Every time it rains, hundreds of gallons of water run off your roof, down the gutters, and straight into the storm drain. A rain barrel captures some of that water and stores it for your garden, giving you a free supply for dry stretches and easing the runoff that overloads storm systems. Setup is a simple weekend project.
How It Works
A rain barrel sits under a downspout and collects the water that drains off your roof. A single barrel typically holds 50 to 80 gallons, and even a light rain can fill it, since a roof sheds a lot of water. A spigot near the bottom lets you fill a watering can or attach a hose for the garden.
Setting One Up
- Place it on a sturdy, raised base like cinder blocks, so gravity gives you usable pressure at the spigot.
- Cut the downspout to direct water into the barrel, using a diverter kit so overflow still drains away from your foundation.
- Cover the top with a screen to keep out leaves, debris, and mosquitoes.
Using the Water Wisely
Rainwater is great for gardens, lawns, potted plants, and washing outdoor gear. Plants often prefer it to treated tap water. Use it within a week or two during warm weather so it stays fresh, and connect a soaker hose to water beds slowly and efficiently.
A Few Cautions
Roof runoff can pick up grit and bird droppings, so do not drink rain barrel water or use it on the edible parts of vegetables without treatment. Empty or disconnect the barrel before a hard freeze so it does not crack. Check your local rules, since a few areas regulate rainwater collection, though most encourage it.
Once it is set up, a rain barrel quietly fills itself every time the sky opens, handing you free water for the garden and keeping a bit of the storm out of the drain.