Simpson ALH3228-S - 3400 PSI 2.5 GPM Gas Pressure Washer With Honda Engine
The Simpson Aluminum ALH3228-S is a gas-powered pressure washer offering a maximum water pressure of 3400 PSI and flow of 2.5 GPM. (Read full specs)
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Description
Designed to surpass the demands of the cleaning professional, the SIMPSON® Aluminum Series 3400 PSI @ 2.5 GPM pressure washer is built to perform. Built with a powerful Honda engine, reliable triplex pump and ultra lightweight aircraft grade aluminum frame, this gas pressure washer is great for construction, equipment upkeep, facility & fleet maintenance cleaning.
Zoom on the Simpson ALH3228-S
In a nutshell, the Simpson ALH3228-S is a commercial pressure washer, which not only offers an all-around versatile cleaning experience, but that also allows:
- precise spot cleaning of hard, unpainted surfaces, reaching elevated areas, and effectively removing stubborn stains
- comprehensive cleaning of hard surfaces, vehicle washing, and readying surfaces for painting
- gentle cleaning for sensitive surfaces, and wide coverage cleaning with low pressure
- using cleaning solutions, and rinsing surfaces to remove residue
The following sections will present you in detail its power characteristics and design, its main features and all the additional features it has to offer.
Power
Utilizing a 196cc (5.5 hp) engine, this machine's triplex pump can deliver a pressure of 3400 PSI (around 57 times stronger than a standard garden hose) and a flow rate of up to 2.5 GPM (CETA-certified values). Thus, the Simpson ALH3228-S achieves a cleaning power of 8500 Cleaning Units.
For this gas-powered pressure washer, the Honda GX200 engine is started using a time-tested pull-start mechanism.
Gasoline is stored in a steel fuel tank with a maximum capacity of 0.8 gallon.
Design & Handling
Featuring a wheelbarrow design, the Simpson ALH3228-S prioritizes maneuverability and stability, ensuring smooth handling and reliable functionality in demanding cleaning applications. Crafted from lightweight aluminum, the frame ensures effortless mobility and superior corrosion resistance, ensuring long-lasting durability even in outdoor conditions. The reversible handle offers further versatility, as its different positions make the unit less bulky when stored.
Weighing in at 74 lbs, it's safe to say this unit isn't lightweight, which might pose difficulties for users when it comes to lifting and transporting, particularly over uneven surfaces. The major reasons for its heavy weight are its 196cc Honda GX200 engine, the triplex pump and aluminum frame. Despite this, the presence of two 10" pneumatic wheels reduces the complexity of moving the ALH3228-S, even on rugged surfaces.
Main Features
Along with the Simpson ALH3228-S itself, the package also includes a spray gun, a wand, a pressure hose, 5 nozzles and a detergent injection feature, which are discussed in further detail below.
- Soap injection: Detergent is fed in through a siphon hose, since the device lacks a soap tank. The Simpson ALH3228-S includes an automatic soap dilution mechanism, allowing detergent to be diluted to the ratio of 7:1 with ease. Once a soap nozzle is connected, the pressure washer automatically blends the detergent with the water flow.
- Pressure hose: For easy organization, the included 25 ft ⌀5/16" high-pressure hose can be stored on the unit using a set of convenient hooks when it's not in use, ensuring a clutter-free workspace.
- Spray gun and wand: Both the classic ergonomic spray gun and its steel wand may be conveniently stored in a side hook.
- Nozzles: Find details on the 5 included nozzles and their recommended surface applications in the table below.
0° | 15° | 25° | 40° | Soap | |
|---|---|---|---|---|---|
| Concrete, brick, masonry | |||||
| Siding, gutters, house | |||||
| Fencing, deck, patio | |||||
| Lawn equipment, boat, RV |
Kindly note: The shapes of the nozzles depicted above are for illustrative purposes and may vary. Symbols indicate suitability, with a signifying 'Not recommended,' a for 'Suitable,' and an for 'Use with caution.'
Other Features
- Onboard storage: The Simpson ALH3228-S features a handy storage area, which allows you to neatly store nozzles and accessories and be always prepared by having everything needed at hand.
- Safety: Safety of operation is enhanced by a thermal relief valve (which helps to prevent internal pump damage), a low oil protection and a trigger lock mechanism (which prevents accidental operation).
- Accessories: Included with the Simpson ALH3228-S are also the owner's manual (opens in a new tab) and some basic documentation to get you promptly started, along with several accessories, such as wand, oil, soap hose, spray gun and pressure hose.
Product Videos
The Simpson ALH3228-S's performance versus other pressure washers
The following charts are provided to give you an idea of how the key specs of the Simpson ALH3228-S compare to similarly priced pressure washers.
- The Simpson ALH3228-S with its 3400 PSI achieves a lower pressure value, compared to other gas-powered pressure washers in the $775-900 price range. If you're seeking the strongest water stream, look no further than the Simpson PS60843, which delivers an impressive 4400 PSI.
- When measured against items within the price range mentioned earlier, this washer, with its 2.5 GPM, falls on the lower end of achievable water flow rates. If being able to rinse away debris as efficiently as possible is your priority, one of the products with the highest GPM in this price range is the Westinghouse WPX4400, with 4.2 GPM.
- With 8500 Cleaning Units (PSI X GPM), the ALH3228-S is on the low end when compared to other similarly priced gas-powered devices. When it comes to the highest overall cleaning power in the current price range, one of the products at the very top currently is the Westinghouse WPX4400 and its 18480 Cleaning Units.
Price comparison
As you can see from these interactive charts, when compared to other gas-powered washers between 8000 and 8500 Cleaning Units, the Simpson ALH3228-S is on the average side of the price range.
Therefore, this pressure washer nicely fits in the expected budget for this kind of cleaning power.
The bottom line
- In the expected price range
- 10 year (limited) warranty
- Triplex pump
- Honda engine
- Designed to be stable
- Aluminum frame
- Good range of nozzles included
- Automatic detergent dilution
- Onboard storage
- Several security features
- No soap tank
- Low PSI for the price
- Low GPM for the price
- Low CU for the price
Features and Specifications
| Fuel | Gas-Powered |
|---|---|
| Engine | 196cc 5.5 HP Honda GX200 OHV 4-stroke |
| Pump | CAT 4DNX25GSI Triplex |
| Water | Cold (100°F max.) |
| PSI | 3400 |
| GPM | 2.5 |
| Cleaning Units | 8500 |
| Pressure control | Valve |
| Frame | Aluminum |
|---|---|
| Handling | Wheelbarrow |
| Wheels | 2 wheels, ⌀10", pneumatic |
| Weight | 74 lbs |
| Dimensions | Approx. 30 x 21 x 24 in (L x W x H) |
| Hose storage | Hooks |
| Soap injection | Via siphon hose |
|---|---|
| Soap dilution | 7:1 |
| Nozzles | 0°, 15°, 25°, 40°, Soap |
| Quick connect nozzles | Yes |
| Onboard storage | Yes |
| Hose | 25 ft, ⌀5/16 |
| Security | Low oil, trigger lock and thermal relief valve |
|---|---|
| Emissions | EPA |
| Included accessories | Oil, steel wand, spray gun, high pressure hose, soap hose, 5 nozzles |
| Warranty | 10 years |
| Series | Aluminum |
| Other model numbers | 60735 |
| UPC | 879399001642 |
We've taken extra care to research and verify each of the specifications above. That said, occasional mistakes or omissions are still possible. If you spot any missing or inaccurate information, feel free to suggest a correction so we can address it.
About Simpson
Simpson has over 50 years of experience making quality products for the outdoor power equipment industry. Part of the FNA Group based in Pleasant Prairie, Wisconsin since 2006, they are a vertically-integrated company, meaning most of the parts and accessories are manufactured and assembled by them. Their manufacturing facilities are international, but their gas-powered pressure washers are made in the USA. With the company motto "Driven by Performance", Simpson continues to offer a great variety of pressure-washing systems for the homeowner or the professional contractor.
Warranty Information
The Simpson ALH3228-S is covered under a warranty for up to 10 years. This warranty may be limited and may not cover all parts of the unit.
For more information about the warranty of Simpson pressure washers, please contact the Simpson Customer Support: 1-877-362-4271.




User Reviews
Simpson makes quality products. It has a Honda engine (like the old Briggs&Straton), which is bullet proof. The CAT Triplex pump is industrial grade. If you use this PW the average of 50hrs per year, it’s a ten year pump. If you take care of the pump, it’ll last much longer or you can use it, like I do, for light commercial use. The frame makes this machine light; I lift it in and out of my truck. Simpson customer service is a little lacking, but you will not call often. I think they are a very small company, that still uses paper and fax machines. I didn’t get all my nozzles; I literally got (4) 0 degree and (1) 15 degree. Called and they quickly apologized and said they send me the other 3 asap. ASAP took about 2 weeks, but I wasn’t in a rush. It’s pricey, but for the money, it competes with PW that run in the $850 to $950 range. Most other PW, in the price range, have either the CAT pump or the Honda or neither.