How to Make an Easy Water Balloon Cannon


A Water Balloon Cannon is considered an awesome thing around in summers. It is very popular among kids as they love to play water balloon drop games. It is even a beautiful addition to the Halloween setup.

In this guide, we will discuss a step-by-step guide to build your own DIY Water Balloon Cannon. You will need a lot of materials to make this cannon and all of them can easily be gathered from any local hardware store. So, let us jump onto the guide.

Steps to Make a DIY Water Balloon Cannon

Materials Required:

1 2″ SCH 40 Pipe, 1 1″ SCH 40 Pipe, 2 2″ Caps, 2 2″ Couplers, 3 2″ to 1″ threaded reducers, 3 1″ threaded to 1″ adapter, 1 1″ elbow to threaded 1″ elbow, 2 1″ Tee 1 1″ threaded sprinkler valve, 1 1″ 90 degrees elbow 1 1″ ball valve, 1 Air compressor quick adapter, 1 2″ Coupler 2 1″ caps, 1 Momentary switch, 1 25 ft doorbell wire, 1 plastic wire wrap, 1 Yellow High Gloss, 1 Black High Gloss, 1 Pipe Primer, 1 Pipe Glue.

You can easily find each of them in a local hardware store.

Step 1: Cutting the PVC

Cutting the PVC

Firstly, you must mark all the sections of PVC where you want the cuts. For cutting the pipes, it is recommended to use a handsaw. It is recommended to be calm and steady while cutting the PVC as they are prone to fracturing.

Step 2: Fitting it All Together.

Fitting it All Together

Dry Fit all the components together and check if every component is correctly fixed or not. It is easier to replace wrong fit components currently.

Compressed air is not required at that time.

Step 3: Installing Air Inlet

Installing Air Inlet

To install the Air Inlet, you must drill a small hole behind the off valve, you must make sure that it is slightly smaller than the threads on your quick fitting. Now, you must remove the PVC pipe tape and again reinstall it to complete the air fill and make it completely leakproof.

Step 4: Glueing the PVC Components

Glueing the PVC Components

To glue all the components, it is recommended to use the standard PVC primer and PVC cement. You must be very careful while gluing all the components and make sure you do not make any mistakes here.

Step 5: Wiring the Detonator

Wiring the Detonator

If you are skilled enough then you can use a soldering iron, otherwise, you can also twist the wires in the detonator and wrap them with electrical tape. Then, you must drill a hole in both the caps, one hole is for the switch, and another is for passing the wires. Place the 9V Battery to one end of the sprinkler valve and you must make sure that you do not glue the detonator as you need to replace the battery in the future.

Step 6: Painting all The Components.

Painting all The Components

It is upon you if you want to make your Cannon look more attractive then you can paint it. Paint the entire cannon with your favorite color and let it dry overnight. Once the paint is dry and all the components are correctly glued then you can reassemble everything using the pipe thread tape.

Step 7: Let It Try

Let It Try

Now, it is time to fire the water balloon cannon, fill the cannon with compressed air, and keep the value between 80 and 100 PSI. Fill the water balloons in the cannon and if they keep on bursting before leaving the cannon then you must reduce the air pressure.

Final Words

Creating a Water Balloon Cannon is not a difficult task, but you must be very careful while gluing all the components. All the materials required in this DIY project are easily available in the market.

Well, this is all about this project, if you like this one, then please check out our other projects. If you have any questions regarding this guide, then feel free to ask by commenting down below.

Madison Hall
With a background in Engineering from Stanford University, Madison Hall brings a unique perspective to the DIY world. With 15 years of experience in both engineering and DIY projects, she started contributing to our website in 2022. Her approach combines technical knowledge with experience, making her articles informative and accessible. Before joining us, Madison worked in a leading engineering firm focusing on sustainable building practices. She enjoys woodworking and exploring the latest tech gadgets in her leisure time.

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