http://www.durgan.org/URL/?XHGLB 8 April 2009 Downspout Rainwater
Pictures indicating a simple, practical method of utilizing downspout rainwater. Barrels cost 15 dollars and all parts are standard plumbing fittings. Any urban downspout system must address the overflow problem during rainfall. The large bung hole is a reasonable compromise for overflow. The height is such that a hose may be utilized for watering plants, but I usually use five gallon buckets on a two wheeled cart. The system is readily expandable by cascading more barrels in line. I have four barrels, two on each side of the house. the system is essentially closed, hence mosquitoes are not a problem.
http://www.durgan.org/URL/?ZVABL 16 April 2009 Downspout Water Connection.
Seasonal connections. The downspout water system was switched over to Summer mode by connecting the downspout to the storage barrels.