(New Logo) Filtration Boxes All of our Biochar (Pure Rain™) Stormwater Filtration Systems can be sized for downspout treatment, available in DIY and works with all our Filter Medias. Some are large enough for pump station. Click for More Photo Galleries Old Logo and brand name, replaced with the new Logo Treatment Solutions Downspouts Pumping Stations End of Pipe Treatment Trains Stormwater Filter Medias Biochar Treatment Filters To Order or For More Information Search for: