You’ve seen gas pressure washers before, but not like this. The Westinghouse WPX3400 packs a solid punch—3,400 PSI at 2.6 GPM—driven by a 212 cc OHV Westinghouse engine paired with a maintenance‑free axial cam pump. It rolls in on never‑flat 12″ wheels, armed with five quick‑connect nozzles and a built‑in soap tank. No assembly headaches, no guesswork—just grab, pull, and go.
Whether you’re restoring dingy concrete, blasting grime off siding, or sprucing up patio furniture, this unit wants to handle it. But does it deliver, without turning into mowing duty for your wallet or your back? Let’s hit the throttle and see what this machine really does.
Our Top Pick
Engine & Starting
Flip the fuel switch, half‑prime, and one pull wakes it. No wrestling. A Redditor confirms that it “starts on first pull and plenty of power… fired up after a couple of pulls even after years unused.”
It idles smooth, doesn’t shake your bones off. Rev it under load and you feel the muscle, but noise and vibration stay in check for a gas motor.
Real‑World Performance
Driveways & Sidewalks
Blast mode with the 0° tip makes dirt surrender instantly. Felt like erasing a chalk board.
Decks & Siding
Use the 25° tip with soap—two rounds removes grime without gouging wood.
Cars & Furniture
A gentle 40° rinse plus soap cleans without stripping wax. My patio set looked brand‑new.
Owners praise the flow: “runs a 15‑inch surface cleaner perfect… knocked out what used to be a 2‑day job in a few hours.” That means this thing isn’t just for light scrubbing—it moves.
Pump & Nozzle Experience
The axial‑cam pump lives up to its no‑maintenance claim—no oil drips, no weird noises.
Switching nozzles is fast. From blasting to gentle rinse, it handles quick shifts. The brass valves and pressure relief valve add reliability—no flimsy parts to clog or crack.
Long‑term owners suggest keeping the hose away from the muffler to prevent wear. A low‑cost replacement hose solves the issue.
Mobility & Ergonomics
At 63 pounds, it’s sturdy but not a monster. The frame handle gives good leverage; lift, tilt and roll. Maybe a bit heavy for one‑hand carry, but rolling’s easy.
The spray gun feels solid in hand. The lance reaches gutter lines or car roofs easily. Hose flex stays smooth even in cold weather.
Maintenance & Reliability
Keep it simple: change engine oil, clean or replace the air filter, check the spark plug and monitor pump oil periodically. The pump doesn’t need tune‑ups unless you’re doing pro‑level use. For cold storage, add antifreeze fluid to prevent freeze damage.
Warranty coverage is solid: 3 years for home use. Westinghouse offers lifetime tech support—no hot‑line‑hell here.
Competing Models & Value
Westinghouse offers a 3800 PSI model with slightly more power for a higher price. The electric variant lacks engine noise but gives up some punch.
Compared to other brands: Simpson’s similar model is pricier and lacks a soap tank; Generac’s is costlier but has a comfier gun; Predator offers more flow at the same price.
Forums note that accessories for over‑3,200 PSI gear hike the total cost. Yet the added flow speeds up big jobs.
Westinghouse WPX3400 Gas Pressure Washer
High-pressure gas washer with powerful engine, soap tank, and sturdy wheels—built to tackle tough messes effortlessly.
Conclusion
The Westinghouse WPX3400 is a scrubbing beast. One‑pull start, maintenance‑free pump, strong flow, soap tank, rugged build, long warranty. If you’re ready to work hard, it delivers real value.
If you prefer whisper‑quiet or lightweight gear, go electric. After that, top‑tier commercial models offer easier repair paths. For most homeowners, though, this hits the sweet spot: power, reliability, and flexibility—without stabbing your wallet.
Frequently Asked Questions (FAQs)
What type of fuel should I use?
Use regular unleaded gas with no more than 10% ethanol. High-ethanol blends can harm the engine over time.
How do I start the machine correctly?
Switch the fuel on, half-prime the engine, and give the pull cord one firm tug—it fires up smoothly, even after long periods unused.
Can I adjust the water pressure?
No dedicated dial to dial it down. You change the spray tip or use the built-in soap tip to manage flow.
Is the pump sealed, or does it need oil changes?
The axial-cam pump is sealed. No need to add or change oil unless performing deep maintenance.
Does it have low oil auto-shutdown?
No—it doesn’t. You need to monitor engine oil manually.
Why is my pressure lower than rated?
Clogged nozzles, worn seals, or an unloader valve issue are common causes—check and clean them first.
How do I prevent hose damage from heat?
Zip-tie the hose away from the muffler or use an angled connector to avoid contact with heat.
What maintenance does it need?
Regularly change engine oil, clean or replace the spark plug and air filter. Stabilize fuel before offseason storage, and winterize the pump to avoid freeze damage.
Where do I find parts or service?
Westinghouse offers tech support via their hotline. Replacement hoses and valves are available through parts suppliers and secondhand marketplaces.
