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Downspout Filtration  
CleanWay | Downspout Filtration
To control and capture pollutants from buildings with metal roofs, downspout filters provide an efficient and cost effective solution. Along with metal roofs, many buildings have rooftop equipment that could contribute to metals and oils runoff where downspout filtration is the answer.

If you’re looking for an unobtrusive stormwater filtration system with a small footprint, consider the CleanWay® downspout filter unit. Along with an attractive and compact design, these systems are easy to install with a sampling port for taking samples and performing maintenance is a breeze.

Available in standard or custom configurations, downspout filters can be connected on the right or left side, depending on your site.

Select from a variety of tested, highly specialized media combinations to capture pollutants of concern. We work with you to identify the right media blend to help meet your specific water quality objectives.

How they work

CleanWay's downspout filter system consists of three components: primary rigid strainer, absorption media section and downspout system housing.
  1. A 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. The absorption media section incorporates a flexible open mesh fabric envelope with a specialized media blend. This envelope is 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. The outer downspout filter housing is made of durable 10ga powder-coated steel and is 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 with a Vactor truck (like our catch basin filters). There are two levels of outlet openings so the downspout filter can 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 commonly referred to as a roof drain filter, gutter drain filter or rainwater filter, 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); and dissolved copper and lead (which tend to be carried from neighboring properties or nearby roadways where copper is found in brake linings and lead is found in tire weights).

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  • High efficiency in a small footprint
  • Attractive, compact design
  • Connected on left or right side
  • Cost effective, simple solution for effectively capturing pollutants prevalent on structures with metal roofs
  • Easy access sample port to check performance
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