Westinghouse WPX3400 Gas Pressure Washer, 3400 PSI and 2.6 GPM, Onboard Soap Tank, Spray Gun and Wand, 5 Nozzle Set, for Cars/Fences/Driveways/Homes/Patios/Furniture

The Westinghouse WPX3400 is a gas powered pressure washer engineered for heavy outdoor cleaning tasks around residential properties. Designed with a 212cc 4-stroke Westinghouse OHV horizontal shaft engine, this unit delivers high-pressure water streams to strip away dirt, grime, and debris from hard outdoor surfaces. It suits homeowners who need strong cleaning capability for driveways, garage floors, sidewalks, exterior walls, decks, fences, railings, cars, and patio furniture.

Performance relies on a combination of 3400 PSI maximum pressure and a flow rate of 2.6 gallons per minute. The system utilizes a maintenance-free axial cam pump, eliminating the need for regular pump oil changes while providing continuous water and soap delivery. Fuel is supplied by an easy-to-fill 1-gallon gas tank, allowing extended operational sessions between refills. For detergent applications, an onboard half-gallon soap tank feeds cleaning solutions directly into the water stream.

User control and maneuverability are built directly into the hardware setup. A 25-foot abrasion-resistant Super-Flex hose attaches to a lightweight high-pressure spray gun and wand. The unit includes five quick-connect nozzles with spray angles of 0°, 15°, 25°, 40°, plus a dedicated soap nozzle for applying detergents. Standard M22 fittings ensure compatibility with extra accessories such as surface cleaners, undercarriage sprayers, and foam cannons. The entire assembly sits on a tough steel frame equipped with 12-inch high-profile, never-flat wheels for moving across rough yard terrain.

As a gas-powered machine, it relies on a manual recoil start system and requires standard engine fuel management. Buyers should note that every unit undergoes functional factory testing prior to packaging, which means the machine may arrive with minimal residual oil or a mild fuel odor inside the box. Additionally, users must manage routine engine oil levels using the included oil and tools.

Verdict: This pressure washer is ideal for homeowners who need serious cleaning output for large exterior surfaces, decks, and driveways. Its strong 3400 PSI rating, maintenance-free pump, integrated soap tank, and broad nozzle selection make it a reliable choice for heavy-duty property maintenance.

• Engine Type: 212cc 4-stroke Westinghouse OHV horizontal shaft engine
• Starting Method: Recoil start
• Pressure Rating: 3400 PSI
• Flow Rate: 2.6 GPM
• Pump Type: Maintenance-free axial cam pump
• Gas Tank Capacity: 1 gallon
• Soap Tank Capacity: 0.5 gallon (half gallon) onboard tank
• Hose Length & Type: 25-foot abrasion-resistant Super-Flex hose
• Included Nozzles: 5 quick-connect nozzles (0°, 15°, 25°, 40°, Soap)
• Fittings: Standard M22 accessory compatible
• Wheels: 12-inch high-profile, never-flat wheels
• Frame Construction: Steel frame
• Included Accessories: Spray gun, wand, engine oil, assembly tools, quick start guide
• Warranty: 3-year limited manufacturer service, labor, and parts coverage

A great fit if you:

• Need high water pressure up to 3400 PSI to clean stubborn buildup from decks, driveways, sidewalks, and garage floors.
• Want an integrated half-gallon soap tank to apply detergent directly without handling extra foam attachments.
• Require standard M22 fitting compatibility to connect surface cleaners, undercarriage sprayers, or foam cannons.
• Value a heavy-duty steel frame with large 12-inch never-flat wheels for rolling over uneven lawn terrain.

Consider something else if you:

• Prefer an electric pressure washer that plugs into an outlet without needing gasoline or manual recoil pull starts.
• Only require light-duty cleaning where lower water pressure and smaller equipment would be sufficient.

Confirm on the listing:

• Verify the connection types on your existing pressure washer accessories to ensure they match the unit M22 fittings.
• Check the physical storage dimensions of the steel frame unit to ensure adequate space in your garage or storage shed.
• Review the included contents list to confirm engine oil, assembly tools, wand, spray gun, and quick start guide are included.

How to compare your options: When evaluating gas pressure washers, compare the peak pressure rating in PSI and water flow in GPM against the outdoor surfaces you plan to wash. Pay close attention to functional components like pump maintenance requirements, detergent tank capacity, and nozzle variety. Frame construction, wheel height, hose flexibility, and manufacturer warranty coverage are also essential factors when deciding between models for routine property maintenance.

Unpack the unit and review the quick start guide before filling the engine with fuel or attempting initial startup.

Add the included engine oil using the provided tools according to the manual instructions before starting the 212cc 4-stroke engine for the first time.

Select the appropriate quick-connect nozzle for your surface, reserving narrow angles like 0° or 15° for tough concrete and wider angles like 40° for lighter washing.

Flush the onboard half-gallon detergent tank and hose with fresh water after applying soap to prevent detergent residue from settling inside the system.

What accessories work with this pressure washer spray gun?
The included spray gun and wand feature standard M22 fittings, allowing compatibility with pressure washer accessories like surface cleaners, undercarriage cleaners, and foam cannons.

Does the axial cam pump require regular oil changes?
No, the unit features a maintenance-free axial cam pump design that does not require regular fluid maintenance.

Why does the product listing mention possible fuel or oil smells?
All units undergo functional testing at the factory prior to shipment, which can leave minimal residual oil or a mild fuel odor in the box upon opening.

What comes inside the package?
The box includes the gas pressure washer unit, spray gun, wand, 25-foot Super-Flex hose, 5 quick-connect spray nozzles, engine oil, assembly tools, and a quick start guide.

What is covered under the manufacturer warranty?
Westinghouse provides a 3-year limited warranty that covers service, labor, and parts.