Simpson is unrivaled and extremely popular in the cleaning industry when it comes to pressure washers. From consumer-grade to commercial-grade, their power washers walk out.
Mostly every unit of Simpson looks and performs like a commercial-grade washer, so while they can be a great tool for your residential tasks as well. They are typically much stronger and more durable than 95% of the brands on the market. Yes, Simpson is the industry leader for a variety of reasons. However, not all of their power washers are equally effective for every type of cleaning we do. As a result, you must select the best one that meets your needs.
A Brief About Simpson Company
In 1961, Jack Simpson created the first pressure washer that started a new era of the leading cleaning industry until now. Having a monopoly on technology, Simpson gradually became influential and favored by many people because of its performance and durability over time.
With over 60 years of operation, Simpson is still leading in the cleaning field thanks to its outstanding advantages. Reliability and efficiency are always guaranteed at the highest level, while innovation is also emphasized to meet the needs of customers from all over the world.
Simpson is the industry leader for a variety of reasons. However, not all of their power washers are equally effective for every type of cleaning we do. As a result, you must select the best one that meets your needs.
Our Top Picks
- Best Residential: Simpson PS3228 PowerShot Pressure Washer
- Best Commercial: Simpson ALH4240 Pressure Washer
- Best Value: Simpson MS60773(-S) Pressure Washer
Best Residential: Simpsons PS3228 PowerShot Washer
Not only are the Honda engines powerful, but this specific one features an oil alert technology that ensures your machine never runs on low oil levels. The PS3228 PowerShot series is the best residential pressure washer that includes an industrial-grade triplex plunger pump with AAA certification and power boost technology to help users achieve consistent power transmission.
With this power, you can get up to 3300 psi at 2.5 GPM ideal for residential and commercial cleaning.
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- Technology Pump: AAA triplex pump
- Engine: Honda GX200
- Maximum Pressure: 3300 Pound per Square Inch
- Maximum Flow Rate: 3.5 Gallons Per Minute
Pros
- Extremely adaptable to a variety of surfaces and dirt levels.
- Spray gun with an ergonomic design
- Pneumatic tires make it extremely portable.
- Fuel efficiency
Cons
- Generates smoke with gasoline odor when still new
- High vibration when running
The compact steel design is complemented by 10-inch premium-grade pneumatic wheels that will transport the machine anywhere during your commercial cleaning assignments.
In addition, when you purchase and own the product, you will be provided with full accessories (including a spray gun, nozzles, pressure hose, engine oil, and siphon tube) to get started immediately. What you need to do is fill the fuel and start the cleaning process.
In my experience, I didn’t have any problems when using it, I even left it outside for hours in the sun for my experience but that didn’t seem to be an obstacle for them. For those who are still worried about quality, Simpson has a very good product warranty of up to 10 years.
This PS3835 PowerShot series has a variety of tips ranging from 0° to 15°, 25° to 40°, and another for soap application. With the right pressure nozzles, you can clean on a variety of surfaces.
How it works for Long Term
I have tested PS3228 for the versatility of cleaning tasks and the results show that it can meet all homeowners’ needs. The Simpson PS3228 is very durable, it has been used for 4 months but nothing happened. Each component was perfectly completed from the pressure hose to the body structure. The standard high-pressure hose 5/16-inch is kink- and abrasion-resistant very convenient for moving around your house or passing the landscape.
The most important is its power, I’m so surprised about quality stability when the pressure level is always guaranteed for a long time, I didn’t even intervene too deeply in the operating process because the manufacturer announced its maintenance-free AAA pump.
Editor’s Verdict: With average usage needs, this is a perfect choice for households. They can surpass expectations thanks to their extremely good and stable performance over a long period without requiring maintenance.
Best Commercial: Simpson ALH4240 Pressure Washer
A powerful and durable GX390 Honda engine is running this Simpson Aluminum series pressure cleaner at 3400 PSI and 2.5 GPM. Whereas the machine delivers high psi, it is protected from pump failure by an ingenious oil alert system.
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- Technology Pump: CAT triplex pump
- Engine: Honda GX390
- Maximum Pressure: 4200 Pound per Square Inch
- Maximum Flow Rate: 4 Gallons Per Minute
Pros
- CAT industrial-grade triplex pump that is dependable
- The aluminum frame of aircraft quality is lightweight.
- Pneumatic tires allow for easy maneuverability.
- Long-lasting performance of dual-steel braided hose
Cons
- Audible during operations
- The handle is too low
The Monster 50-foot hose inner is steel braided to withstand 4500 psi and protect it from kinking and abrasion. Your work is simplified by QC lance with a rapid threaded M22 connection to help you reach most hard-to-reach locations such as awnings, or gutters.
While most pressure washer engines will fail if the oil is not changed on time, Simpson’s Honda engine has an oil alert system that will notify you of an impending oil change.
The Cat Pumps high-pressure plunger pumps built-in Simpson ALH4240 are currently the longest-lasting and most reliable pumps on the market.
My friend claims he has continuously used this pressure washer with a built-in pump for 4 years without a single repair. I think Cat Pumps are weaker than AAA triplex pumps, but they are very stable since I haven’t seen a lack of water pressure during the cleaning process or intermittent water jets.
How It Works For Long Term
This is a high-end design to serve the professional cleaning needs of users, so I skipped light tasks to perform a test on this product.
I let them run continuously for 5 hours to test the stability and performance of the machine. As a result, nothing happened except that the smoke sometimes smelled like gasoline (only at first), everything else worked very stably. With a maximum pressure of up to 4200 psi, the ALH4240 can meet the rigorous demands of cleaning, especially removing oil stains in the yard (I tried with an electric pressure washer but could not completely remove them).
In general, after 7 months of testing and use, it still maintains a good condition, and the structure is still solid with no vibrations, the only thing is that it is a bit difficult to clean because it does not have a motor protection shield and pump.
Editor’s Verdict: A premium choice, although you may have to pay more than popular models, will satisfy you over a long period of use.
Best Value: Simpson MS60805(-S) Pressure Washer
The standard GCV170 Honda engine is running this Simpson MS60805(-S) series pressure cleaner at 3000 PSI and 2.4 GPM. Although the machine is not as powerful as the Aluminum Series, Cleaning Machine, and Water Blaster models, it is a suitable choice to handle simple household tasks. MS60805 engine is also equipped with a heat reducer to prevent overheating after long periods of continuous use.
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- Technology Pump: OEM Technologies axial pump
- Engine: Honda GCV170
- Maximum Pressure: 3000 Pound per Square Inch
- Maximum Flow Rate: 2.4 Gallons Per Minute
Pros
- Long-lasting and durable
- Lightweight aircraft-grade aluminum frame
- Honda GCV170 engine with easy-to-start
- Maintenance-free OEM Technologies axial cam pump
Cons
- The engine does not have a low oil level warning
I used this machine continuously for 6 hours and didn’t need to do anything except refueling to keep the machine running. The pressure washer operates stably for a long time without interruption due to overheating or any issues.
The power of the triplex plunger pump is enough to help you perform basic tasks like washing your driveway, house, or even your car perfectly. What I like about this machine is the MorFlex series pressure washer hoses, they allow connecting standard M22 threaded pipes to suit different types of machines on the market.
Unlike other hoses on the market, the Morflex pressure hose is made from extremely durable polyester material that effectively resists twisting and folding.
Simpson’s cleaning machine is housed in an aircraft-grade aluminum frame, making it light and portable. This Simpson pressure washer comes standard with never-flat wheels. The 12-inch wheels make it simple to move the pressure washer over almost any terrain.
How it works for Long Term
Even though Simpson MS60805(-S) is not equipped with advanced technology like other high-end Simpson products, this machine still operates very stably. Although the highest pressure that can be achieved is 3000, in my tests they can remove moss stains on the yard for a long time, and even handle oil stains flowing from my car for a perfect surface.
During 3 months of continuous use, the product surface seemed to have no damage because it is all made from highly durable metal. The machine’s performance remains stable (testing shows no change in water pressure).
Editor’s Verdict: A choice in the more reasonable price segment for those who want to use Simpson’s product line. The product comes with accessories to help you clean more effectively
Simpson Pressure Washer Models
For each different need, Simpson specifically designs each segment to serve to ensure the best experience for users within their budget. We will provide you with some of the most popular product models so you can choose the product that suits your needs.
Simpson divides them into two uses: civil purposes and commercial purposes in addition to industrial purposes. Each sample will represent a different purpose, which you can refer to below.
- Residential: Clean Machine, MegaShot
- Commercial: PowerShot, Aluminum, and Water Blaster
- Industrial: Industrial, Water Shotgun
There are many differences between each model but overall there are a few key points of distinction such as power (PSI or GPM) and pump technology.
 |  |  |  |  | |
|---|---|---|---|---|---|
| MegaShot | PowerShot | Aluminum Series | Clean Machine | Water Blaster | |
| PSI | 3200 | 3300 | 3600 | 3400 | 4200 |
| Technologies pump | OEM axial | AAA triplex | AAA Triplex | OEM axial | CAT triplex |
| Engine | Honda | Honda | Honda | CRX | Honda |
| Best for | Residential | Residential | Commercial | Residential | Commercial |
Other Options Should Be Considered
Obtaining a complete and highly accurate assessment requires our experts to test many different tests over a very long period to get accurate numbers. From an expert’s perspective, tests mainly highlight the product’s functionalities when applying them to actual use.
In 2024, we tested more than 14 models of Simpson pressure washers of different types. Because this is a product line in the high-end segment, the tests are selected very strictly with more than 10 tests on water pressure, stability, mobility, durability,…
Besides the best options recommended above, we tested a product in the budget segment, the Simpson MSH3125 MegaShot 3200 PSI Gas Pressure Washer. This version is the lowest in the Simpson family, but it has many purchases. MSH3125 can handle most basic tasks at your home with a moderate capacity and especially a reasonable price. However, the pump technology is still OEM, the performance is not great and is often more unstable than other models.
We tested more powerful versions such as ALH3228-S, ALH3425, and ALH4240 of the Aluminum Series. However, the biggest difference between the above models is the water pressure that is sprayed when used. It can be useful for several different tanks. In our opinion, if you are a household user, a water pressure of 3200-3400 PSI is completely suitable.
All Simpson models from MegaShot to Water Blaster can apply detergent by connecting the siphon tube and sucking the solution from the bucket.
The MS60809(-S) and MS60773(-S) both have a different design than most Simpson designs. The two main parts: the pump and the motor are arranged vertically and this structure makes it difficult for you to maintain or clean. However, this design will help you save storage space and is suitable for families with small warehouses.
With the need to use pressure washers for industrial purposes to handle super heavy-duty jobs such as cleaning industrial machinery, cleaning ships, etc., Simpson also has a special product line. Simpson ALWB60828, Simpson WB60824 Water Blaster, and Simpson PS60843 are extremely powerful pressure washer models with a capacity greater than 4000 PSI.
Why You Should Trust Us
When it comes to finding the best Simpson pressure washers, we understand that you want reliable and accurate information to make an informed decision. At our publication, we take the responsibility of providing trustworthy recommendations very seriously. Our team of experts is dedicated to conducting thorough and meticulous tests on various pressure washers, including those from the Simpson brand, to ensure that we deliver reliable and unbiased reviews.
Our team consists of seasoned professionals with extensive knowledge and experience in the field of pressure washers. We have spent years researching, testing, and evaluating different models to understand their performance, durability, and overall quality. Our expertise allows us to identify the key features and specifications that make a pressure washer stand out from the competition.
Diffirents Between Triplex & Axial Cam Pump
Axial cam pumps are direct drive pumps, rotating at the same speed as the engine. Thanks to the above operating mechanism, they provide stronger performance than any other pump but will degrade faster. This is a common type of pump that you can find in most popular pressure washer lines because of its simple structure and low price.
On the other hand, triplex pumps are considered high-end, commercial or industrial pumps. They are larger pumps with a crankshaft and piston system that provide greater capacity and longer life. They have a different drive system than axial cam pumps in that the power is transmitted indirectly, this helps the pump have high stability and the pump parts are less likely to wear out if used for a long time.
The RPM of the pump will affect its lifespan, but any triplex pump is suitable for more hours than an axial pump and they are considered serviceable pumps.
In addition, AAA does not require maintenance, you only need to perform some minor replacements such as replacing the check valve and seals as required by the unloader to continue using it.
Explore Simpson Maintaining Accessories
To keep your pressure washer in the best condition, don’t forget to regularly maintain and store it the right way. Over time, the quality of engine oil will degrade, so you need to continue replacing motor oil periodically according to the manufacturer’s recommendations. In addition, proper storage and winterization when not in use will prevent engine deterioration. Here are some accessories to help you maintain better from Simpson.
This is a high-end product that helps maximize pump performance when in use. Pump oil is recommended by Simpson to be replaced at the following levels:
- After the first 50 hours of use
- Every 3 months
It helps lubricate the pump piston during long-term maintenance. Usually in winter, the need to use the car washer will be less and you often choose to store it in the warehouse for the next use. The period of non-use will be quite long so you need to apply the solution to protect the pump parts.
Timely replacement of o-rings in different parts of the car washer will limit leaks due to rubber degradation, which is also the cause of the machine losing pressure.
FAQs
1. Are Simpson pressure washers great?
Yes. Simpson has spent over 50 years designing and manufacturing ergonomic cleaning solutions. As a result, they are one of the most well-established pressure washer companies with high-quality products.
2. How long can a pressure-cleaning pump operate?
An engine or motor powers the pump in pressure washers. Higher-powered engines produce more PSI and GPM. Most gas engines have a lifespan of 300 to 3,000 hours. Because electric pressure washers use pumps, they last longer than pumps.
3. GPM vs PSI: Which is more important in pressure washers?
PSI refers to the pounds per square inch or simply pressure. GPM, on the other hand, is the flow of water per minute, which is commonly expressed in gallons per minute. Both of these factors are critical when selecting a pressure cleaner. Effective cleaning needs the right PSI to strip and push dirt away. In this case, the GPM represents your rinsing power, which typically carries dirt and grime away.
Conclusion
The Simpson is an excellent pressure washer for both commercial and residential use. It is compact and lightweight, making it easy to transport and operate. It is also easy to clean, with a removable hose and a built-in cleaning system. The Simpson is ideal for cleaning all kinds of surfaces, including metal, concrete, brick, stucco, wood, and more.
