Rain Gutter Downspout Filter

This is a replacement filter for the Amerimax Flex Grate Downspout filter assembly (Model #4400). It may fit downspout filters from other manufacturers, please check the dimensions before printing. The filter measures 110mm x 110mm (4.3in x 4.3in) and was designed similar to the original product, using the same dimensions.

As these filters endure a range of conditions such as warmth and cold, rain, ice and direct sun, I recommend that you print this using an ASA filament and flat on the print bed.

2025-05-06: I've added a second profile which includes thicker grating to increase filtering. I found that some tree seeds were making it through the original size. If trees don't overhang your roof, you can probably use the original profile and save filament.