  • Every System is Built with Sturdy Handles for Convenient Control.
  • Downspout Filter comes Pre-assembled
  • Adapts to 4″, 6″, 8″, 10″ or 12″ Downspouts
  • By Design, the Filter can be Installed in an Accessible Location.