Simpson PowerShot 4400 PSI
#1 in GasFull review
The best value contractor washer here: 4400 PSI at 4 GPM with pro pump coverage for less than the Honda powered models. Too much machine for occasional home use.
Amazon $899.99$899.99
The Simpson PowerShot 4400 PSI is the better pressure washer overall, rated 4.1 to 3.8. The Simpson PowerShot 4400 PSI leads on cleaning power. The Westinghouse WPX3600 costs $370.99 less ($529 vs $899.99).
Westinghouse WPX3600
#6 in GasFull review
For homeowners who want a longer lasting triplex pump and longer hose without paying Honda engine prices.
Amazon $529$529
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 4400 PSI for cleaning power (17,600 cleaning units (4,400 PSI x 4 GPM) vs 9,720 cleaning units (3,600 PSI x 2.7 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 4400 PSI | Westinghouse WPX3600 |
|---|---|---|
| Overall rating | 4.1/5 | 3.8/5 |
| Value 35% | 60 $51.14 per 1,000 cleaning units ($899.99, 17,600) | 53 $54.42 per 1,000 cleaning units ($529, 9,720) |
| Cleaning power 30% | 100 17,600 cleaning units (4,400 PSI x 4 GPM) | 79 9,720 cleaning units (3,600 PSI x 2.7 GPM) |
| Hose 10% | 100 50 ft hose | 100 35 ft hose |
| Warranty 25% | 50 3-year warranty | 50 3-year warranty |
Specifications
| Simpson PowerShot 4400 PSI | Westinghouse WPX3600 | |
|---|---|---|
| Cleaning | ||
| Pressure | 4,400 PSI | 3,600 PSI |
| Flow | 4 GPM | 2.7 GPM |
| Cleaning units | 17,600 | 9,720 |
| Nozzles included | 5 | 5 |
| Detergent | - | Onboard tank |
| Power | ||
| Power | Gas | Gas |
| Engine or motor | 420 cc (CRX 420) | 212 cc (Westinghouse OHV) |
| Pump | Triplex plunger | Triplex plunger |
| CARB compliant | No | No |
| Build | ||
| Hose | 50 ft | 35 ft |
| Weight | 107 lb | 79 lb |
| Warranty | 3 years | 3 years |