Westinghouse WPX3400
#5 in GasFull review
A strong value for homeowners who clean driveways, siding and decks a few times a year, backed by a longer warranty than most rivals at this price.
Amazon $349$349
The Westinghouse WPX3400 is the better pressure washer overall, rated 3.8 to 2.7. The Westinghouse WPX3400 leads on value. The Westinghouse WPX3400 costs $483.90 less ($349 vs $832.90).
Simpson Aluminum 3400 PSI
#19 in GasFull review
For contractors who want a CAT pump and a rustproof frame on a light 2.5 GPM machine. Homeowners get the same cleaning power for far less elsewhere.
Amazon $832.90$832.90
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 WPX3400 for value ($39.48 per 1,000 cleaning units ($349, 8,840) vs $97.99 per 1,000 cleaning units ($832.90, 8,500)).
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 WPX3400 | Simpson Aluminum 3400 PSI |
|---|---|---|
| Overall rating | 3.8/5 | 2.7/5 |
| Value 35% | 87 $39.48 per 1,000 cleaning units ($349, 8,840) | 0 $97.99 per 1,000 cleaning units ($832.90, 8,500) |
| Cleaning power 30% | 64 8,840 cleaning units (3,400 PSI x 2.6 GPM) | 58 8,500 cleaning units (3,400 PSI x 2.5 GPM) |
| Hose 10% | 33 25 ft hose | 33 25 ft hose |
| Warranty 25% | 50 3-year warranty | 50 3-year warranty |
Specifications
| Westinghouse WPX3400 | Simpson Aluminum 3400 PSI | |
|---|---|---|
| Cleaning | ||
| Pressure | 3,400 PSI | 3,400 PSI |
| Flow | 2.6 GPM | 2.5 GPM |
| Cleaning units | 8,840 | 8,500 |
| Nozzles included | 5 | 5 |
| Detergent | Onboard tank | - |
| Power | ||
| Power | Gas | Gas |
| Engine or motor | 212 cc (Westinghouse OHV) | 196 cc (Honda GX200) |
| Pump | Axial cam | Triplex plunger |
| CARB compliant | No | No |
| Build | ||
| Hose | 25 ft | 25 ft |
| Weight | 63 lb | 81 lb |
| Warranty | 3 years | 3 years |