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Downspout Filtration  
CleanWay | Downspout Filtration
For effective capture of metals, oils and pollutants from rooftop runoff, CleanWay® Downspout Filtration devices provide an efficient and cost effective solution. CleanWay Downspout filters help you comply with water quality regulations that mandate control of runoff from metal roofs and rooftop equipment.

CleanWay stormwater filter systems feature an attractive and compact design that captures pollutants at the source. Available in standard or custom configurations, downspout filters can be connected on the right or left side, depending on your site. They are easy to install and maintain and feature a ready access sampling port. To capture pollutants of concern, we work with you to identify the right media blend from our tested, specialized media combinations.

How they work

CleanWay Downspout Filtration systems consist of three components:
  1. Primary rigid strainer constructed of a perforated material with surface area that accommodates flows rated at 125% of the flow of the downspout prior to installation.

  2. Absorption media section incorporates a flexible open mesh fabric envelope with a specialized media blend suspended from the support assembly and fitted into the basin so all influent passes through before exiting and entering the downstream conduit. The combination of gross solids removal via the strainer and the absorption / filtration in the media section reduce TSS and other pollutants.

  3. Outer downspout filter housing made of durable 10ga powder-coated steel and designed to provide easy access to the internal rigid strainer and filter elements via the top lid. The lid has a prop that can be locked in an open position so a single operator can service the unit by hand or Vactor truck. Two levels of outlet openings allow the unit to be run in either a dry (where vector control is a concern) or wet configuration (to increase removal rates with additional contact time).

Downspout filters, also referred to as roof drain filters, gutter drain filters or rainwater filters, address the primary concerns of dissolved zinc which can come from galvanized HVAC equipment on the roof, moss inhibitors and abrasion resistance coatings, along with environmental deposition of dissolved copper and lead from neighboring properties or nearby roadways where copper is found in brake linings and lead is found in tire weights.

Top of Page
  • High efficiency in a small footprint
  • Attractive, compact design
  • Connected on left or right side
  • Cost effective solution for capturing rooftop runoff
  • Easy access sample port
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