Simpson Clean Machine 3400 PSI
#11 in GasFull review
A compact, ready to run washer for homeowners who want 3400 PSI without a pro price. The short pump warranty is the trade off.
Amazon $359$359
The Simpson Clean Machine 3400 PSI is the better pressure washer overall, rated 3.2 to 3.0. The Simpson Clean Machine 3400 PSI leads on value and cleaning power. The DeWalt DXPW3300 Gas wins on warranty. The Simpson Clean Machine 3400 PSI costs $70 less ($359 vs $429).
DeWalt DXPW3300 Gas
#16 in GasFull review
A homeowner washer for buyers who want a longer pump warranty than budget brands. Similar output costs less from Westinghouse.
Amazon $429$429
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Simpson Clean Machine 3400 PSI for value ($42.24 per 1,000 cleaning units ($359, 8,500) vs $54.17 per 1,000 cleaning units ($429, 7,920)) and cleaning power (8,500 cleaning units (3,400 PSI x 2.5 GPM) vs 7,920 cleaning units (3,300 PSI x 2.4 GPM)).
- Choose the DeWalt DXPW3300 Gas for warranty (2-year warranty vs 1-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every gas pressure washer; a clear win is highlighted. How we rank explains each one.
| Factor weight | Simpson Clean Machine 3400 PSI | DeWalt DXPW3300 Gas |
|---|---|---|
| Overall rating | 3.2/5 | 3.0/5 |
| Value 35% | 80 $42.24 per 1,000 cleaning units ($359, 8,500) | 54 $54.17 per 1,000 cleaning units ($429, 7,920) |
| Cleaning power 30% | 58 8,500 cleaning units (3,400 PSI x 2.5 GPM) | 49 7,920 cleaning units (3,300 PSI x 2.4 GPM) |
| Hose 10% | 33 25 ft hose | 33 25 ft hose |
| Warranty 25% | 0 1-year warranty | 25 2-year warranty |
Specifications
| Simpson Clean Machine 3400 PSI | DeWalt DXPW3300 Gas | |
|---|---|---|
| Cleaning | ||
| Pressure | 3,400 PSI | 3,300 PSI |
| Flow | 2.5 GPM | 2.4 GPM |
| Cleaning units | 8,500 | 7,920 |
| Nozzles included | 4 | 5 |
| Power | ||
| Power | Gas | Gas |
| Engine or motor | 208 cc (CRX 210) | 208 cc (DeWalt OHV) |
| Pump | Axial cam | Axial cam |
| CARB compliant | No | No |
| Build | ||
| Hose | 25 ft | 25 ft |
| Weight | 64 lb | 64 lb |
| Warranty | 1 year | 2 years |