Rain barrels collect rainwater from a downspout for watering gardens, and they range from simple barrels with a spigot to decorative urns, collapsible barrels and large water storage tanks. The first decision is the volume you need, because one barrel fills quickly in a heavy rain, while larger gardens benefit from several linked barrels or a bigger tank.
Capacity is the next question. Among the 11 products that list capacity, most fall between 45 and 100 gallons, and 50 gallons is typical. A larger barrel holds more water between storms but takes more space and weighs a lot when full, so place it on a level, solid base.
Fittings and overflow come next. A diverter kit sends water from the downspout into the barrel and back to the drain when it is full. An overflow outlet, a screen to keep out leaves and mosquitoes, and a spigot high enough to fill a watering can all matter. Linking kits connect barrels.
Placement matters. Raise the barrel on a stand to improve water pressure, and keep it away from foundations. In freezing climates, drain and disconnect barrels in winter.
Before buying, check the capacity, the fittings included, the overflow, the screen, the stand and whether rainwater collection is allowed where you live. Rainwater is for plants, not drinking. Dark coloured barrels limit algae growth, and a lid that closes tightly keeps out children, pets and mosquitoes. Some barrels are designed to look like stone urns or wooden barrels for front gardens. A soaker hose connected to the spigot waters beds slowly using gravity, which suits barrels raised on a stand. Using rainwater on vegetables is common, but avoid wetting leaves of crops eaten raw if your roof is old or treated. Check the spigot washer each spring.
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