We manufacture eco-friendly rain diverter kits & rain barrel systems, designed for 2x3" and 3x4" gutter downspouts. The RainReserve System is very effective in that it allows leaves & debris to fall straight through the downspout and allows overflow rain water to go back out the downspout when your rain barrel is full. This is a Closed System that prevents critters & mosquitoes from entering your rain barrel/tank. In addition, the RainReserve lets you connect multiple barrels to one downspout with flexible placement (eg. around the corner).