Westinghouse WPX3800
#3 in GasFull review
For big properties and frequent users who want near contractor flow for less than a Honda powered Simpson.
Amazon $737.63$737.63
The Westinghouse WPX3800 is the better pressure washer overall, rated 4.0 to 3.2. The Westinghouse WPX3800 leads on value and cleaning power. The Simpson Aluminum 3600 PSI costs $35.64 less ($701.99 vs $737.63).
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 Westinghouse WPX3800 for value ($53.92 per 1,000 cleaning units ($737.63, 13,680) vs $78 per 1,000 cleaning units ($701.99, 9,000)) and cleaning power (13,680 cleaning units (3,800 PSI x 3.6 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 | Westinghouse WPX3800 | Simpson Aluminum 3600 PSI |
|---|---|---|
| Overall rating | 4.0/5 | 3.2/5 |
| Value 35% | 54 $53.92 per 1,000 cleaning units ($737.63, 13,680) | 15 $78 per 1,000 cleaning units ($701.99, 9,000) |
| Cleaning power 30% | 100 13,680 cleaning units (3,800 PSI x 3.6 GPM) | 67 9,000 cleaning units (3,600 PSI x 2.5 GPM) |
| Hose 10% | 100 35 ft hose | 100 35 ft hose |
| Warranty 25% | 50 3-year warranty | 50 3-year warranty |
Specifications
| Westinghouse WPX3800 | Simpson Aluminum 3600 PSI | |
|---|---|---|
| Cleaning | ||
| Pressure | 3,800 PSI | 3,600 PSI |
| Flow | 3.6 GPM | 2.5 GPM |
| Cleaning units | 13,680 | 9,000 |
| Nozzles included | 5 | 5 |
| Detergent | Onboard tank | - |
| Power | ||
| Power | Gas | Gas |
| Engine or motor | 274 cc (Westinghouse OHV) | 196 cc (Honda GX200) |
| Pump | Triplex plunger | Triplex plunger |
| CARB compliant | No | No |
| Build | ||
| Hose | 35 ft | 35 ft |
| Weight | 91 lb | 78 lb |
| Warranty | 3 years | 3 years |