By using a 55 gallon barrel and $10 worth of additional parts, you can construct a sustainable rainwater collection system, providing you with free water. All you need is a barrel, garden hose valve, garden hose washer and a Male Hose Thread to Female Pipe Thread 3/4" adapter. Cut a 10" opening on the top of the barrel using a saw and drill 1" hole near the bottom of the barrel; the adapter and the washer go on the inside of the hole while the valve goes on the outside. A piece of window screen is attached to the top opening to filter out the debris and create a cover from mosquitoes. Lastly, redirect the downspout so rainwater goes directly into the barrel. You can also attach secondary barrels to double or triple the water collection. One 55 gallon barrel can fill up in about 10 minutes during heavy rain.
Instructables - Make, How To, and DIY. "Need Free Water? Build a Rain Barrel." http://www.instructables.com/id/Need-Free-Water%3f--Build-a-Rain-Barrel/ (4 December 2010).
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