How to Make a Foam Cannon: A Complete Guide

  • By: Jose Whitmore
  • Date: May 14, 2023
  • Time to read: 11 min.

To make a foam cannon, you need a few materials and some basic tools. First, gather a bottle, foam cannon nozzle, pvc pipe, adhesive sealant, a drill, and a hose.

Then, drill a hole in the top of the bottle and attach the foam cannon nozzle. Cut the pvc pipe to the desired length and attach it to the nozzle. Finally, connect the hose to the pvc pipe and the foam cannon is ready to use. Foam cannons are devices that attach to a pressure washer and generate a thick foam spray that is useful for cleaning surfaces such as cars, boats, and houses. While you can buy pre-made foam cannons, making one at home can be a fun diy project that saves you money. In this article, we will look at the steps involved in making a foam cannon from scratch using easily available materials. Whether you are a diy enthusiast or simply looking to try something new, this guide will help you make your very own foam cannon.

Materials Required

Foam cannons have become a popular tool for car enthusiasts in recent years. They offer a quick, easy, and efficient way of cleaning vehicles without damaging the paintwork. While you can easily purchase a foam cannon from a car accessories shop, making one yourself can be a fun and inexpensive diy project.

In this blog post, we’ll show you how to make a foam cannon in just a few simple steps. So, let’s begin with the materials required.

A Plastic Spray Bottle

The plastic spray bottle is the main component of your foam cannon. You can find these in any hardware or grocery store. Look for a bottle that is at least 16 ounces in volume, so you can make sure it holds enough water and shampoo solution.

It’s better to choose a bottle with an adjustable nozzle, so you can adjust the water flow as per your requirements.

A Foam Gun Adapter

The foam gun adapter is a crucial component that produces the foam. This adapter screws directly onto the spray bottle nozzle, and when connected to the pressure washer, it sucks up the car shampoo and mixes it with water to create a thick and rich foam.

Foam gun adapters are readily available online or at car accessory shops.

A Bottle Of Car Shampoo

The type of car shampoo you use will determine the quality of foam produced. So, make sure to choose a quality shampoo that is designed for use with a foam cannon. Look for a ph neutral shampoo that is free from harsh chemicals, as this will help to protect the vehicle’s paint.


After adding the shampoo to the spray bottle, you need to add water to create the foam. Use clean and fresh water. Ideally, use warm water to help produce thick, rich foam. Fill the bottle to at least three-quarters of its capacity, as you will need enough water to dilute the shampoo and create the desired foam.

Duct Tape

Duct tape is an essential tool for this project. Use the tape to seal the connection between the bottle and the foam gun adapter. This will prevent any water or solution from leaking out.


Finally, you’ll need a drill to create a hole in the spray bottle cap. The hole should be appropriately sized to allow the adapter to fit inside. Make sure to drill the hole straight down, as any angle will cause the adapter to sit at a wrong angle.

Making a foam cannon is a simple and fun way to clean your car thoroughly. With just a few materials and tools, you can create a foam cannon that is both efficient and cost-effective. Get ready to enjoy the satisfaction of cleaning your car with your very own homemade foam cannon, and be sure to share your results with others!

Choosing The Right Bottle And Foam Gun Adapter

Foam cannons are an essential tool for any car detailing enthusiast. They make car washing quicker and easier while providing a deep and thorough clean. However, with so many options available, it can be challenging to decide which bottle and foam gun adapter to use for the best results.

In this section, we’ll discuss the key points you need to consider to choose the right bottle and foam gun adapter for your foam cannon.


Foam cannon bottles come in different sizes, shapes, and materials.

  • Size: foam cannon bottles usually range from 0. 5 to 1 liter. It’s best to select a bottle that can hold enough soap to cover the entire car without frequent refilling.
  • Material: the most common materials for foam cannon bottles are plastic and metal. Plastic bottles are lightweight and inexpensive but may not be durable if dropped or exposed to sunlight for extended periods. Metal bottles are more robust and sturdy but relatively heavy.
  • Dilution ratio: foam cannon bottles come with markings that show the dilution ratio. It’s crucial to ensure that the bottle’s dilution ratio is compatible with the soap you are using.

Foam Gun Adapter

A foam gun adapter connects the foam cannon bottle to the high-pressure washer gun. Selecting the right foam gun adapter is crucial for ensuring smooth operation and an even foam flow.

  • Compatibility: match the foam gun adapter to the make and model of your high-pressure washer gun.
  • Quality: a high-quality foam gun adapter ensures maximum stability and minimum leaks. Look for adapters made from materials such as brass, stainless steel, or aluminum.
  • Adjustable metering knob: most foam gun adapters come with a metering knob that adjusts the foam output. Look for a knob that allows you to control the foam output to get the desired thickness.

With the above points in mind, you can make an informed decision about which bottle and foam gun adapter to use with your foam cannon. By selecting the right tools, you can enjoy a deeper and more efficient clean when washing your beloved car!

Foam Cannon Starter Guide – Everything You’ll Need to Get Foaming!

Installing The Foam Gun Adapter

Foam cannons, when used properly, can help make the car washing process faster, easier, and more enjoyable. However, to get the most out of your foam cannon, you need to have a good adapter. In this section, we will talk about how to install the foam gun adapter.

Choosing The Right Adapter

Before you install the adapter, you need to make sure that you have the right one for your foam cannon. Some foam cannons come with adapters, while others require you to purchase an adapter separately. Check the foam cannon’s instructions or the manufacturer’s website to determine which adapter you need.

Steps To Install The Foam Gun Adapter

Here are the steps to install the foam gun adapter:

  • Rinse the foam cannon: before you start installing the adapter, rinse the foam cannon with water to remove any dirt or debris.
  • Unscrew the original nozzle: next, unscrew the original nozzle from the foam cannon. You may need to use pliers or a wrench to do this, depending on how tight the nozzle is.
  • Insert the adapter: once the original nozzle is removed, insert the adapter into the foam cannon’s trigger. Make sure that the adapter is securely in place.
  • Screw on the adapter: now, screw the adapter onto the foam cannon. Be careful not to over-tighten the adapter, as this can damage the foam cannon or the adapter.
  • Attach the foam cannon: finally, attach the foam cannon to the adapter. You can now use your foam cannon as usual.

Tips For Installing The Foam Gun Adapter

Here are a few tips to keep in mind when installing the foam gun adapter:

  • Make sure that the adapter is the right size for your foam cannon.
  • Use caution when tightening the adapter to avoid damage.
  • If you have trouble removing the original nozzle, try using a wrench or pliers.
  • Clean the foam cannon after each use to prevent clogs and damage.

Mixing The Soap

Foam cannons are an effective way to achieve a cleaner car wash experience at home. However, purchasing a foam cannon can be quite expensive, which is why some car owners prefer to make their own. In this post, we’ll guide you on how to make a foam cannon at home by using household items.

In this section, we’ll focus on a crucial step in the process – mixing the soap.

When it comes to washing your car with a foam cannon, the type of soap you use is crucial. You’ll need soap that has lubricating agents that will help protect your car’s paint during the wash process.

  • Start by filling a bucket with water, making sure to leave enough space for the soap.
  • Add the amount of soap recommended by the manufacturer into the bucket. Be sure to use a soap that is specifically formulated for foam cannons.
  • Mix the soap solution together thoroughly so that the soap dissolves and blends with the water.

Once you have mixed the soap solution in the bucket, you can add it to your foam cannon and adjust the dilution ratio according to the manufacturer’s recommendations. It is essential to follow these instructions for the most effective results.

It’s worth noting that some car enthusiasts prefer to add additional ingredients such as dish soap or vinegar to the mix to achieve the desired level of foam. However, we recommend sticking to soap that is specifically formulated for foam cannons.

It’s also essential to avoid using too much soap, as this can lead to the foam cannon not working correctly.

To make a foam cannon, you will need to choose the right soap that is formulated for use with foam cannons. Mix the soap in a well-proportioned ratio to ensure the best results when it comes to washing your car.

With these simple steps, you can make your foam cannon and enjoy a cleaner car washing experience.

Making Foam

Foam cannons are an amazing tool for car enthusiasts who want to give their vehicles a professional-level clean. The great news is that you don’t need to break the bank buying an expensive foam cannon. You can easily create one yourself with a few simple tools.

In this blog post, we’ll show you how to make a foam cannon at home, focusing on one of the essential steps, “making foam.

Necessary Tools For Making Foam

Before you start making foam, ensure that you have all the necessary tools at hand.

  • A 1l plastic bottle (you can repurpose an empty cleaning solution bottle)
  • A foam gun sprayer nozzle adapter
  • A drill with a 3/8-inch bit
  • A silicone sealant

Steps For Making Foam

Now that you have everything you need, follow these basic steps to create your foam cannon:

  • Drill into the bottle cap: using your drill, make a hole at the center of the bottle cap, using a 3/8 inch bit.
  • Attach the nozzle adapter to the cap: screw in the nozzle adapter tightly into the bottle cap. Ensure it fits in place nicely.
  • Seal the adapter: using a silicone sealant, seal around the nozzle adapter. Make sure it is watertight and secure.
  • Fill the bottle: pour some car wash shampoo into the bottle, and fill it with water, leaving 1 ¼ inch space at the top.
  • Shake the bottle: shake it well until the shampoo and water combine.
  • Attach and use the foam cannon: connect the foam cannon to your pressure washer. Adjust the settings on the cannon to get the desired foam.

Tips For Making Foam

Creating maximum foam is the ultimate goal of making a foam cannon.

  • Use the right soap: using a high-quality car wash shampoo that is specially formulated for use with foam cannons produces a better foam.
  • The dilution ratio is crucial: ensure you follow the shampoo manufacturer’s recommendation for diluting the soap properly. This will help to produce the best foam.
  • Shake the bottle well: properly mixing the shampoo and water is important; it determines the quality of foam you get.
  • The water pressure: adjust the pressure of your pressure washer until you achieve the desired foam thickness. Too much pressure creates less foam, while too little will produce a watery mess.

With a bit of creativity, you can create a homemade foam cannon that can help you keep your car or truck looking sparkling clean. Follow these instructions to get the perfect foam cannon you desire.

Final Thoughts

Foam cannons have become a popular tool for car enthusiasts looking to clean their vehicles with ease. Making your own foam cannon is not only cost-effective, but also allows for customization. In this article, we have discussed step-by-step instructions on how to make a foam cannon at home.

Now, let’s go over some final considerations before you start creating your own foam cannon.

Foam Cannon Cleaning Tips

After using your foam cannon, it is essential to clean it properly to maintain its longevity and performance.

  • Rinse the bottle thoroughly with hot water after use to remove any remaining soap and debris.
  • Soak the bottle and nozzle in warm water and dish soap for at least 30 minutes.
  • Use a small brush or toothbrush to scrub the nozzle and bottle to remove any stubborn residue.
  • Rinse the parts again with hot water and let them air dry.

Choosing The Right Soap

Using the right soap is crucial for achieving the perfect foam consistency.

  • Look for car wash soaps that are specifically designed for foam cannons. These soaps are formulated with high-quality ingredients that produce thicker foam.
  • Avoid using dish soap or other cleaning agents not designed for cars. These can strip your car’s protective wax and damage its clear coat.
  • Choose a soap that is ph-neutral to avoid damaging your car’s paint job.

Using Your Foam Cannon

Once you have created your foam cannon, it’s time to use it!

  • Fill the bottle with water up to the marked level.
  • Add the soap to the bottle, following the instructions provided by the manufacturer.
  • Shake the bottle gently to mix the water and soap.
  • Attach the foam cannon to your pressure washer and adjust the spray angle as necessary.
  • Test the foam on a small area of your car before applying it to the entire surface.
  • Rinse the car with water thoroughly after applying the foam to avoid leaving any residue.

Making your own foam cannon may seem overwhelming, but by following our step-by-step guide and these additional tips, you’ll be able to create the perfect foam cannon for your car cleaning needs. Happy cleaning!

Frequently Asked Questions Of How To Make A Foam Cannon

What Is A Foam Cannon?

A foam cannon is an attachment to a pressure washer that produces thick foam to cover a vehicle during washing. It uses a specialized soap solution mixed with water and compressed air to generate a dense foam that clings to the surface.

How Does A Foam Cannon Work?

A foam cannon works by mixing a soap solution with water and air to make thick foam that sticks to the surface being cleaned. The soap solution is placed in the foam cannon bottle, and the air pressure from the pressure washer generates the foam.


Creating your own foam cannon from scratch might seem like a daunting task, but with the help of this guide, it’s now easier than ever! Following these steps will not only save you money and time but will also provide an opportunity for customization to meet your unique foam cannon needs.

Remember, safety is always the top priority in any diy project. Be sure to handle all materials carefully and follow safety instructions closely. With a little patience and effort, you’ll have a foam cannon that matches the quality and effectiveness of commercial foam cannons.

Whether you are looking to clean your car, boat or patio furniture, this homemade foam cannon will give you the results you need. So, get to work and enjoy the satisfaction of creating your own high-quality foam cannon!

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