How to Set Up a DIY Rain Barrel

Every rainstorm sends gallons of free water rushing off your roof and down the drain — a rain barrel catches it instead. Rainwater harvesting is one of the simplest sustainability wins for any garden: it cuts your water bill, keeps plants growing through dry spells, and rainwater is gentler on plants than tap.

Here's how to set up a DIY rain barrel from a bin, safely and without any plumbing skills.

What you'll need

• A clean, food-grade barrel or sturdy lidded bin (200 litres is common)
• A spigot or tap kit for the outlet
• A downpipe diverter kit
• Fine mesh or screen
• Blocks or a stand to raise it
• A drill with a hole saw

Build it step by step

1. Choose a barrel with a lid, and if it's reused, be certain it never held anything toxic.
2. Fit the tap. Drill a hole near the base and seal the spigot in with a washer or silicone.
3. Screen the inlet. Cut an opening in the lid and cover it with fine mesh to keep out debris and stop mosquitoes breeding.
4. Connect the diverter. Fit a diverter into your gutter downpipe and run it to the inlet — diverters send overflow back down the pipe automatically.
5. Raise it on blocks. Height gives you gravity pressure at the tap and room to fit a watering can underneath.
6. Add an overflow near the top, directed well away from the house foundations.
7. Wait for rain — the first good downpour fills it.

Using rainwater wisely

Rainwater is perfect for lawns, borders, ornamentals, and watering the base of vegetables. As a sensible precaution — roof runoff can carry contaminants — water the soil rather than edible leaves you'll eat raw, keep the barrel covered, use the water reasonably fresh, and don't drink it. It pairs beautifully with moisture-holding beds like a hugelkultur bed.

Set up a barrel of your own? Share your build in the comments at ecoxee.com — every liter saved counts.