Westinghouse WPX4400 Gas Pressure Washer, 4400 PSI and 4.2 GPM, Spray Gun and Wand, 5 Nozzle Set, for Cars/Fences/Driveways/Homes/Patios/Furniture

The Westinghouse WPX4400 is a gas powered pressure washer designed for heavy outdoor cleaning tasks like washing driveways, garage floors, exterior walls, siding, decks, fences, railings, cars, and patio furniture. Built around a heavy duty 420cc 4-stroke Westinghouse OHV engine, it delivers up to 4400 PSI of water pressure and a flow rate of 4.2 gallons per minute. This high pressure output makes it suitable for homeowners and commercial users who need to clear tough grime across large surface areas quickly.

At the heart of the machine is a commercial grade triplex brass head pump paired with a horizontal shaft engine that starts using a traditional recoil pull mechanism. To keep you working longer without stopping, the unit features an easy to fill 1.7 gallon gas tank. The water output is delivered through a 50 foot abrasion resistant Super-Flex hose connected to a lightweight spray gun. Included with the unit are five quick connect nozzles, spanning 0, 15, 25, 40 degrees, plus a dedicated soap nozzle for applying detergents.

Mobility and accessory support are key elements of the design. The unit is built on a tough steel frame equipped with 12 inch high profile pneumatic tires that roll over uneven ground. Its spray gun and wand use standard M22 fittings, making it compatible with aftermarket pressure washing tools such as foam cannons, surface cleaners, and undercarriage attachments. Westinghouse includes engine oil, setup tools, and a quick start guide in the box so assembly and initial preparation can be completed in minutes.

There are a few practical considerations to keep in mind before purchase. Because this machine uses a 420cc gas engine with recoil start, it requires manual pull starting and ongoing gas engine oil upkeep. In addition, every unit undergoes functional factory testing prior to shipping, so you may notice a slight fuel odor or minor residual oil upon unpacking. Westinghouse backs the pressure washer with a 3 year limited warranty covering service, labor, and parts.

Verdict: The Westinghouse WPX4400 is a robust option for anyone managing demanding outdoor cleaning projects on property, vehicles, or structures. With 4400 PSI of pressure, a durable triplex pump, and standard M22 attachment compatibility, it offers serious power and flexibility. It is best suited for buyers who want high water flow and heavy duty cleaning performance backed by a three year warranty.

• Water Pressure: 4400 PSI
• Flow Rate: 4.2 GPM
• Engine: 420cc 4-Stroke Westinghouse OHV with recoil start
• Pump Type: Triplex brass head pump
• Fuel Tank Capacity: 1.7 gallons
• Hose Length: 50 feet (Super-Flex)
• Tires: 12 inch high profile pneumatic tires
• Fitting Type: M22 fittings
• Warranty: 3 year limited (service, labor, parts)

A great fit if you:

• Need high water output (4400 PSI and 4.2 GPM) for large areas like driveways, siding, and garage floors.
• Plan to use attachments like surface cleaners, foam cannons, or undercarriage sprayers with standard M22 fittings.
• Want a mobile, steel framed pressure washer with 12 inch pneumatic tires for moving across rough ground.

Consider something else if you:

• Prefer an electric pressure washer that does not require gas engine oil maintenance or recoil pull starting.
• Only need light cleaning power for small items and prefer a smaller unit with a shorter hose.

What accessories come in the box?
The package includes a 50 foot Super-Flex hose, a lightweight spray gun and wand, five quick connect nozzles (0°, 15°, 25°, 40°, and Soap), engine oil, assembly tools, and a quick start guide.

What type of pump and engine does this pressure washer use?
It features a 420cc 4-stroke Westinghouse OHV horizontal shaft engine with recoil start paired with a commercial grade triplex brass head pump.

Can I use standard pressure washer attachments with this unit?
Yes, the spray setup uses standard M22 fittings, making it compatible with accessories such as surface cleaners, undercarriage cleaners, and foam cannons.

Why is there a fuel odor when opening the box?
All Westinghouse pressure washers undergo functional testing at the factory before shipping, which may leave a small amount of residual oil or fuel odor in the unit.