Best Downspout Diverter Rainwater Harvesting & Collection, Self-Flushing, Prevents Clogs, Fits 2-5/8 x 2-5/8, 2×3, 3x3, 3×4, up to 5x5 & Round Downspouts.

Take control of your rainwater harvesting with The Best Downspout Diverter, a patented gutter diverter designed to outperform ordinary rain barrel kits. Built with durability, expandability, and clog-resistance in mind, this diverter makes it easy to collect, store, and manage rainwater for your home and garden. Unlike small-hose diverters that quickly clog or overflow, this system uses large 1.5″ hoses, multi-outlet expandability, and a self-flushing design to maximize flow. With support for up to 8 rainwater outlets, you can simultaneously direct water to multiple rain barrels, pools, gardens, or ponds—without worrying about backflow or spillage. The intelligent design prioritizes filling lower barrels first, then routes overflow to higher outlets or safely back through your downspout, protecting your foundation from water damage. Installation is simple: the diverter fits 2×3, 3×3, 3×4, and round downspouts, with included adaptors and reducer pieces for a custom fit. Once installed, it stays in place year-round thanks to UV-resistant HDPE plastic, winter-ready foam wall, and reversible waterslide. Perfect for homeowners who want a reliable rainwater collection system, this diverter is easy to clean, clog-resistant, expandable, and built to last. Backed by a 1-year replacement warranty, it’s the smart choice for anyone serious about rainwater harvesting.

• Patented Rainwater Diverter System – Designed for maximum efficiency, this downspout diverter kit captures more water faster with large 1.5″ hoses and a self-flushing design that prevents overflow and clogs. Compatible with rain barrels, water tanks, and cisterns when used with standard downspouts. Ideal for redirecting water to gardens, lawns, trees, and shrubs.
• Universal Fit for Most Downspouts - One-size-fits-all design for rectangular and round downspouts including 2.5x2.5, 2x3, 3x3, 3x4, and downspouts up to 5 inches wide. Includes adaptors, reducer pieces, and everything needed for easy DIY installation.
• Clog-Resistant & Easy Maintenance – Dual filter screens stop leaves and debris, while the wide water path reduces blockages. Removable lid makes cleaning simple without uninstalling the diverter.
• Connects to standard 1.5-inch diameter swimming pool vacuum hoses, sump pump hoses, and 3/4-inch diameter garden hose fittings for distributing rainwater to distant locations.
• Complete Kit Included – This standard kit includes (4) hollow caps with gaskets, (4) cap plugs, (2) 1.5" outlets and outlet filter screens, (2) 1.5" flexible and expandable 30" diverter hoses, (2) UV hose protection sleeves, (1) reversible waterslide, (1) waterslide filter screen, (1) foam winter wall, (4) metal screws, (3) downspout reducers, (3) lid sections A, B, and C.
• Durable & Winter-Ready - Designed to remain installed during winter, where temperatures fall below freezing. A foam winter wall and reversible waterslide create an interior pathway for rainwater or snow melt to pass directly from the upper downspout to the lower downspout without entering the diverter well.
• Includes step-by-step, printed installation instructions (English, French, Chinese), accompanied by pictorial images and a link to an installation video.
• Available in white only, however, the purchaser can apply spray paint for plastics to change the color.
• Year-Round Durability and warranty– Made from heavy-duty UV-resistant HDPE plastic with a winter cap and reversible waterslide for snow and ice. Installs once and stays in place all seasons—no need to remove.
• One-year product replacement warranty with proof of purchase. However, some of our customers have been using our diverter for over ten years!