rain water collector
100-Year-Old Way to Filter Rainwater in a Barrel - If you want filtered water right from a rain barrel this is for you. For gardening, rainwater is, naturally, best unfiltered, But for household use, the vintage book says the following instructions yield a cheap and easy way to make a filter just as good as a patent filter costing 10 times as much.
Homemade 220 gallon rain barrel system for under $150. Uses 1 water inlet and uses water from all barrels with 1 hose connection. This system is also easily expandable to more barrels. You begin by having level ground, and building a raised platform for the barrels. And here's what it looks like when set up. Watch the above video for easy to make instructional. And here you have a place to hook up your hose and water your garden!