Filter Flow and Filter Flow XT Gutter Filters are a polyether foam filter insert designed to prevent leaves, pine needles and large debris from entering and clogging a gutter or downspout. We carry filters that fit inside both k style gutters and half round gutters and they are unnoticeable from the ground. The filters do not penetrate the roof in any way and can handle a large amount of rainfall as the filters do not soak up any water.
Filter Flow has a proprietary coating designed to keep mosquitoes from breeding inside the gutters and to protect it against harmful UV rays from the sun.
Our standard Filter Flow gutter guard has a 5 year performance warranty and the Filter Flow XT features an industry best 25 year performance warranty.