How to Set Up a Backyard Garden Rain Barrel for Water Savings

Last Updated on October 17, 2025 by D. Ruddy

Remember that scorching summer when your water bill skyrocketed? Watering the lawn and keeping your plants alive felt like a never-ending expense. What if there was a way to collect rainwater and reduce that bill? Installing a garden rain barrel is a fantastic solution, and you can easily do it yourself. This post will guide you step-by-step through the process, from choosing the right barrel to connecting it to your downspout, helping you save water and your hard-earned money. You’ll gain practical knowledge to start your own rainwater harvesting system, improving your gardening and your wallet. You’ll learn how to install a garden rain barrel in your backyard, giving you the power to conserve water resources and thrive as a gardener.

Key Takeaways

Learn to select the best type of rain barrel for your needs.
Understand the essential tools and materials required for installation.
Discover the straightforward steps involved in setting up your rain barrel.
Explore important safety considerations to ensure proper functionality.
Find out how to maintain your rain barrel for long-term water collection.
Get tips on how to effectively use the collected rainwater in your garden.

Choosing the Right Rain Barrel

Choosing the right rain barrel is the first important step. There are many types and sizes, so you’ll want to choose one that fits your space, your water needs, and your budget. Selecting the right barrel will make the entire process easier and improve your overall results.

Barrel Material

Rain barrels come in different materials. The most common are plastic, wood, and metal. Plastic barrels are the most popular because they’re lightweight, durable, and affordable. They’re also often made from recycled materials, making them a sustainable choice. Wood barrels offer a rustic aesthetic, but they require more maintenance to prevent leaks and rot. Metal barrels are very durable but can be more expensive and may rust over time if not treated properly.

Plastic Barrels: These are the most common type and usually made from polyethylene. They are durable, lightweight, and come in many sizes and colors.
Wood Barrels: These offer a classic look but need regular maintenance to prevent leaks and rot. Look for barrels made from cedar or redwood, which are naturally weather-resistant.
Metal Barrels: These are very durable and can last a long time, but they may be more expensive and could rust unless treated with a protective coating. Galvanized steel is a good choice to prevent rust.

Pro Tip: Make sure the plastic is food-grade, especially if you plan to use the water on edible plants. Consider UV resistance for long-term sun exposure.

Barrel Size

The size of your rain barrel depends on several factors, including the size of your roof, the amount of rainfall in your area, and how much water you plan to use. If you have a larger roof and get a lot of rain, you can get a larger barrel. Start with a smaller barrel and add more later if needed. A general rule is to have at least one inch of water storage capacity for every 100 square feet of roof area, especially if you are learning how to install a garden rain barrel in your backyard.

Small Barrels (50-75 gallons): Good for small gardens and areas with limited space or less rainfall.
Medium Barrels (75-100 gallons): A good balance for most average-sized gardens.
Large Barrels (100+ gallons): Ideal for larger gardens and areas with higher rainfall. Multiple barrels can increase storage capacity.

Example: If your roof is 1,000 square feet, a 100-gallon barrel might be a good starting point.

Features to Consider

Think about the features you need. A screen will prevent debris like leaves and insects from entering the barrel. An overflow valve prevents the barrel from filling up too much and spilling over. A spigot or tap at the bottom makes it easy to fill a watering can or attach a hose. A lid keeps out debris and prevents mosquito breeding. Also consider the color, as darker colors absorb more heat.

Screen: Prevents leaves, twigs, and insects from entering the barrel.
Overflow Valve: Diverts excess water away from your foundation.
Spigot/Tap: Allows easy access to the collected water.
Lid: Keeps out debris and prevents mosquito breeding.
Color: Darker colors absorb heat, which can be useful or harmful depending on your climate.

Gathering Your Tools and Materials

Once you’ve chosen your rain barrel, it’s time to gather the tools and materials you’ll need for installation. Having everything ready beforehand makes the process much smoother. You might already have many of these things.

Essential Tools

You probably have most of these tools in your home or garage. Make sure you have these handy before you start your project.

Measuring Tape: To measure the dimensions of the barrel and placement.
Screwdriver: For attaching the diverter and securing components.
Drill: To make holes for the spigot and overflow valve.
Saw (optional): If you need to cut the downspout.
Level: To ensure the barrel platform is level.
Gloves: To protect your hands.
Safety Glasses: To protect your eyes.

Necessary Materials

You’ll need a few extra supplies beyond the barrel itself. You can find all of these at your local hardware store.

Rain Barrel: Of course! Choose the one you like.
Downspout Diverter: Connects the downspout to the rain barrel.
Hose or Tubing (optional): For overflow and connecting to your garden.
Platform or Base: Bricks, blocks, or a wooden stand to raise the barrel.
Weatherproof Sealant (optional): To prevent leaks around the spigot and diverter.
Mosquito Mesh: To cover any openings.

Important Note: Consider checking local ordinances about rainwater harvesting before you buy your equipment. Some areas have regulations.

Step-by-Step Installation Guide

Now comes the exciting part: setting up your rain barrel. Follow these steps carefully for a successful installation. You will be amazed at how easy it is to install a garden rain barrel in your backyard.

Prepare the Area

Choose a level spot for your rain barrel. Make sure it’s close to a downspout and easy to access for watering your garden. The area should also be clear of any obstacles. Also, consider the weight of the full barrel when choosing the location.

Choose a Level Location: Prevents instability and ensures proper water flow.
Ensure Accessibility: Makes it easy to water your plants.
Clear the Area: Remove any obstacles like plants or rocks.
Consider Sunlight and Shade: Full sun can promote algae growth.

Example: Avoid placing the rain barrel directly under a tree to minimize debris.

Set Up the Base

The base is critical. You need to raise the rain barrel off the ground to provide gravity-fed water pressure. This helps when you’re filling a watering can or connecting a hose. It also keeps the barrel away from ground debris. Bricks, concrete blocks, or a sturdy wooden stand work well.

Build a Stable Base: Prevents the barrel from tipping over.
Raise the Barrel: Provides gravity-fed water pressure.
Use Leveling Blocks: Ensure the base is level.

Pro Tip: A raised base of 6-12 inches is often sufficient.

Install the Diverter

The diverter is a device that redirects water from your downspout into the rain barrel. This is usually the trickiest part, but it’s not hard. There are different types of diverters, so follow the manufacturer’s instructions. You might need to cut your downspout.

Measure and Cut: Cut the downspout to fit the diverter.
Attach the Diverter: Securely fasten the diverter to the downspout.
Connect the Hose: Connect the hose or tubing from the diverter to the rain barrel.

Warning: Make sure the diverter is properly secured to avoid leaks.

Connect the Overflow and Spigot

The overflow allows excess water to escape when the barrel is full, preventing damage. The spigot is where you’ll draw water. Most barrels come with pre-drilled holes for these components, but you might need to drill them yourself. Always add sealant to prevent leaks.

Attach the Overflow Valve: Install the overflow near the top of the barrel.
Install the Spigot: Place the spigot at a convenient height for filling watering cans.
Seal Connections: Use sealant to prevent leaks.

Final Checks and Adjustments

Before you get excited about collecting rainwater, double-check everything. Make sure all connections are secure, and there are no leaks. Check the screen on the inlet to make sure it’s installed properly. It’s time to test your system.

Inspect All Connections: Ensure everything is tight.
Check for Leaks: Fill the barrel with water and watch for leaks.
Test the System: Let it rain and watch the water flow.

Safety and Maintenance Tips

Safety and regular maintenance are critical. Simple steps will ensure that your rain barrel functions properly and lasts for many years. Regular upkeep keeps the water clean and the system running efficiently. After learning how to install a garden rain barrel in your backyard, you also need to learn how to keep it going.

Water Safety

While rainwater is generally safe for plants, it might contain contaminants from your roof. Always be cautious. Avoid drinking it unless you have a certified filtration system. Inspect your roof regularly to ensure it is clean.

Avoid Drinking: Unless filtered, rainwater is not safe for consumption.
Use for Gardening: Great for watering plants, lawns, and gardens.
Inspect Roof: Clean your roof regularly to minimize contaminants.

Caution: Do not use rainwater for indoor purposes like washing dishes unless it is properly filtered.

Regular Maintenance Tasks

Regular maintenance is essential to keep your rain barrel clean and functioning. Clean it twice a year, or more often if you live in an area with a lot of dust or pollen. Taking these steps will maintain the quality of the water.

Clean the Barrel: Twice a year, scrub the inside of the barrel to remove sediment and algae.
Clean the Screen: Remove debris from the screen regularly.
Inspect Connections: Check for leaks and tighten connections as needed.
Winterize: In areas with freezing temperatures, empty the barrel and disconnect it during winter to prevent damage.

Preventing Mosquitoes

Mosquitoes can breed in standing water, so it’s important to take steps to prevent this. Using a fine mesh screen on the inlet and outlet openings will keep out mosquitoes.

Use a Fine Mesh Screen: Cover all openings to prevent mosquitoes from entering.
Empty Regularly: Ensure the barrel is drained to prevent stagnant water.
Consider Mosquito Dunks: Place these in the barrel as an extra precaution.

Using Rainwater in Your Garden

Rainwater is excellent for your plants. It is naturally soft, free from chlorine and other chemicals often found in tap water. Your plants will thank you, and you’ll save on your water bill. Using it effectively makes all the effort of learning to install a garden rain barrel in your backyard even more rewarding.

Benefits of Rainwater

Rainwater is a natural source of water for your garden. It is better for your plants than tap water. It contains essential nutrients and is free of chlorine and other chemicals that can be harmful. It’s also better for the environment.

Free of Chemicals: Unlike tap water, rainwater is chlorine-free.
Contains Nutrients: Rainwater has natural nutrients beneficial to plants.
Environmentally Friendly: Reduces your reliance on treated water.
Cost Savings: Reduces your water bill, saving money.

How to Use Rainwater Effectively

There are several ways to use rainwater in your garden. Use a watering can, a hose, or set up a drip irrigation system. Always water the base of your plants, not the leaves, to minimize the risk of disease. Using rainwater will give your garden an extra boost.

Watering Can: A simple method for smaller gardens.
Hose Attachment: Attach a hose to the spigot and water your garden.
Drip Irrigation: Install a drip irrigation system for efficient watering.
Water at the Base: Direct water to the plant’s roots.

Common Myths Debunked

There are many misconceptions about rain barrels. Let’s clear up some of the most common ones.

Myth 1: Rainwater is always dirty and unsafe.

While rainwater can contain some contaminants, it’s generally safe for watering plants. Debris from your roof is often the biggest concern. A screen on the inlet will help filter out leaves and other large particles. Avoid using rainwater for drinking without proper filtration.

Myth 2: Rain barrels are expensive and hard to install.

Rain barrels can be surprisingly affordable, and installing one is a relatively easy DIY project. With basic tools and a bit of effort, you can set one up in a day. The long-term water savings will often make the investment worthwhile. There are many simple tutorials on how to install a garden rain barrel in your backyard.

Myth 3: Rain barrels attract mosquitoes.

Mosquitoes breed in standing water. However, you can easily prevent this by using a screen on all openings and ensuring your barrel has an overflow outlet. Regularly empty and clean your rain barrel to eliminate breeding grounds.

Myth 4: Rainwater harvesting is illegal.

Rainwater harvesting is legal in most areas. However, some areas may have regulations, so always check local ordinances before you begin. Most places encourage rainwater harvesting due to its positive impact on water conservation.

Myth 5: You can only use rainwater for gardening.

While rainwater is excellent for gardening, you can also use it for other outdoor purposes, such as washing your car, cleaning patios, or flushing toilets. However, never use it for drinking or other consumption without proper filtration.

Frequently Asked Questions

What is the best material for a rain barrel?

A: Plastic is the most popular due to its durability, light weight, and affordability.

How do I clean my rain barrel?

A: Empty the barrel, scrub the inside with soap and water, and rinse thoroughly. Consider cleaning it twice a year.

Can I use a rain barrel in a drought?

A: Yes, a rain barrel can help you conserve water and keep your plants alive during a drought. It provides a source of water when restrictions are in place.

What if my rain barrel overflows?

A: Ensure the overflow valve is installed correctly. You can also connect the overflow to a drain or a garden bed to distribute excess water.

Is it hard to install a rain barrel?

A: No, installing a rain barrel is relatively easy. The most difficult part is often attaching the diverter to the downspout.

Final Thoughts

You now have the knowledge and the steps to start collecting rainwater in your own backyard! The process of learning how to install a garden rain barrel in your backyard is not hard. You can start saving water, money, and supporting a sustainable lifestyle. You’ve gained insights into the materials, the installation, and the maintenance of a rain barrel system. Now is the time to embrace the benefits of rainwater harvesting. Take the first step by purchasing your rain barrel, gathering your tools, and following the installation guide. You’ll be contributing to water conservation and providing your plants with a natural, beneficial water source. Start your rainwater harvesting project today and watch your garden flourish!