Westinghouse WPX3400 Gas Pressure Washer Review: Worth It? (October 2026)
The Westinghouse WPX3400 review points to a gas washer for homeowners who want 3400 PSI, 2.6 GPM and five nozzle options for demanding outdoor cleanup. Its hose and onboard soap tank add reach and convenience, while gas engine care and careful nozzle choice are part of the deal.
On this page (9 sections)
- Who should buy the Westinghouse WPX3400?
- What do the WPX3400's pressure and flow tell you?
- Which jobs and surfaces suit this gas washer?
- How do the hose, nozzles and soap tank affect daily use?
- How should you set up and care for the WPX3400?
- How does the WPX3400 compare with the WPX3200?
- Should you choose the Simpson or DeWalt instead?
- What common mistakes should you avoid?
- Is the Westinghouse WPX3400 worth choosing?
The Westinghouse WPX3400 review is most useful for homeowners choosing a gas washer for driveways, decks, siding and other outdoor cleanup. The WPX3400 combines 3400 PSI and 2.6 GPM with five nozzle options, a 25 ft hose and an onboard soap tank.
Its output and gas engine suit bigger or recurring jobs better than light, occasional rinsing. If you want to avoid fuel, recoil starting and engine care, compare electric options in our electric pressure washer guide.
Who should buy the Westinghouse WPX3400?
Buy the WPX3400 if you expect to clean several kinds of outdoor surfaces and want a gas machine with strong stated flow. Its nozzle set and soap tank give you choices for different jobs, while the never-flat wheels help move it around a work area.
Westinghouse WPX3400 Gas: Best for recurring outdoor cleanup
- 3400 PSI
- 2.6 GPM
- 25 ft hose
- Five quick-connect nozzles
A gas washer with five nozzle options, an onboard soap tank and never-flat wheels. It suits homeowners who want one machine for several outdoor cleaning jobs.
Pros
- Highest stated flow among these four options
- Includes 0°, 15°, 25°, 40° and soap nozzles
- Onboard half-gallon soap tank
- Westinghouse provides 3-year limited service, labor and parts coverage
Cons
- Gas engine needs fuel and recoil starting
- The 0° nozzle can be too aggressive for many surfaces
- The 25 ft hose may require repositioning on larger areas
The machine has a 212 cc four-stroke Westinghouse OHV engine with recoil start and an axial cam pump. It includes engine oil, tools and a quick-start guide, so the setup still requires attention to the manual and the engine's fuel and oil needs.
This model is a poor fit if you want a quiet, low-maintenance washer for occasional light jobs, or if you cannot operate a gas engine outdoors. It is also not a shortcut around surface care: high pressure can damage paint, soft wood, mortar and other materials when the tip is too narrow or too close.
What do the WPX3400's pressure and flow tell you?
The WPX3400 is rated at 3400 PSI and 2.6 GPM. PSI describes pressure and GPM describes water flow; both help frame the machine's cleaning capacity, while nozzle choice and technique determine how that output reaches a surface.
| Model | Pressure | Flow | Hose | Nozzle set |
|---|---|---|---|---|
| Westinghouse WPX3400 Gas | 3400 PSI | 2.6 GPM | 25 ft | 0°, 15°, 25°, 40°, soap |
| Westinghouse WPX3200 Gas | 3200 PSI | 2.5 GPM | 25 ft | 0°, 15°, 25°, 40°, soap |
| DeWalt DXPW3300-S | 3300 PSI | 2.4 GPM | 25 ft | 0°, 15°, 25°, 40°, soap |
| Simpson Clean Machine 3400 | 3400 PSI | 2.5 GPM | 25 ft | 0°, 15°, 40°, soap |
The WPX3400 has the highest stated flow among these four choices, but that advantage matters most when your cleaning jobs need it. Read our explanation of pressure washer GPM vs PSI before deciding whether the extra flow suits your work.
Which jobs and surfaces suit this gas washer?
The WPX3400 is designed for outdoor jobs such as driveways, sidewalks, decks, siding, fences, garage floors, cars and patio furniture. Match your nozzle and distance to the surface rather than using the same setup for every task.
The 40° tip spreads the spray across a wider area, while narrower tips concentrate it more. Start with the widest suitable spray, keep the wand moving, and test an inconspicuous spot before cleaning a large area; avoid the 0° tip on surfaces that can be gouged or stripped.
For cars and patio furniture, stay back at first and avoid seams, seals, electrical parts and fragile finishes. Use detergent only when the task calls for it, and choose one labeled for pressure washers.
Driveways need steady, overlapping passes to reduce visible stripes. Our driveway cleaning guide explains how to prepare the area and work across concrete in a consistent pattern.
How do the hose, nozzles and soap tank affect daily use?
The 25 ft abrasion-resistant hose gives you room to move around a vehicle, patio or section of fence. On a large driveway or property, expect to reposition the washer rather than stretching or dragging the hose across obstacles.
The five quick-connect tips include 0°, 15°, 25° and 40° patterns, plus a soap nozzle. The onboard half-gallon soap tank is useful when detergent is appropriate; follow the washer instructions for drawing and flushing soap through the system.
The WPX3400 can work with accessories such as surface cleaners, undercarriage cleaners and foam cannons with M22 fittings. Check that an accessory's connection and flow requirements match before buying it.
How should you set up and care for the WPX3400?
Set up the WPX3400 outdoors on a stable surface, then follow its quick-start guide and manual for oil, fuel, water connection and starting. The engine uses recoil start, so allow room to reach the controls and keep exhaust away from doors, windows and enclosed spaces.
Before pulling the starter, connect the water supply and clear air from the hose and pump as directed in the manual. Never run a pressure washer without water flowing through it, and release pressure from the system before changing nozzles or disconnecting equipment.
After a job, turn the machine off and follow the manual's steps to shut down, relieve pressure and drain or flush the system as needed. Store fuel and the washer according to the manual, especially before freezing weather; our guide to starting a gas or electric pressure washer covers the basic start-up sequence.
How does the WPX3400 compare with the WPX3200?
The WPX3400 has 200 PSI and 0.1 GPM more stated output than the WPX3200. Both models share a 25 ft hose, five nozzle options, a half-gallon soap tank and never-flat wheels.
Westinghouse WPX3200 Gas: Best for moderate driveway jobs
- 3200 PSI
- 2.5 GPM
- 25 ft hose
- Five quick-connect nozzles
A Westinghouse option with slightly lower stated pressure and flow than the WPX3400. It has five nozzle options and a half-gallon onboard soap tank.
Pros
- Same 25 ft hose length
- Five nozzle options including soap
- Westinghouse provides 3-year limited service, labor and parts coverage
Cons
- Lower stated pressure and flow than the WPX3400
- Still requires gas-engine setup and care
Choose the WPX3200 if its 3200 PSI and 2.5 GPM ratings meet your needs and you want a similar Westinghouse setup. Pick the WPX3400 when you specifically want its higher stated flow for repeated or larger cleaning jobs.
Should you choose the Simpson or DeWalt instead?
The Simpson Clean Machine 3400 matches the WPX3400's pressure rating but has a lower 2.5 GPM flow rating. It has a 208 cc CRX engine with low-oil shutdown, four quick-connect nozzles, and a 25 ft hose; it is 49-state compliant and not for sale in California.
Simpson Clean Machine 3400: Best for low-oil shutdown
- 3400 PSI
- 2.5 GPM
- 25 ft hose
- Four quick-connect nozzles
A 3400 PSI option with a 208 cc CRX engine that includes low-oil shutdown. Its four-nozzle set skips the 25° tip found on the WPX3400.
Pros
- Low-oil shutdown
- 25 ft abrasion-resistant hose
- Pneumatic tires
Cons
- Lower stated flow than the WPX3400
- 49-state compliant and not for sale in California
- Warranty terms differ by engine, pump and frame
The DeWalt DXPW3300-S is rated at 3300 PSI and 2.4 GPM, with five nozzles and a 25 ft hose. Its stated warranty coverage is split by part: 5 years for the frame, 3 years for the pump and 2 years for the engine.
DeWalt DXPW3300-S: Best for separated warranty coverage
- 3300 PSI
- 2.4 GPM
- 25 ft hose
- Five quick-connect nozzles
A residential gas washer with five nozzle options and a 25 ft hose. DeWalt lists a 5-year frame, 3-year pump and 2-year engine warranty.
Pros
- Five nozzle options
- 10 in pneumatic tires
- DeWalt lists separate frame, pump and engine warranty terms
Cons
- Lower stated pressure and flow than the WPX3400
- 49-state compliant
Choose Simpson if low-oil shutdown is a priority and its location limits work for you. Consider DeWalt if its separate warranty terms matter more than the WPX3400's higher stated flow; check the current warranty terms and local availability before buying.
What common mistakes should you avoid?
The most costly mistake is treating the pressure rating as a safe setting for every surface. A narrow spray at close range can cut wood, remove paint or damage mortar, so start wide, stand back and make a small test pass.
Don't point the spray at people, pets, windows, electrical equipment or loose materials. Clear the work area, wear suitable eye protection and follow the washer manual's safety directions.
Avoid running the engine in an enclosed space or letting the machine run without water. Also avoid forcing the hose to reach; move the washer to keep a comfortable working path and prevent snags.
Is the Westinghouse WPX3400 worth choosing?
In this Westinghouse WPX3400 review, the decision is straightforward: choose it if you want a gas washer with 2.6 GPM flow, five nozzles and an onboard soap tank for recurring outdoor cleanup. Choose the WPX3200 if its slightly lower output is enough, Simpson if low-oil shutdown is a priority, or DeWalt if its warranty breakdown better fits your needs.
Skip the WPX3400 if your jobs are mostly light rinsing, you prefer electric operation or you do not want fuel and engine care. For more gas-powered alternatives, compare our best gas pressure washers for homeowners.
Frequently asked questions
Is the Westinghouse WPX3400 good for driveways?
Yes, the WPX3400 can suit driveway cleaning if you use an appropriate nozzle or compatible surface cleaner and keep the spray moving. Its output is substantial, so test an inconspicuous spot first and follow the surface cleaner and washer instructions.
What nozzles come with the Westinghouse WPX3400?
The WPX3400 includes 0°, 15°, 25° and 40° spray nozzles plus a soap nozzle. Begin with a wider spray on a small test area, since narrow tips focus force and can damage paint, soft wood, mortar or other delicate materials.
Does the Westinghouse WPX3400 have a soap tank?
Yes. The WPX3400 has a half-gallon onboard soap tank for compatible cleaning tasks.
Use detergent approved for pressure washers and follow its dilution directions.
Check the washer manual for how to apply soap and flush the system afterward.
What is the difference between the WPX3400 and WPX3200?
The WPX3400 is rated at 3400 PSI and 2.6 GPM, compared with 3200 PSI and 2.5 GPM for the WPX3200. Both have a 25 ft hose, five quick-connect nozzles and a half-gallon onboard soap tank, so choose based on the output your jobs call for.
