Optional automatic diverters are made from upcycled vinyl fence post covers and attach directly to our rain barrels via an attachment hose. Will fit a 2x3 inch or a 3x4 inch downspout. Hose is provided. The Automatic Diverter is installed into the downspout to direct the water into the rain barrel, once the barrel is full; the rest of the rain water is diverted back into the downspout so the rain water can drain as it did previously before the rain barrel was installed. For questions on this product please call the office. Note: Can be picked up at our office.