Simpson Aluminum 4200 PSI
#9 in GasFull review
For pressure washing businesses that want a CAT pump and a rustproof frame at full 4 GPM flow. The steel frame PS4240 does the same work for less.
Amazon $1,397$1,397
3.2/5
A compact, ready to run washer for homeowners who want 3400 PSI without a pro price. The short pump warranty is the trade off.
- 3,400 PSIPressure
- 2.5 GPMFlow
- 25 ftHose
- 1 yearWarranty
Check price at Amazon$359
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Comes fully assembled, so it is ready to clean after adding oil and gas
- Low profile frame on pneumatic tires rolls well over gravel and grass
- 3400 PSI is enough for driveway oil stains and paint prep
Cons
- The pump is covered for only 1 year
- No 25 degree tip and no detergent system listed
The Simpson Clean Machine family
Every Simpson Clean Machine model we rank, smallest first. Ratings compare each against its own power source.
| Model | Pressure | Rating | Price |
|---|---|---|---|
| Simpson Clean Machine 2900 PSI | 2,900 PSI | 3.0/5 | $278.74 |
| Simpson Clean Machine 3200 PSI | 3,200 PSI | 3.2/5 | $329 |
| Simpson Clean Machine 3400 PSI (this one) | 3,400 PSI | 3.2/5 | $359 |
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its power source. How we rank explains each one.
Specifications
| Model number | CM61083 |
|---|---|
| Cleaning | |
| Pressure | 3,400 PSI |
| Flow | 2.5 GPM |
| Cleaning units | 8,500 |
| Nozzles included | 4 |
| Power | |
| Power | Gas |
| Engine or motor | 208 cc (CRX 210) |
| Pump | Axial cam |
| CARB compliant | No |
| Build | |
| Hose | 25 ft |
| Weight | 64 lb |
| Warranty | 1 year |
Alternatives in this power source
Westinghouse WPX3000
#10 in GasFull review
A light, low cost washer for homeowners with occasional deck and car jobs. Buyers who use soap often should look at the WPX3400 with its built-in tank.
Amazon $299$299
Simpson Aluminum 3600 PSI
#12 in GasFull review
A light, corrosion resistant Honda and triplex washer for small contractors and serious homeowners. It costs less than the CAT pump ALH3228 with more pressure and a longer hose.
Amazon $701.99$701.99
Compare
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