Amerimax InvisaFlow Easy Downspout Filter

AmeriMax InvisaFlow Flex-Grate filters out leaves and other debris , preventing labor intensive downspout jams. The grate diverts gutter debris , allowing water to flow through and drain correctly. The FlexGrate keeps landscape drain pipes and rain barrels free of leaves and debris.

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  • AmeriMax # 4400 InvisiFlow 18″ Flex-Grate Black PVC Downspout Filters
  • For standard downspout sizes 2″ x 3″ , 2″ x 2″ , or 3″ x 4″
  • Easy to install
  • Connects to a standard 4″ corrugated or a PVC drain pipe at bottom
  • Screw onto gutter downspouts for the best results
  • 18″ in length

Additional information

Part Number


Item Weight

0.352 ounces

Product Dimensions

13.35 x 4.92 x 4.72 inches






Amerimax is the leading manufacturer of rain-carrying systems in the United States, offering high-value solutions to consumers and professional contractors. We provide all products needed to protect your home from rainwater, including steel, aluminum, vinyl and copper rain-carrying systems, soffit, fascia, flashing and roofing accessories. We build and distribute our products through multiple facilities across the US. Amerimax is a division of OMnimax International, an international producer of aluminum, steel, vinyl, copper and fiberglass products for OEM, distributors, contractors and home centers in North America and Western Europe. Core Euramax International products include specialty coated coils, metal wall and roof systems, metal and vinyl rain-carrying systems, soffit and fascia, roofing accessories, aluminum and vinyl windows and doors, patio products, vinyl railing systems, aluminum recreational vehicle doors, windows and sidewalls, and aluminum bath and shower enclosures. Euramax International is headquartered in Norcross, Georgia.
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