Rainwater harvesting with multiple barrels (http://www.kidsfromkanata.org/~kfk/files/rainbarrels.html)
I'm dependent on water and I'm hooked on barrels. With one installed, I just had to have more. I added another, and another. Now I have seven connected barrels. This system of barrels, pipes and fittings has a water holding capacity of 350 gallons. The potential capacity is limited only by space available. The system supplies all of our outdoor watering needs in the summer, spring and fall, and also feeds a solar shower which is regularly used once the weather warms up. This is a good system for anyone who wants to optimize save and use rainwater, but doesn't have the resources or inclination to install a cistern and pump.
The first barrel