Pressure washer adapters & connectors

BISON is professional in producing pressure washer fittings and adapters.

BISON Machinery is one of the leading manufacturers of pressure washers, sewer /drain jetting machines, high pressure pumps, and functional pressure washer accessories, with CE, Rohs, and Euro5 certificated and patents more than 30. All metal parts are processed by precision processing equipment, and each one will be 100% inspected before leaving the factory.

Contact BISON immediately to send a wholesale request. We will help you choose the best pressure washer hose according to your needs. In addition, we also provide pictures, PDFs, videos, etc. to help you expand your business.

Pressure washer adapter set by BISON

adapter set (800 x 800 px)

1/4" high pressure quick disconnect fitting

Model No. Outlet Inlet Thread Material
A1 1/4″ QD Socket 1/4″ Male NPT or BSP Brass
A2 1/4″ QD Socket 1/4″ Female NPT or BSP Brass
A3 1/4″ QD Plug 1/4″ Female NPT or BSP Steel, Plated
A4 1/4″ QD Plug 1/4″ Male NPT or BSP Steel, Plated
A5 1/4″ QD Plug 1/4″ Male NPT or BSP Stainless Steel
adapter set (800 x 800 px) (1)

3/8″ high pressure quick disconnect fitting

Model No. Outlet Inlet Thread Material
B1 3/8″ QD Socket 3/8″ Female NPT or BSP Brass
B2 3/8″ QD Socket 3/8″ Male NPT or BSP Brass
B3 3/8″ QD Socket M22 Male NPT or BSP Brass
B4 3/8″ QD Plug 3/8″ Female NPT or BSP Steel, Plated
B5 3/8″ QD Plug 3/8″ Male NPT or BSP Steel, Plated
B6 3/8″ QD Plug M22 Male NPT or BSP Steel, Plated
B7 3/8″ QD Plug 3/8″ Female NPT or BSP Stainless Steel
B8 3/8″ QD Plug 3/8″ Male NPT or BSP Stainless Steel
adapter set (800 x 800 px) (2)

M22 swivel nut high pressure fitting

Model No. Outlet Inlet Thread Material
C1 M22*1.5 Swivel Nut 1/4″ Female NPT or BSP Brass
C2 M22*1.5 Swivel Nut 1/4″ QD Plug NPT or BSP Steel, Plated
C3 M22*1.5 Swivel Nut 1/4″ Male NPT or BSP Brass
C4 M22*1.5 Swivel Nut 3/8″ QD Socket 3/8“ QD 插座 NPT or BSP Brass
C5 M22*1.5 Swivel Nut 3/8″ QD Plug NPT or BSP Steel, Plated
C6 M22*1.5 Swivel Nut 3/8″ Female NPT or BSP Brass
C7 M22*1.5 Swivel Nut 3/8″ Male NPT or BSP Brass
C8 M22*1.5 Swivel Nut M22*1.5 Swivel Nut NPT or BSP Brass
C9 M22*1.5 Swivel Nut M22 Male NPT or BSP Brass
adapter set (800 x 800 px) (3)

High pressure changeing fitting, male to male

Model No. Male Male Thread Material
D1 1/4″ 1/4″ NPT or BSP Brass
D2 1/4″ 3/8″ NPT or BSP Brass
D3 1/4″ M22 NPT or BSP Brass
D4 3/8″ 3/8″ NPT or BSP Brass
D5 3/8″ M22 NPT or BSP Brass
D6 3/8″ 1/2″ NPT or BSP Brass
D7 M22 M22 M22*1.5 Brass
D8 1/2″ 3/4″ NPT or BSP Brass
adapter set (800 x 800 px) (4)

High pressure changeing fitting, female to male

Model No. Female Male Thread Material
E1 1/4″ 1/4″ NPT or BSP Brass
E2 1/4″ 3/8″ NPT or BSP Brass
E3 1/4″ M22 NPT or BSP Brass
E4 3/8″ M22 NPT or BSP Brass
E5 3/8″ 3/8″ NPT or BSP Brass

Pressure washer adapter set by BISON

Pivot coupler (800 x 800 px)

Pivot coupler
1/4″QC Pivoting Coupler 120 Degree

Pivot coupler (800 x 800 px)

Pivot coupler
1/4″QC Pivoting Coupler 240 Degree

2 pack M22-14 swivel (800 x 800 px) (2)

2 pack M22-14 swivel + 3/8″ plug,  
2 pack 3/8″ QD + M22-14 male,   
2 pack 3/4″ female + 1/2″ quick connect,   
2 pack 1/2″ plug+ 3/4″ male.

M22-14 swivel (800 x 800 px) (3)

M22-14 swivel + 3/8″ plug
3/8″ QD + M22-14 male

M22-14 swivel (800 x 800 px) (4)

M22-14 swivel + 1/4″ plug
1/4″ QD + M22-14 male

Pressure washer adapters picking guide

When using a pressure washer, it is sometimes necessary to replace or add a gun, hose, or quick-connect device, but these new parts are not always compatible with existing equipment. This is when an adapter is needed. Acting as a bridge between your pressure washer and a variety of accessories, hoses, and attachments, the pressure washer adapter allows different components to work together seamlessly.

Adapters usually have two different connection ports and can help you connect two parts that are not compatible. For example, you can use an adapter to connect a garden hose to a pressure washer or to convert a different-size quick connector to the desired size.

How do pressure washer adapters work?

The pressure washer adapter connectors are available to make the installation and removal of the washer easier. One set of connectors connects your faucet and garden hose together. Another set of connectors connects your garden hose to the pressure washer, and there is a third set of connectors that connects your pressure washer hose to the pressure washer pump.

In addition, some kits come with a connector for attaching the gun to the high-pressure hose. The kit only needs to be tightened once, after which it can be used permanently without having to be disassembled again. Once it is installed, it can be easily removed by simply snapping the connector together.

How do you choose the right pressure washer adapters?

In the process of using a pressure washer, we need to connect different attachments to extend the function and accomplish various cleaning tasks. However, when connecting the accessories, we need to pay attention to the matching between different interfaces. Generally speaking, the connection requires a male and a female connector.

The male connector is usually threaded and the female connector is threaded inside, so the male thread will enter the female thread. Specifically, Quick Connect connectors are not threaded, but the male connector can still be placed inside the female connector.

Two main adapter types:

The quick-connect adapter features a very convenient snap and lock mechanism for instant tool changes in seconds. It features a spring-loaded collar that connects and disconnects quickly when pulled back while maintaining a secure seal with an integrated O-ring. This design is particularly beneficial for work situations where accessories are frequently changed, which can significantly reduce downtime and increase workflow efficiency. It is also available in different sizes (1/4″ and 3/8″ are the most common).

Threaded adapters are the traditional connection method, providing a more compact connection through their screw-type design. Although they require more time to connect or disconnect, threaded adapters excel in applications that require maximum pressure retention and long-term connection stability, making them ideal for permanent connections. When properly sealed with PTFE tape or thread compound, leak-proof and pressure-handling capabilities are increased.

Note that two male connectors or two female connectors cannot be used at the same time, so you will need to use one male connector and one female connector when making the connection. Be sure to carefully select the matching connector to ensure a stable and secure connection for more efficient use of the pressure washer.

Choice of pressure washer adapter materials:

Brass adapter: Most commonly used in professional-grade equipment, it offers excellent durability, corrosion resistance, and long service life. Its rugged construction ensures reliable thread engagement and reduces the risk of cross-threading, making it ideal for demanding commercial applications. It should be noted that there is a risk of seizure if it is tightened vigorously.

Plastic adapter: More popular in consumer-grade equipment, it is cheap, lightweight, and easy to handle. It is suitable for light to medium-duty cleaning tasks. However, it has obvious limitations, including being less durable, less pressure-tolerant, prone to cracking, and more susceptible to damage from improper operation or extreme temperatures.

When using a pressure washer, we need to choose different kinds of accessories to match the interface of different equipment. The common connections are M22, 3/8″ thread, and quick connect. The only exception to this is the gun and the required connection assembly for the gun, which may be M22 or 1/4″. Therefore, when selecting an adapter or connecting the connection assembly to the gun, you will need to double-check whether the connection type required is M22 or 1/4″ to ensure proper use.

The following are common connection types provided by BISON:

M22 connection: With a 22 mm outer diameter and a 14 mm inner diameter, it is the industry standard for gas pressure washers and is mainly used for the connection from the pressure washer hose to the pressure washer gun. It accommodates both threaded and quick-connect versions. It is important to note that the same M22 screw connection on a power washer has an inner diameter of 15 mm.

3/8″ quick connection: The first choice for professional equipment, it provides excellent flow capacity and excels at tough work tasks, making it ideal for commercial pressure washers and heavy-duty accessories.

1/4″ quick connection: Popular in consumer devices, often with electric pressure washers, providing ample power for light applications.

NPT (National pipe thread): Mainly used in North American equipment, with a tapered thread design. Proper installation can form a better seal under pressure.

BSP (British standard pipe): It is an international standard thread, more common in European and Asian markets, and comes in parallel and tapered versions.

Safe installation of pressure washer adapters

Preparation steps

Before beginning installation, ensure that the pressure washer and water supply are completely shut off, check that the adapter and connection points are present and undamaged, and prepare all necessary tools such as wrenches, thread sealant tape (PTFE), clean cloths, etc.

Installation process

1.Threaded adapters: Always start threading by hand first and ensure proper alignment and thread engagement. After hand-tightening, use the appropriate tool for final tightening (avoid over-tightening). Thread sealant tape (PTFE) may be used.

2.Quick-connect adapters: Ensure perfect alignment before engaging the locking mechanism and verify that the O-ring remains properly seated throughout the installation process. Apply a small amount of lubricant if necessary.

3.Error check: Faulty connections often occur when forcing the connection without proper alignment or skipping critical hand-threading steps. Be careful not to over-tighten. In addition, inadequate thread preparation or improper use of thread sealants can lead to immediate leaks or gradual connection failures.

4.Testing: Prioritize safety while verifying proper functionality. During testing, maintain a safe distance and wear appropriate personal protective equipment, including safety glasses and closed-toe shoes. Start with a low-pressure test and carefully check all connection points for leaks or seepage. Gradually increase pressure while monitoring the installation, listening for any unusual sounds, and confirming that the flow is correct until normal pressure is reached.

Pressure washer adapter maintenance

1.Regular inspection: Check for water seepage before each use, check for wear or damage to the O-rings, and for good thread condition. Retest connection integrity and monitor pressure consistency.

2.O-Ring maintenance: Flexible sealing components gradually lose elasticity produce compression deformation and need to be replaced regularly. When replacing O-rings, carefully clean the O-ring grooves and select replacement O-rings that exactly match the original specifications. Apply a layer of lubricant during the process.

3.Storage: Store the adapter in a clean, dry environment away from direct sunlight and extreme temperatures. Use thread protectors or caps to prevent damage and contamination when the adapter is not in use. For long-term storage, apply a corrosion inhibitor to metal parts and store the adapter in a sealed container to prevent environmental exposure.

Conclusion

The right pressure washer adapter set is an essential investment in the success of your pressure washing operation. In this comprehensive guide, we explore the correct adapter selection, use, and maintenance. Quality adapters ensure steady water flow, optimal pressure distribution, and reliable connections, preventing costly downtime and maintaining professional service standards.

BISON is ready to be a trusted partner for dealers. For pressure washing professionals and businesses that deliver outstanding results, investing in quality equipment is non-negotiable. BISON pressure washer manufacturers have professional production plants and manufacturing processes that always outperform market alternatives, from well-designed pressure washers to advanced adapters. Contact BSION today to take your pressure washing business to new heights.

Pressure washer adapter set guides written by BISON pressure washer accessories experts

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