Simpson Clean Machine 2900 PSI
#15 in GasFull review
A cheap, light gas washer for occasional deck and patio cleaning. Buyers who wash a lot of concrete will want more flow and a longer warranty.
Amazon $278.74$278.74
The Simpson Clean Machine 2900 PSI is the better pressure washer overall, rated 3.0 to 2.1. The Simpson Clean Machine 2900 PSI leads on value and cleaning power. The Champion 2800 PSI Low Profile wins on warranty. The Simpson Clean Machine 2900 PSI costs $221.25 less ($278.74 vs $499.99).
Champion 2800 PSI Low Profile
#20 in GasFull review
A decent light duty washer, but at its current Amazon price the Westinghouse WPX3400 gives more cleaning power for less.
Amazon $499.99$499.99
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 2900 PSI for value ($40.05 per 1,000 cleaning units ($278.74, 6,960) vs $85.03 per 1,000 cleaning units ($499.99, 5,880)) and cleaning power (6,960 cleaning units (2,900 PSI x 2.4 GPM) vs 5,880 cleaning units (2,800 PSI x 2.1 GPM)).
- Choose the Champion 2800 PSI Low Profile 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 2900 PSI | Champion 2800 PSI Low Profile |
|---|---|---|
| Overall rating | 3.0/5 | 2.1/5 |
| Value 35% | 86 $40.05 per 1,000 cleaning units ($278.74, 6,960) | 6 $85.03 per 1,000 cleaning units ($499.99, 5,880) |
| Cleaning power 30% | 33 6,960 cleaning units (2,900 PSI x 2.4 GPM) | 15 5,880 cleaning units (2,800 PSI x 2.1 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 2900 PSI | Champion 2800 PSI Low Profile | |
|---|---|---|
| Cleaning | ||
| Pressure | 2,900 PSI | 2,800 PSI |
| Flow | 2.4 GPM | 2.1 GPM |
| Cleaning units | 6,960 | 5,880 |
| Nozzles included | 4 | 5 |
| Detergent | Siphon tube | Onboard tank |
| Power | ||
| Power | Gas | Gas |
| Engine or motor | 170 cc (Simpson CT170) | 196 cc (Champion OHV) |
| Pump | Axial cam | Axial cam |
| CARB compliant | No | No |
| Build | ||
| Hose | 25 ft | 25 ft |
| Weight | 50 lb | 67.2 lb |
| Warranty | 1 year | 2 years |