An industry solution for roof runoff, the Downspout Filter by Bio Clean Environmental treats commercial and industrial rooftops of high-rise buildings, parking structures and residential buildings. Available in 3 sizes, this filter can easily adapt to downspouts 2 in. to 12 in. in diameter. The sleek inline design allows the filter to be used in tight spaces and is available in select colors. Used to meet NPDES Phase II stormwater requirements and approved by the IAPMO, this filter can meet all your needs.