It needs to firmly connect the parts together and not break despite the constant tugging by the user Pressure washer gun and lance - This is the centerpiece of your setup. Make sure you choose a high-quality version that can handle the pressure output of your washer. For example: a 3/8″ pipe size according to NPT has a thread pitch of 0.05555 inches (1.411mm) and an outer diameter of 0.675 inches (17.145mm). That same 3/8″ pipe according to BSP has a thread pitch of 0.0526 inches (1.337mm) and outer diameter of 0.6560 inches (16.662mm).

Pros– Strong. Corrosion resistant. Easy to machine to different shapes. More affordable than stainless steel. It works by allowing swivel (spinning) of the hose without you having to twist the spray gun and extension wand in big circles. You can just walk it out and the gun swivel twists out the hose kinks as you walk. It’s one of those fittings you can’t pressure wash without once you try it. Brass is by far the most common fitting material for pressure washers. It is an alloy of copper and zinc and with its low melting point is easy to cast and machine.

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Pressure Washers & Parts has a high quality range of Hose Fittings uniquely designed for the use with high pressure washers and cleaners. Another benefit is safety. These fittings make it easier to connect and disconnect attachments, which means you’ll have less physical stress on your body. When you reduce the amount of time and effort it takes to change out attachments, you’ll reduce the likelihood of experiencing physical strain, making it easier and safer to use your pressure washer for longer periods of time. Extension wands - These long, thin attachments allow you to reach high or difficult-to-access areas with ease while maintaining a safe distance from the pressure washer. Even with digital calipers it can difficult. Some fittings are 3/8″, some are 22mm, some are 14mm on the inside diameter (some need to be 15mm), sometimes you’ll find fittings going off British pipe thread standards and some are labelled QC F or QC M to confuse.

Flow Rate: The larger diameter of the 3/8" fitting means that it can handle a higher flow rate of water. This can be beneficial when using larger nozzles or attachments that require a higher volume of water to clean effectively. Brass, plastic and stainless steel are the most common material used in pressure washer hose fittings. See also How To Troubleshoot And Repair A Pressure Washer That Won't Stay Running: A Comprehensive Guide Let’s take a deeper look what all the size mean on fittings. How to Measure Connections and Fittings Here are some other things to know about when talking power washer adapters: Male (M) vs. female (F) connections

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While the 3/8'' attachment may be more substantial, it doesn't take away from its usability. Once you have it attached to your pressure washer, it's easy to maneuver and use. This attachment is built like a tank, making it sturdy and long-lasting.