Pressure washer unloader valve


The inlet, inlet hose, and inlet valve. The intake filter. A regulator. The power pump.

Pressure Washer Unloader Valves

Out the outlet valve and outlet hose. Out the gun and pressure nozzle. The unloader valve redirects water from the pump when the gun is not in operation. Clean and unobstructed flow must be maintained for pressure washers to work right.

Power supply 2. Water supply 3. Hoses 4. Inlet valve 5. Intake filter 6. Nozzle 7. Gun 8. Pump, unloader, regulator and valves. Low Pressure Causes: Lack of power to machine. Incorrect water supply flow.

pressure washer unloader valve

Problems in the inlet area. Nozzle needs cleaning or replacing. Washer gun needs to be replaced. Unloader valve is going out or is misadjusted. Pressure Too High Causes: Nozzle is too small. Broken pressure gauge. Broken regulator. Surging Water Supply Causes: Incorrect water supply flow. Air in the system. Pump oil low. Dirty or obstructed valves.

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Pressure Washer Maintenance Review these care and maintenance tips to prevent pressure washer issues and damage. Video How to Diagnose Pressure Washers This article explains what pressure washer users need to know to maintain and diagnose pressure washer performance issues.If you buy an item via links on this page, we may earn a commission. Our editorial content is not influenced by commissions. Read the full disclosure. And obviously, the pressure is what makes the water come out at that kind of strength.

The main purpose of the unloader valve is to simply direct the water to the pump so that it can move to the hose and blast out of the spray gun.

This is of importance to your pressure washer because the unloader valve circulates the water around the pressure washing system so that no excess water gets out. Why do you need to adjust it, anyway? If you learned something, then share this with your friends or leave a comment. Hi there! This is Mattie. When I am not making DIY projects for my house, I spend most of my time researching and writing reviews of different products that you can buy online. I am an office worker turn full-time blogger, and I hope to help other homeowners like me on how to improve and reinvent your home using the best ideas and equipment.

How to Adjust Unloader Valve on Pressure Washers?

Click to Tweet. Related Posts.This is especially true for those who are new to using these devices. One of the most important pieces on the pressure washer is the unloader valve. Continue on to learn all about the pressure washer unloader valve. There are affiliate links on this site. This mean that at NO cost to you, I will receive a small commission if you purchase through my link. As the name implies, these machines create a lot of pressure, which can be damaging if they are aimed in the wrong direction.

Consequently, pieces like the unloader valve as well as the trigger gun work together to help avoid problems. In combination, these two pieces allow the user to have complete control over the flow of water. Typically, this means being able to get the flow started or stopped quite quickly. Meanwhile, in other cases it might mean that you can decrease the pressure the water is flowing at. There are often cases in which the person using a pressure washer needs to stop the flow of water without returning to the machine.

The unloader valve helps to do this by redirecting the water. Instead of the water continually flowing outward, it is returned to the machine. This is useful in a number of ways. In addition, it means that if for some reason water needs to be shut off quickly while the user is far away from the machine itself, the nozzle, with the help of the unloader valve, is able to ensure that water is turned off. Using the unloader valve is actually quite a simple process. In most pressure washer valves, the valve is connected with whether or not you are holding down the trigger.

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As you release that pressure, the valve will close and the water will stop. Unloader valves are useful in a number of ways. They can make the overall process of using a pressure washer easier, safer and more convenient. Some pressure washer nozzles may be able to reach a decent length away. Some nozzles can also allow you to adjust the amount of water pressure you have, which is great when you need to use it to clean a wider variety of things.

Not every surface will be able to handle the highest extent of the pressure that these machines are capable of creating. Too much pressure can damage surfaces, nearby objects or even people who happen into their path. Unloader valves allow you to decrease or shut down the pressure entirely.

On top of that, you can do it quickly, which means there is a much smaller chance of doing any real damage. In addition to the ability to keep users and nearby people safer, it also makes the pressure washer easier to use. With a greater pressure range, you can wash more surfaces with fewer concerns. Even the tools that are built for safety can end up creating different kinds of safety concerns. There are a number of ways in which the unloader valve is a helpful tool both for convenience and safety.

In order to return to the machine, the water may need up to twice as much pressure as it uses when the water is flowing normally. This can result in some serious problems with the machine, and a higher chance of the nozzle or pressure washer bursting, creating another safety risk. In some cases, the machines made with unloader valves may be designed to handle the return pressure.

However, making certain of that is going to be beneficial for your health as well as your investment. What is the Unloader Valve?

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What Does an Unloader Valve Do? How Does the Unloader Valve Work?

How to replace a pressure washer unloader valve

Why Is It Useful?If you buy an item via links on this page, we may earn a commission. Our editorial content is not influenced by commissions.

pressure washer unloader valve

Read the full disclosure. In order to change the pressure level of your pressure washer, you need to learn how to adjust unloader valve on pressure washer. This guide will show you how. There are some areas wherein you have to use weaker pressure than others. The unloader valve is a small part of a pressure washer that plays a big role in controlling the strength of the water coming out of your pressure washer. Of course, you need to learn how to adjust unloader valve on pressure washer. This guide will teach you all about adjusting unloader valve on pressure washer.

To know that, you should first know the other parts of the pressure washer too. Basically, you have the unloader valve, the nozzle the pressure gun, and the inlet valve.

When the water comes out from the pump, it goes to the pressure gun. Before that though, it goes through the unloader valve. The unloader valve is what will direct the water to the inlet valve so that the circulation of water is smooth.

Consequently, you need a reliable and powerful high-pressure hose. Click HERE to see the top options! As you can see, the unloader valve controls the amount of water that flows out.

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That is why it is important to know how to set unloader valve on pressure washer. Now that you know the important parts related to the unloader valve and how the unloader valve works, we can go on to the steps on how to adjust unloader valve on a pressure washer.

Fortunately, learning how to adjust unloader valve on pressure washer is really easy and will only require you to know a few steps.

These five steps can be considered as the preliminary steps that you take before you do the actual adjusting pressure washers.JavaScript seems to be disabled in your browser.

pressure washer unloader valve

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Wash Brushes. Chemical Injectors.Learning Center. Pressure Relief Valves. Thermal Relief Valves. Unloader Valves. The pressure cleaner's unloader valve functions as a safety device. Unloader valves control the direction of the flow of water exiting the pump. A positive displacement pump always delivers water, regardless of whether the spray gun is open or closed. When the spray gun is closed, the unloader valve redirects the flow of water back to the inlet side of the pump.

This prevents the build up of dangerously high pressure and guards against the failure of component parts.

Unloader Valve

Squeezing the trigger releases pressure. Releasing the trigger interrupts the flow of water to the nozzle, although the pump continues to run. Without an outlet for releasing this water, pressure would continue to build. A very dangerous situation would result. When water stops flowing from the nozzle of a spray gun, the unloader valve redirects it for a safe pressure outlet. It then circulates through the pump and back to the inlet side of the unloader valve. Water is once again either released via the spray gun, or redirected to the pump.

Although cycling prevents the dangerous buildup of pressure, added safety concerns arise during bypass mode. Moving parts in the pump create friction and heat which is transferred to the water flow in bypass.

pressure washer unloader valve

Cycling water can quickly be heated to dangerous temperatures as no cool water enters the pump during bypass. At higher temperatures, damage to the pump can occur.This guide will show you exactly how to troubleshoot pressure washer problems. Trust me, I know. All my neighbours now know me as the power equipment and pressure washer troubleshooting and tune-up guy.

We switched off the electric motor but kept the water running through the pump. After holding the trigger to keep the water running through the machine we managed to clear the air from the pump and lines. My neighbour turned the machine on again and it worked. Full pressure, no pulsing.

The goal of this entire page is to make the most useful pressure washer troubleshooting guide on the internet. We constantly update and improve this table.

It was last updated July 5, Use a needle to clear the nozzle tip of any debris. Any blocks at the nozzle will cause decreased flow and increased pressure in the systems, possibly triggering the unloader to enter bypass. Still experiencing water pressure problems? If there was no unloader valve then pressure would build inside the system when not in use so when you did pull the trigger it would stall the engine or explode a weak link part — probably the pressure hose o-ring.

The one on the left is from the Stanley gas pressure washer also shown in the above image on the left. It is a flow actuated unloader.

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The unloader on the right is from an AR Blue Clean electric pressure washer. It is a pressure actuated unloader. Both these assemblies can be taken out of the pump for cleaning and repair, without damaging them.

Many pressure problems begin and end at the unloader.

How To Adjust Pressure Washer Unloader Valve?

Use needle-nose pliers to remove the spark plug wire cover. Needle-nose pliers are very handy because they reach small areas to remove o-rings, seals and valves.

I use them often when tearing down a pump to fix water pressure issues. I also use them when putting it back together to seat valves and get o-rings and seals into position. I had a hard time deciding to put hex keys or needle-nose pliers first because they are both used often. Use screwdriver to get inside electric machines. Almost the only tool you need to disassemble electric pressure washers is a screwdriver. Torx head screws are also used once you get to the engine block.