Placed under one of your downspouts, rain barrels conveniently collect rainwater that you can use to water gardens and lawns, wash cars or even fill birdbaths and ponds. A 1000 square foot roof yields about 600 gallons per inch of rainfall, so that’s a lot of water (and money) to be saved. Registration includes the barrel and kit to connect it to your gutter downspout. All necessary tools and equipment will be provided.