🧼 How to Properly Connect a Pressure Washer Gun to Your Foam Cannon Setup

Upgrading your detailing gear is always exciting, but sometimes getting new tools to work with your existing setup can be confusing. One of the most common questions we get is how to properly connect a new pressure washer gun to a foam cannon, especially when adapting it to your current pressure washer hose. In this guide, we’ll walk you through everything you need to know to make the connection correctly—and avoid frustration along the way.

🔗 Why the Connection Matters

A secure and leak-free connection is essential not just for convenience but also for performance. A poor fit can reduce water pressure, cause leaks, or even damage your equipment over time. Fortunately, with the right fittings and a little know-how, you can connect your new pressure washer gun to your foam cannon in minutes.

🧰 What You’ll Need

Here are the components you’ll typically need for a successful connection:

• MTM Hydro Easy Hold SGS28 Spray Gun w/ SS QC Fittings
• PF22 FOAMER - Foam Cannon
• Quick connect fittings (usually ¼” for the foam cannon side and 3/8” for the hose side)
• Thread sealant tape (PTFE/Teflon tape for threaded connections)

🛠️ Step-by-Step Connection Guide

🔍 Step 1: Identify Your Fittings

Most foam cannons connect to a pressure washer gun via a ¼” quick connect plug, while most pressure washer hoses connect to the bottom of the gun via a 3/8” male or female thread. Take a moment to inspect both ends of your new gun to determine what fittings you’ll need.

Pro Tip: Many guns don’t come with fittings pre-installed, so you’ll likely need to add them yourself.

🔧 Step 2: Attach a ¼” Quick Connect Coupler to the Front

This is the end where your foam cannon connects. Use Teflon tape on the threads (typically a ¼” NPT thread) and screw in the quick connect coupler. Tighten with a wrench, but don’t overtighten—you want a snug, leak-free seal.

🔩 Step 3: Attach a 3/8” Quick Connect Plug to the Rear

This is where your pressure washer hose will attach. Again, use Teflon tape, and screw in the 3/8” plug. Make sure it matches your pressure washer hose (check if your hose is M22 or quick connect already).

Important: If your hose uses an M22 connection, you may need an M22-to-3/8” quick connect adapter.

🧽 Step 4: Connect the Foam Cannon

Now that your fittings are installed, simply snap the foam cannon into the ¼” coupler at the front of your gun. If it doesn’t click into place or feels loose, double-check that the plug and coupler are the same size and type.

🚿 Step 5: Connect to Your Pressure Washer Hose

Attach your pressure washer hose to the 3/8” quick connect plug at the bottom of the gun. Again, ensure a firm click. Turn on the water supply, power up the pressure washer, and test the setup.

⚠️ Troubleshooting Common Issues

• Leaking at the Threads: Try rewrapping the threads with Teflon tape and tightening again.
• Foam Cannon Won’t Click In: Check that you’re using a ¼” coupler and plug—not all brands follow the same standard.
• Loss of Pressure: Make sure your fittings are secure and that there are no obstructions in your gun or hose.

✅ Final Thoughts

Setting up a pressure washer gun with your foam cannon isn’t complicated, but it does require matching the right parts. Taking the time to get the connections right will ensure a high-performance, leak-free detailing setup that saves time and makes washing your car more enjoyable.

If you're unsure which fittings you need or want a plug-and-play solution, we offer complete pressure washer gun kits with all fittings pre-installed—just connect and start foaming!

📹 Reference Video

Here is a reference video from Veloci Performance Products: