DIY Rain Barrels: Save Money & Water Sustainably - Learn How To Make One! (2024)


We love rain barrels! They’re simply containers that capture and store rainwater for future use. The cost of water these days, they can pay for themselves quickly. DIY rain barrels can save you even more. And they help with water rationing and scarcity issues. Rain barrels are a good compliment to other watering methods.

How Does A Rain Barrel System Work?

A roof works as a collection surface and as rain falls, the water collects usually in rain gutters. A downspout connects to the barrel using some type of downspout diverter to direct the roof runoff into thebarrelvia the downspout. Units specifically designed to operateasrain barrelsfeature a covers to prevent animals, mosquitoes, dust, and light from contaminating storedwater.

How Much Rainwater Can You Collect?

One of the first questions asked by those considering adding a rain barrel system to their garden is. How much water does it take to fill a 55-gallon barrel with water? It takes roughly 1/2 inch of rain to fill the typical 50-55 gallon drum with water from an average roof.

Here are the numbers… For every inch of rain falling on 500 square foot of roof, it adds up to approximately 300 gallons of water. Most areas in the US could collect over 1,000 gallons of potable water per year to use in watering container gardens, house plants, vegetable garden and even your lawn.

Tips and Considerations

  • Use a screen to keep out debris
  • Location, location, location
  • Keep the rain barrel covered with a lid to prevent mosquito breeding and algae growth
  • Empty first collected water if concerns of roof contaminants are a concern
  • Do not use rain barrels on a roof containing asbestos
  • Collected rain water is not for human consumption or as drinking water – plants only

Benefits of Rain Barrels

  • A Money Saver – with this free water conservation source homeowners save on their water bills. Lawn and garden irrigation accounts for 40 % of residential water use according to the EPA. Using rain barrels, homeowners can save roughly 1,300 gallons of water during the growing season.
  • Healthy Plants and Soil – Rainwater does not contain the same additives found in tap water like inorganic ions and fluoride compounds which over time, accumulate in soil. This makes the water goof for venus flytraps. This accumulation can potentially harm plant roots and microorganisms in the soil. Clean rainwater helps clean the soil of salt buildup which benefits plants and their roots.
  • Reduction of Runoff – Rain barrels help conserve water and reduce stormwater runoff which flows directly into streams, lakes and other nearby bodies of water from storm drains. Rains pick up soil, oil, lawn fertilizer run-off, pesticides and other contaminants that can increase algae growth in lakes for example.

How To Make A DIY Rain Barrel


Clean water is a precious commodity. Many people around the world would improve the quality of their life if they only had access to clean water. The idea to collect rainwater is not new. However, in today’s “green movement” we see many gardeners install plastic rain barrels by the home foundation to collect water for irrigating their plants and garden.

Constructing a DIY rain barrel system is easy (how-to video below). Attaching a spigot or hose bib near the bottom of the barrel allows for the connecting a soaker hose or filling watering cans. You can also connect multiple barrels together to create a rain harvesting system.
Before you get excited about collecting rainwater with a barrel – make sure it’s legal! An Oregon man collected rain water on his property and found himself sentenced to 30 Days in jail.

Buy one inexpensively

Rain barrels can often be acquired for a good price or even free, when used. Try Craigslist! You can find rain barrel kits and complete systems to collect rainwater. Fiskars makes one, also Lowes, Home Depot and there’s even one called the Great American Rain Barrel.
With proper positioning under downspouts rain barrels can help you collect enough run-off to significantly cut your outdoor watering bill. Rain chains add a beauty to the water collection process as well!

Not only do plants love the pure, clean collect rain water, it helps the environment prevent wasted water. Don’t think rain barrels need to look hideous. They can get some interesting looks and painting them adds a splash of color and creativity to the “rain garden.”

How To Install A DIY Rain Barrel: The Basics of Prep, Place And Deal With Pests

As more and more people install and enjoy the benefits rain barrels provide, you’ll find all kinds of variations, tweaks, unique installations and entertaining art! But in order to get the most out of your “water harvest”, make sure it is set up correctly.

Over at Your Easy Garden they share the basics of setting up a rainwater harvest system with a barrel including the preparation, placement and handling pests. Here’s a few tips they share:

In late fall, empty, rinse and turn them over. In setting up each spring, rinse the interior and fill to the tap to check for leaks. During cold climates, trapped water can freeze and expand, cracking the plastic. The seal that holds the spigot in place may deteriorate with time and the elements. Some silicone sealer will fix it.
Place rain barrels under high-volume downspouts, close to the house or outbuilding and near garden beds and other areas you’ll use the water. Elevate them on sturdy cinder blocks so a bucket fits under the spigot. We slip a garden hose segment over the tap to direct water to the beds, so a little elevation also goes a long way.

Could Your Rain Barrel Be Harming Your Plants? A Look At Rain Barrel Hygiene

We work hard caring for our plants… for food (veggies) or for enjoyment (flowers). The last thing we want to do is put anything on them which could harm the plants or what they produce. Have you considered that the rain barrel water as a potential “harmful” source? No one wants a contaminated rain barrel with potentially harmful substances in it.

How To Install A Rain Barrel System

Rainwater collection works great for watering our plants and our lawn. It also serves as a great way to have rainwater when it’s not raining is to store it in a rain barrel. Now, city water weighs heavy with minerals and chemicals because of the process used to make it safe for us to drink. However, untreated soft rainwater does better for our plants and the soil.

For the average home, up to 40% of the water consumed goes to outdoor use such as caring for their lawns and landscapes. With the rain barrel, you can use the collected water even during watering restrictions or when the water supplly is short. It’s nice to have options when you’re caring for your plants and it costs zero.

Harvesting rainwater also reduces your eco footprint because you use less of it and it reduces the runoff that carries with it contaminants and sediments making their way into creeks and other water resources. And it’s not a new idea. Ancient civilization harvested their rainwater in cisterns for their communities too.

Fiskars Rain Water system

Today, people can choose from many ways to collect rainwater. Some will divert the water directly into the barrel, but once the barrel fills up, all that excess water overflows and some of that can go into your foundation or your basem*nt. Now, this rainwater system from Fiskars works with your existing downspouts and gutters and takes the water away from the house once the barrel becomes full. This worry-free downspout diverter system serves as the key. It channels the water into the barrel, but once the barrel goes full, the back pressure redirects the water to the spout and away from your house the way your gutters were intended to work.

Fiskars Rain Barrels come in a variety of sizes, styles and colors to complement your home. And in addition, they are eco-friendly. Now, it helps to put your rain barrel in an area to take advantage of all the rainfall and you want to have it where you’re going to do a lot of watering too.

Now on the roof surface of 500 square feet with a 57 gallon barrel, it will fill up in about an hour with a moderate amount of rainfall. It also helps to elevate your barrel to take advantage of gravity to move that water through a hose to other parts of your garden.

The main benefits to owning a rain barrel look clear. Installation and maintenance should work easy as well. With a few basic tools, you can install this system.

Fiskars Installation

After choosing where to install the rainwater harvesting system, prepare the ground to place the rain barrel. These rain barrels weigh heavy when full. So take the time to make the base firm and level. Install the spigot and hose connector on the rain barrel. Transfer the height of the rain barrel to the downspout and mark reference lines for where the diverter.

Cut the downspout on the lines and slide the diverter onto the top section of the downspout. Reattach the lower downspout. Measure and cut the connector hose.

With the lid in place, you only need for the rain to pour. Make sure to follow the detailed instructions attached with your system. To winterize the system, remove the filter which came with the diverter and tie the hose up against the downspout. You can also remove the hose and attach the cap included in the system. Next, turn the barrel upside down and put something heavy on it to keep it in place.

The Fiskars Rainwater Harvesting System appears and works unique for two primary reasons. First, the diverter channels the water into the barrel until the barrel becomes full and then back to the downspout and away from the house. Secondly, the diverter holds a filter in it to keep the downspout clean and debris-free.
The barrel looks really nice, making it a nice addition to your house and garden. Also, it also serves as a great way to lighten your environmental footprint.

DIY Rain Barrels: Save Money & Water Sustainably - Learn How To Make One! (2024)

FAQs

How to build a rain barrel cheaply? ›

How to Make a Rain Barrel from a Garbage Can in 5 Easy Steps
  1. Materials You'll Need.
  2. Step 1: Drill a Hole.
  3. Step 2: Attach and Seal the Spigot.
  4. Step 3: Make Entry and Exit Holes.
  5. Step 4: Screen the Top.
  6. Step 5: Place Your Rain Barrel.
Mar 3, 2022

Does a rain barrel save money? ›

Rain Barrels Save You Money

Since you can save around 1,300 gallons in just the summer, and the average cost of tap water is $2 per 1,000 gallons, you can potentially save $5 to $10 per year, depending on rainfall and yard usage.

What can I put in my rain barrel to stop algae? ›

[1] The EPA states, "Add 1⁄8 teaspoon (or 8 drops) of regular, unscented, liquid household bleach for each gallon of water, stir it well and let it stand for 30 minutes before you use it. Store disinfected water in clean containers with covers." Bleach will keep the algae at bay.

What are the disadvantages of a rain barrel? ›

Dispersion options are more limited, as sprinklers and long hose runs typically don't work well with rain barrels. Because the water is untested, do not drink water from the rain barrels. Some experts also warn about watering edible plants with rain barrel water, as it may be contaminated.

How many gallons of water can a rain barrel save? ›

According to the EPA, rain barrels have the ability to save the average homeowner 1300 gallons of water, which is a lot of water that does not become runoff. Rain barrels range in size from 30 gallon to 100 gallon containers and can be made of plastic or wood.

Do rain barrels need to be raised? ›

Elevate the rain barrel to increase water pressure by using the force of gravity to push water out of the barrel. Typically, rain barrels are elevated 12 to 36 inches above the ground. This creates enough pressure to move water through a spigot to fill a watering can or hose or use drip irrigation.

How long until a rain barrel pays for itself? ›

In an average year of rainfall we get 16.43 inches. So in an average year we'll collect 2,415 gallons in the tank. If I bought 2,415 gallons of water through our municipal water district it would cost $17.81. At that rate, it will take 37 years for the tank to pay for itself.

What is the lifespan of a rain barrel? ›

Repurposed locally from food condiment barrels, our high-grade plastic rain barrels are very durable and can last over 15 years if maintained properly.

How long can water be stored in a rain barrel? ›

It the rainwater is kept in a storage container without light or ability for other matter, animals, or insects, to enter, it can be stored forever. But that would not be useful. Usually you want to move water from one season into another. So usually you would not store water for more than a year.

What can I put in my rain barrel to keep it clean? ›

If using bleach is undesirable you can substitute hydrogen peroxide which acts as a mild antiseptic and comes in a 3 percent solution (labeled for household use.) Use 1 cup per gallon of water, slosh around in the barrel to coat all surfaces, and then dump the water and rinse or let air dry.

Do rain barrels attract mosquitoes? ›

Mosquitoes need water to lay eggs and grow. Without proper prevention measures, rain barrels can become a breeding ground (so can kids' pools, buckets, and puddles, by the way!).

Should I put bleach in my rain barrel? ›

Best Practices and Recommendations

Rain barrel users should make sure to clean the barrel with a 3% bleach solution before collecting water to irrigate a vegetable/herb garden. Household, unscented bleach with a 5–6% chlorine solution can be added at the rate of 1/8 teaspoon (8 drops) of bleach per gallon of water.

How to make a cheap rain barrel? ›

DIY Rain Barrel Instructions
  1. Purchase Your Barrel. First thing's first. ...
  2. Select Your Location. Before assembling your rain barrel, select and prepare the location where it will be used. ...
  3. Install The Spigot and Drain. ...
  4. Install The Fill Hose Seal. ...
  5. Prepare The Downspout and Install The Flexifit Diverter. ...
  6. Connect Your Barrel.
Jun 18, 2020

How fast will a 50 gallon rain barrel fill up? ›

It's common for about 1/8" inch of rain to fall each hour during a moderate rainstorm. That means that a 500 square foot roof can fill a properly installed 50-gallon rain barrel in about one hour.

What are the negative effects of rainwater? ›

Rainwater can carry bacteria, parasites, viruses, and chemicals that could make you sick, and it has been linked to disease outbreaks. The risk of getting sick from rainwater may be different depending on your location, how frequently it rains, the season, and how you collect and store the rainwater.

What can I use as a rain barrel? ›

Two types of plastic food grade 55 gallon barrels are typically used to make rain barrels; screw top (the whole top unscrews) and closed top (with two 2-inch "bung holes"). The screw top enables you to reach deep inside the barrel to work on the inside of the faucet.

How to make a rain barrel from a 5 gallon bucket? ›

Use a power drill with 7/8″ spade bit to punch a hole in the side of the 5-gallon bucket. This will make it easy to cut off the top with your jigsaw. Then secure a mesh paint strainer to the bucket opening to filter out objects and mosquitoes in your barrel or drum. Discard the rest of the bucket scrap.

How much does it cost to make a rain barrel? ›

Rain barrel cost estimator by size
MaterialSizeCost
Plastic50 gallons$85
Polyethylene65 gallons$200
Brass55 gallons$200
Oak50 gallons$170
Nov 29, 2023

How to get cheap barrels? ›

Local Food Distributors/Bottlers: This could be your best bet and was my method of choice. You will have to do some research and call around your city to find out if any food distributors use 55 gallon drums and if they would be able to give them to you for free or sell them at a low cost.

References

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