A pressure washer is a versatile tool used for cleaning a variety of surfaces, from driveways and decks to cars and outdoor furniture. But if you’re new to pressure washing, you may come across terms that you’re not familiar with, like M22. So what exactly does pressure washer M22 mean?

M22 refers to the size of the fitting used to connect the hose to the pressure washer. It is a standard size that is used in most residential and commercial pressure washers. The “M” stands for metric, indicating that the size is measured in millimeters. The number “22” refers to the diameter of the fitting. Therefore, M22 fittings have a 22mm diameter.

The M22 fitting is commonly found on pressure washers with medium to high pressure ratings. It is known for its durability and leak-free connection, making it the preferred choice for many pressure washer users. The size and design of the M22 fitting ensure a snug fit between the hose and the pressure washer, preventing any water leakage during operation.

In addition to its compatibility with most pressure washers, the M22 fitting is also compatible with a wide range of accessories, such as spray guns, wands, and nozzles. This versatility makes it easy to customize and upgrade your pressure washing setup based on your specific cleaning needs.

So, the next time you come across the term M22 in relation to pressure washers, you’ll know that it refers to the size of the fitting used to connect the hose. Understanding this terminology can help you choose the right pressure washer and accessories for your cleaning tasks.

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Understanding Pressure Washer M22 Connections

When it comes to pressure washers, the term “M22” refers to a specific type of connection that is commonly used in the industry. Understanding M22 connections is important if you want to ensure compatibility and proper usage of your pressure washer.

The M22 connection, also known as a 22mm fitting, is a thread size that is commonly used in pressure washer hoses, guns, and other accessories. It is called M22 because it has a 22mm outside diameter, with a pitch of 1.5mm between the threads. This metric measurement system is widely used in Europe and other parts of the world.

Why is the M22 connection important?

The M22 connection is important because it allows for a secure and leak-free connection between different components of a pressure washer system. This means that the high pressure water can flow smoothly and efficiently, maximizing the cleaning performance of the pressure washer.

Additionally, the M22 connection is a standard size that is widely available in the market. This makes it easier to find compatible accessories and replacement parts for your pressure washer. It is important to note that while M22 connections are common, there are other thread sizes used in the industry, such as M18 and M14.

Using M22 connections correctly

When using pressure washer accessories with M22 connections, it is important to ensure a proper fit and tight connection. Here are a few tips for using M22 connections correctly:

  1. Inspect the threads of the M22 connections and make sure they are clean and undamaged.
  2. Apply thread seal tape or use a thread sealant to ensure a tight and leak-free connection.
  3. Tighten the M22 connections using the appropriate wrench or tool, but avoid over-tightening, as this can damage the threads.
  4. If you encounter compatibility issues or are unsure about the correct M22 connection to use, consult the user manual of your pressure washer or contact the manufacturer for guidance.
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By understanding pressure washer M22 connections and how to use them correctly, you can ensure a smooth and efficient cleaning experience with your pressure washer. Properly maintaining and using M22 connections will help prolong the lifespan of your pressure washer and maximize its cleaning performance.

What is a Pressure Washer M22 Connection?

A pressure washer M22 connection refers to the type of fitting used to attach the hose of a pressure washer to the wand or gun. M22 is a specific measurement that denotes the size of the fitting, which is commonly found on many commercial and high-end residential pressure washers.

M22 Fitting Size

The M22 fitting size is a metric measurement that refers to the 22mm diameter of the fitting. It is named after the thread design used for the connection, which is known as “metric standard 22mm thread.” This design is widely used for pressure washer connections due to its durability and compatibility with various pressure washer accessories.


M22 connections are commonly found on pressure washers rated for higher pressure and flow rates. They are often used in commercial settings, such as car washes, industrial cleaning, and professional pressure washing services. The M22 fitting size allows for a secure and tight connection that can withstand the high pressures generated by these powerful machines.

Additionally, M22 connections are generally compatible with a wide range of pressure washer accessories, such as different types of spray nozzles and extension wands. This makes it easier to customize the pressure washer setup according to specific cleaning tasks and requirements.

Adapters and Converters

In some cases, you may come across a pressure washer with a different fitting size that does not match the M22 standard. In such situations, adapters or converters can be used to make the connection. Adapters are designed to bridge the gap between different fitting sizes, allowing you to connect hoses and accessories without needing to replace the entire setup.

It’s important to note that using adapters or converters may affect the overall performance and efficiency of the pressure washer. Ideally, it’s best to use accessories and fittings that are designed specifically for the M22 connection to ensure optimal compatibility and performance.

In conclusion, a pressure washer M22 connection is a specific type of fitting used to connect the hose of a pressure washer to the wand or gun. It is commonly found on commercial and high-end residential pressure washers due to its durability and compatibility with various accessories. Adapters can be used to connect different fitting sizes, although it’s recommended to use accessories designed for the M22 connection for optimal performance.

Benefits of Pressure Washer M22 Connections

Pressure washer M22 connections offer several key benefits that make them a popular choice among users. These benefits include:

1. Versatility

One of the main advantages of pressure washer M22 connections is their versatility. The M22 connection is a widely used standard in the industry, which means that M22 fittings are compatible with a wide range of pressure washer hoses, guns, and accessories. This allows users to easily connect and disconnect different components without the need for additional adapters or specialized fittings.

2. Secure and Leak-Free Connection

Pressure washer M22 connections provide a secure and leak-free connection between the hose and the gun or other attachments. The M22 fittings have a threaded design that ensures a tight seal, preventing any water or detergent leaks. This not only helps to maintain efficient operation but also reduces wasted water and minimizes the risk of damage to the equipment.

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3. Durable and Long-Lasting

M22 connections are known for their durability and longevity. The threaded design of the fitting, combined with high-quality materials, ensures that M22 connections can withstand high-pressure applications and frequent use without wearing out or failing. This durability makes M22 connections a reliable choice for professional and residential pressure washing needs.

4. Easy to Connect and Disconnect

With M22 connections, it is quick and easy to connect and disconnect pressure washer hoses, guns, and accessories. The threaded design allows users to simply twist the fittings together or apart, eliminating the need for complicated locking mechanisms or specialized tools. This ease of use not only saves time but also improves the overall user experience.

5. Wide Availability of Accessories

Due to the popularity of M22 connections, there is a wide availability of compatible accessories in the market. Users can easily find a variety of spray nozzles, extensions, brushes, and other attachments that are designed to connect directly to M22 fittings. This allows users to customize their pressure washing setup according to their specific needs and easily replace or upgrade accessories when needed.

How to Choose the Right Pressure Washer M22 Connection

When choosing a pressure washer, one important factor to consider is the type of connection it uses. Many pressure washers use the M22 connection, which is a standard connection size for pressure washer hoses and accessories. However, not all M22 connections are the same, and it is important to choose the right one for your specific needs.

Consider the Pressure Rating

One of the first things to consider when choosing a pressure washer M22 connection is the pressure rating. Different pressure washers have different maximum pressure ratings, and it is important to choose a connection that can handle the pressure produced by your machine. Look for an M22 connection that matches or exceeds the maximum pressure rating of your pressure washer.

Check the Thread Type

Another important factor to consider is the thread type of the M22 connection. M22 connections can have either a 14mm or 15mm thread, and it is essential to choose the right thread type for proper compatibility with your pressure washer and its accessories. Check the user manual or specifications of your pressure washer to determine the correct thread type.

Note: Using an incompatible thread type can result in leaks or a poor connection, which can affect the performance of your pressure washer.

Additionally, it is crucial to ensure that the M22 connection is compatible with the accessories you plan to use. Some accessories may require specific M22 connection features, such as a swivel joint or quick-connect capability. Be sure to check the compatibility requirements of your accessories to ensure a proper fit.

In conclusion, choosing the right pressure washer M22 connection involves considering the pressure rating, thread type, and compatibility with accessories. Taking the time to select the correct connection will ensure optimal performance and prevent any issues or leaks that could affect the effectiveness of your pressure washer.

Tips for Maintaining and Troubleshooting Pressure Washer M22 Connections

Pressure washer M22 connections are commonly used in the industry for their durability and reliability. However, like any other component, they require proper maintenance and occasional troubleshooting to ensure optimal performance. Here are a few tips to help you maintain and troubleshoot your pressure washer M22 connections:

1. Regularly inspect the connections: It is important to visually inspect the M22 connections on your pressure washer for any signs of wear or damage. Look for cracks, leaks, or loose fittings. Replace any damaged or worn-out parts to prevent further problems.

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2. Clean the connections: Over time, dirt, debris, and other contaminants can accumulate on the M22 connections, affecting their performance. Use a soft brush and mild detergent to clean the connections and remove any stubborn residue. Rinse them thoroughly with water and allow them to dry before reconnecting.

3. Lubricate the connections: Applying a small amount of lubricant to the M22 connections can help prevent rust and corrosion. Use a high-quality lubricant specifically designed for pressure washer connections. Apply the lubricant to the threads and fittings, then gently tighten the connections.

4. Use proper technique when connecting and disconnecting: When connecting or disconnecting pressure washer M22 connections, it is important to use the proper technique. Avoid overtightening or cross-threading the fittings, as this can lead to leaks and damage. Use a wrench or pliers to ensure a secure yet gentle connection.

5. Check for leaks: After connecting the M22 fittings, turn on the pressure washer and inspect for any leaks. If you notice any leaks, tighten the connections or replace any faulty parts. Leaks can reduce the efficiency of your pressure washer and waste water.

6. Troubleshooting common issues: If you encounter any issues with your pressure washer M22 connections, such as leaks or reduced water flow, there are a few troubleshooting steps you can take. Check for any blockages in the connections, clean or replace any clogged filters, and ensure that the water supply is adequate. If the problem persists, consult the pressure washer’s manual or contact a professional for further assistance.

By following these tips, you can ensure that your pressure washer M22 connections remain in good condition and provide reliable performance. Regular maintenance and troubleshooting will help extend their lifespan and prevent any costly repairs down the line.

Questions and answers,

What does M22 mean on a pressure washer?

M22 refers to the thread size of the fitting used on the pressure washer. It is a standard size that is commonly used in the industry.

Can I use a different size fitting on my pressure washer?

No, it is important to use the correct size fitting on your pressure washer. Using a different size fitting can lead to leaks or other problems.

Where can I buy M22 fittings for my pressure washer?

M22 fittings can be purchased at many hardware stores or online. There are also specialty stores that sell pressure washer accessories.

Are M22 fittings universal?

M22 fittings are considered to be a standard size and are commonly used in the industry. However, it is always best to check the specifications of your pressure washer to ensure compatibility.

What are some other common thread sizes used on pressure washers?

In addition to M22, some other common thread sizes used on pressure washers include 3/8″, 1/4″, and M18. The specific thread size will depend on the make and model of the pressure washer.

What does M22 mean in pressure washer fittings?

M22 refers to the thread size of the pressure washer fittings. It means that the fittings have a 22mm diameter thread.

Why is M22 size important in pressure washers?

M22 size is important in pressure washers because it determines the compatibility of the fittings. You need to make sure that the fittings on your pressure washer have the same thread size as the attachments you want to use.