Simpson PowerShot 4000 PSI
#4 in GasFull review
A contractor grade washer for people who clean large areas often. Its flow and hose make big jobs much quicker than a homeowner unit.
Amazon $829.94$829.94
The Simpson PowerShot 4000 PSI is the better pressure washer overall, rated 3.9 to 3.2. The Simpson PowerShot 4000 PSI leads on value and cleaning power. The Simpson Aluminum 3600 PSI costs $127.95 less ($701.99 vs $829.94).
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
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 PowerShot 4000 PSI for value ($59.28 per 1,000 cleaning units ($829.94, 14,000) vs $78 per 1,000 cleaning units ($701.99, 9,000)) and cleaning power (14,000 cleaning units (4,000 PSI x 3.5 GPM) vs 9,000 cleaning units (3,600 PSI x 2.5 GPM)).
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 PowerShot 4000 PSI | Simpson Aluminum 3600 PSI |
|---|---|---|
| Overall rating | 3.9/5 | 3.2/5 |
| Value 35% | 44 $59.28 per 1,000 cleaning units ($829.94, 14,000) | 15 $78 per 1,000 cleaning units ($701.99, 9,000) |
| Cleaning power 30% | 100 14,000 cleaning units (4,000 PSI x 3.5 GPM) | 67 9,000 cleaning units (3,600 PSI x 2.5 GPM) |
| Hose 10% | 100 50 ft hose | 100 35 ft hose |
| Warranty 25% | 50 3-year warranty | 50 3-year warranty |
Specifications
| Simpson PowerShot 4000 PSI | Simpson Aluminum 3600 PSI | |
|---|---|---|
| Cleaning | ||
| Pressure | 4,000 PSI | 3,600 PSI |
| Flow | 3.5 GPM | 2.5 GPM |
| Cleaning units | 14,000 | 9,000 |
| Nozzles included | 5 | 5 |
| Power | ||
| Power | Gas | Gas |
| Engine or motor | 270 cc (Honda GX270) | 196 cc (Honda GX200) |
| Pump | Triplex plunger | Triplex plunger |
| CARB compliant | No | No |
| Build | ||
| Hose | 50 ft | 35 ft |
| Weight | 120 lb | 78 lb |
| Warranty | 3 years | 3 years |