The RainReserve system lets you tap into your gutter’s downspout and store rain water for later use in any barrel, tank or storage system you choose. Not only is rain water great for watering gardens and washing cars, using it helps you cut down on your water bills. This complete system includes a downspout attachment to filters contaminants from the rain and hose attachments to make using the rain water easy to use. U.S.A.