If you’ve ever used a pressure washer, you know how powerful these machines can be. They can quickly blast away dirt, grime, and other tough stains with ease. But to get the best results, you need to make sure your pressure washer is set up correctly, and that includes adjusting the pressure on the pump.
To adjust the pressure on your pressure washer pump, turn the pressure regulator knob clockwise to increase pressure or counterclockwise to decrease it. Refer to your user manual for specific instructions.
Perhaps you’ve noticed that your pressure washer isn’t working as well as it used to, or maybe you’re a first-time user looking for some guidance. Whatever the reason, learning how to adjust the pressure on your pressure washer pump is essential for getting the job done right. In this blog, we’ll show you exactly how to do it.
Types of Pressure Washer Pumps

Each type of pump has its own unique features and benefits, so understand the differences in order to properly adjust the pressure on your pressure washer. Below is a closer look at the three main types of pressure washer pumps: axial cam pumps, triplex plunger pumps, and wobble pumps.
Axial cam pump
Axial cam pumps are one type of pressure washer pump commonly used in residential and commercial pressure washers. They are known for their efficiency and reliability, and are able to generate high pressure output with relatively low horsepower.
However, to maintain the optimal performance of an axial cam pump, periodically check and adjust the pump’s pressure settings. This can be done by using a pressure gauge and adjusting the unloader valve or the pressure regulator valve as needed.
Follow manufacturer’s guidelines and recommended maintenance schedule for the pump to ensure its longevity and efficient operation.
Triplex plunger pump
Triplex plunger pumps are a type of pressure washer pump that use three plungers to create pressure. These pumps are commonly used in commercial and industrial settings because of their high-pressure capabilities and durability.
They are often used for heavy-duty cleaning tasks such as removing paint or cleaning concrete surfaces. Triplex plunger pumps require proper maintenance, such as regular oil changes and inspections, to ensure they continue to function effectively.
When adjusting the pressure on a triplex plunger pump, follow the manufacturer’s instructions carefully to avoid damaging the pump or causing injury.
Wobble plate pump
The wobble plate pump is a type of pressure washer pump that uses a circular plate to create pressure. The plate is connected to a piston that moves back and forth, creating a pulsating pressure that is used to power the spray gun.
This type of pump is typically found in smaller, less powerful pressure washers and is less expensive than other types of pumps. However, it can be less durable and may require more maintenance.
To adjust the pressure on a wobble plate pump, you can typically adjust the engine speed or use the adjustable pressure regulator on the pump itself.
Follow the manufacturer’s instructions for adjusting the pressure to avoid damage to the pump or injury to yourself.
Step by Step: Adjusting Pressure Using the Unloader Valve

One way to adjust the pressure on your pressure washer pump is by using the unloader valve. Below is the step by step through the process of adjusting the pressure using the unloader valve, so you can get the most out of your pressure washing experience.
Locate the unloader valve
In order to adjust pressure on a pressure washer pump, first locate the unloader valve. This valve is typically found on the side of the pump and can be identified by its small size and distinctive shape.
Once you have located the unloader valve, you can proceed with the process of adjusting the pressure by following the specific steps outlined in the manufacturer’s instructions.
Exercise caution when adjusting the pressure to avoid damaging the pump or causing injury.
Loosen the locknut
In order to adjust the pressure on a pressure washer pump using the unloader valve, the first step is to loosen the locknut. This will allow you to turn the adjusting screw and change the pressure setting on the pump.
Make small adjustments and test the pressure before making further adjustments. Tighten the locknut once you have achieved the desired pressure setting.
Adjust the pressure
Adjusting the pressure on a pressure washer pump is an essential task that helps you achieve better cleaning results. To adjust the pressure, you need to use the unloader valve and follow a step-by-step process.
By reducing or increasing the pressure, you can ensure that your pressure washer is working efficiently and effectively.
Note that adjusting the pressure too high can damage surfaces and potentially cause injury, so it’s crucial to follow the manufacturer’s instructions and safety guidelines.
Secure the locknut
In order to properly adjust the pressure on a pressure washer pump, secure the locknut. This step helps to ensure that the adjustment you make is maintained and doesn’t change unexpectedly.
To secure the locknut, use pliers or a wrench to tighten it in a clockwise direction. Once it’s tight, double check that the pressure is set to the desired level before using the pressure washer.
Test the pressure washer
Testing your pressure washer is an essential step before adjusting the pressure. It allows you to identify any underlying issues that may be affecting the performance of your pressure washer. To test your pressure washer, start by checking the water source and making sure the hose and nozzle are clear of any obstructions.
Then, turn on the pressure washer and check the pressure gauge to ensure it is within the recommended range. If the pressure is too low or high, you may need to make adjustments using the unloader valve.
By testing your pressure washer, you can ensure it is functioning properly and adjust the pressure more effectively.
Step by Step: Adjusting Pressure Using the Pressure Regulator

Adjusting the pressure on a pressure washer pump is a straightforward process that anyone can master with a little bit of practice. Here is the process of adjusting pressure using the pressure regulator on your pressure washer.
Whether you’re a seasoned pressure washing pro or just starting, following these steps will ensure you get the best results possible from your equipment.
Identify the pressure regulator
In order to adjust the pressure on a pressure washer pump, first identify the pressure regulator. This component is responsible for controlling the pressure output of the pump and can usually be found near the pump or on the spray gun.
Once you have located the pressure regulator, you can then follow the necessary steps to adjust the pressure to your desired level. Refer to the manufacturer’s instructions and safety guidelines when adjusting the pressure on a pressure washer pump.
Turn the pressure adjustment knob
In order to adjust the pressure on a pressure washer pump, one of the key steps is to turn the pressure adjustment knob. This knob can typically be found on the pressure regulator and allows for easy control over the pressure output of the machine.
By turning the knob, users can increase or decrease the pressure as needed for different cleaning tasks. Note that adjusting the pressure too high can damage surfaces and equipment, so use caution and follow manufacturer guidelines.
Test the pressure washer
This can be done by spraying water onto a surface and observing the strength of the spray. If the pressure is too high or too low, adjustments can then be made using the pressure regulator to achieve the desired pressure level. Testing the pressure washer beforehand ensures that the adjustments made are accurate and effective.
Step by Step: Adjusting Pressure with Nozzle Selection

Adjusting the pressure on your pressure washer pump is a relatively easy task that can make a big difference in the effectiveness of your cleaning. One of the key ways to adjust pressure is through nozzle selection.
Understand nozzle color coding
The nozzle color coding on pressure washers corresponds to the spray angle and determines the pressure output. Understanding the color coding system is important for adjusting the pressure on a pressure washer pump by selecting the appropriate nozzle.
Nozzles with wider angles (white or black) have lower pressure output, while those with narrower angles (red or yellow) have higher pressure output. Choose the right nozzle for the task at hand to ensure optimal cleaning and prevent damage to surfaces.
Choose the appropriate nozzle
Choosing the appropriate nozzle is crucial when adjusting the pressure on a pressure washer pump. Different nozzles have varying degrees of pressure and spray patterns, which can affect the cleaning performance and the safety of the user.
Select a nozzle that is suitable for the cleaning task and to always follow the manufacturer’s recommendations. By choosing the appropriate nozzle, you can achieve optimal cleaning results while minimizing the risk of damage or injury.
Attach the nozzle
In order to adjust the pressure on your pressure washer pump, attach the appropriate nozzle. The nozzle you choose will determine the pressure and spray pattern of the water being released from the pump.
By selecting the correct nozzle, you can effectively adjust the pressure and ensure that you are using the right amount of force for the task at hand. Make sure to consult the manufacturer’s instructions and safety guidelines when selecting and attaching the nozzle.
Test the pressure washer
To ensure the proper adjustment of pressure on a pressure washer pump, test the pressure washer. Testing the pressure washer allows you to assess the pressure output and identify any potential issues with the pump.
This step is crucial in achieving the desired pressure output and preventing damage to the pressure washer.
Troubleshooting Pressure Adjustment Issues
Following are troubleshooting pressure adjustment issues and provide step-by-step solutions on how to adjust the pressure on your pressure washer pump. Whether you are a professional cleaner or a DIY enthusiast, this guide will equip you with the necessary skills to keep your pressure washer running at its optimal level.
Insufficient pressure
Insufficient pressure in a pressure washer can be caused by several factors. First, check the water supply and make sure that the hose is not kinked or clogged. Next, check the nozzle for blockages or wear and tear. If the nozzle is damaged, replace it with a new one.
Also, check the pressure hose for any leaks or damage. If there is a leak, replace the hose. Another possible cause of insufficient pressure is a malfunctioning pump. In this case, it may be necessary to replace the pump or have it repaired by a professional.
Finally, make sure that the pressure regulator is adjusted properly, as this can affect the pressure output. If none of these solutions work, consult the manufacturer or a professional for further assistance.
Fluctuating pressure
One common issue when adjusting pressure on a pressure washer pump is fluctuating pressure. This occurs when the pressure output varies during use, which can be caused by a number of factors such as a clogged nozzle, worn spray gun, or insufficient water flow.
To fix this issue, check and clean the nozzle, replace the spray gun if needed, and ensure proper water flow to the pump. Maintain the right amount of pressure to avoid damaging the pump and ensure optimal cleaning performance.
Leaks in the system
Leaks in the pressure washer system can cause pressure adjustment issues. Check all the connections and hoses for any leaks. Leaks can occur at the pressure washer pump, spray gun, hoses, or fittings.
If there is a leak, it will affect the pressure output, and the pressure may not adjust properly. Fixing any leaks in the system can help to restore proper pressure output and improve pressure adjustment.
Conclusion
Adjusting the pressure on your pressure washer pump is easy. Simply turn the pressure regulator knob in the direction you want the pressure to go – clockwise to increase pressure, counterclockwise to decrease it. Check your user manual for more detailed instructions.
In conclusion, it’s crucial to emphasize the importance of correctly adjusting the pressure on your pressure washer pump. Not only does it ensure optimal cleaning results, but it also prolongs the life of your equipment. Neglecting this aspect can lead to damage to the pump or even injury to the user or bystanders.
Therefore, always prioritize safety and practice regular maintenance to keep your pressure washer in top condition. By following these guidelines, you’ll be able to efficiently and safely tackle any cleaning task with ease.