Simpson Pressure Washer Review 2026: PS3228, ALH3425, PowerShot and Clean Machine
Quick answer: Simpson is the brand most often named for durable gas washers, with Honda and CRX engines, rebuildable triplex pumps and aluminum frames. The PS3228 and Clean Machine suit homes, and the PowerShot line suits heavy use. We have not tested them ourselves.
Last updated: October 2026. Simpson makes gas pressure washers used by homeowners and contractors. This review summarises specs from Of Zen and Computing, Pro Tool Reviews and Pressurist, and notes where sources disagree. We have not tested any Simpson washers ourselves.
What Simpson pressure washers are available?
| Model | PSI / GPM | Engine | Weight |
|---|---|---|---|
| PS3228 | 3,300 to 3,500 / 2.5 | Honda GX200 | 72 to 73 lb |
| ALH3228-S | 3,400 / 2.5 | Honda GX200 | 73 lb |
| ALH3425 | 3,400 (PTR: 3,600) / 2.5 | Honda GX200 | 78 lb |
| CM61083 Clean Machine | 3,400 / 2.5 | CRX 208cc | 61 lb |
| PS60869 PowerShot 4000 | 4,000 / 3.5 | Honda GX270 | 120 lb |
| PS60843 PowerShot 4400 | 4,400 / 4.0 | CRX 420cc | 135 lb |
| ALH4240 | 4,200 / 4.0 | Honda GX390 | 133 lb |
How good is the Simpson PS3228?
Pro Tool Reviews lists it at 3,300 PSI for $569. Other sources call it the best overall gas washer, as we cover in our gas guide. It has a triplex pump but no soap tank.
How good is the Simpson ALH3425?
At $699 with an aluminum frame and USA construction, Pro Tool Reviews calls it the best gas model. Of Zen and Computing gives a 10-year frame warranty.
How good is the Simpson Clean Machine?
The CM61083 delivers 3,400 PSI and 2.5 GPM with a 208cc CRX engine, weighs 61 lb and costs under $360 according to Of Zen and Computing.
How good are the Simpson PowerShot models?
The PS60869 (4,000 PSI, 3.5 GPM, Honda GX270, 120 lb) and PS60843 (4,400 PSI, 4.0 GPM, CRX 420cc, 135 lb) suit contractors. The ALH4240 has a Honda GX390, 4,200 PSI and a 10-year frame warranty. Of Zen and Computing notes that PowerShot models are not sold in California.
Simpson pros and cons
- Pros: Honda and CRX engines, rebuildable triplex pumps such as AAA and CAT, aluminum frames and US manufacture.
- Cons: large frames need storage room, higher prices and some models are restricted in California.
- Best for: homeowners through contractors who want durable gas units.
Why do the sources disagree on specs?
Simpson sells many similarly named variants, and retailers list slightly different PSI or weights. The PS3228 is variously listed at 3,300 or 3,500 PSI and the ALH3425 at 3,400 or 3,600 PSI. Always check the exact model code on the manufacturer’s page.
How does Simpson compare with DeWalt?
GasWasherHQ and EngiMarket suggest DeWalt for lighter, easier-to-use machines and Simpson for heavy use. Our Simpson vs DeWalt guide goes deeper.
Who should buy a Simpson?
Buy Simpson if you want a serviceable machine that lasts. Read our Honda-powered review for more on engines and our commercial picks for pro use.
Simpson quick verdict by need
| Need | Model | Why |
|---|---|---|
| Home use | PS3228 | 3,300 PSI Honda GX200 |
| Lighter unit | CM61083 | 61 lb, under $360 |
| Premium frame | ALH3425 | Aluminum, 10-year frame |
| Heavy duty | PS60843 | 4,400 PSI |
How do you look after a Simpson?
Change the engine oil on schedule, keep the air filter clean and use fresh fuel with stabiliser. Triplex pumps need periodic pump oil changes, so follow the manual. Use a fuel shutoff and drain the system before storage. Because the frames are large, store the machine on a level surface with room to open the hose reel and gun. Check the pump seals and unloader if pressure drops. Our winterizing guide covers cold-weather storage.
Where can you buy Simpson washers?
Simpson models are sold through home centres, dealers and online. Compare prices and check which variant you are getting, since retailers may carry exclusive model codes.
Which Simpson is right for you?
Homeowners cleaning a driveway, deck and fence should look at the PS3228, ALH3425 or Clean Machine. The Clean Machine is the lightest at 61 lb and undercuts the others on price, at under $360. Contractors should compare the PowerShot 4000, PowerShot 4400 and ALH4240, which offer higher flow of 3.5 to 4.0 GPM. Larger machines need a truck or ramp to move, and their weight of 120 to 141 lb is worth planning for before you buy.
Frequently asked questions
Are Simpson pressure washers good?
Sources praise their Honda or CRX engines, triplex pumps and durable frames.
Which Simpson is best for a home?
The PS3228 and the Clean Machine are the common home picks.
Are Simpson pumps rebuildable?
Sources describe their AAA and CAT triplex pumps as rebuildable.
Why is a PowerShot unavailable in California?
Of Zen and Computing notes that PowerShot models are not sold there.
Final verdict
Simpson is a top choice for durability. Start with the PS3228 or Clean Machine for home use, and look at the PowerShot line for demanding work.
Sources: Of Zen and Computing, Simpson pressure washer guide; Pro Tool Reviews, best pressure washers; Pressurist, Simpson models. Related: Simpson vs DeWalt, Honda-powered washers, Best commercial pressure washers.
