The 5 Best Gas Pressure Washers
A gas washer makes sense when the hose must cross a large driveway or several decks and a nearby outlet is not available. The headline PSI tells you about force; GPM tells you how much water can carry dirt away. I would compare both, plus pump type, storage weight and how often you will actually start and maintain a gasoline engine.
Westinghouse WPX3400 is the homeowner's high-flow starting point. SIMPSON's Clean Machine is another 3400-PSI option, while PowerShot is the pricier triplex-pump route for heavier work. The lower-priced Ezasin needs closer scrutiny of its support and exact package. For routine car rinsing, the electric-washer guide is a better fit than any of these gas machines.
Our top 5 gas pressure washers
Swipe to compare price, rating and best use →
| Product | Price | Rating | Best for |
|---|---|---|---|
01 Westinghouse WPX3400Details ↓ | $349.00 | 4.5/5Amazon | Best large-property homeowner pick |
02 SIMPSON Clean Machine 3400Details ↓ | $359.00 | 4.3/5Amazon | Best homeowner gas alternative |
03 SIMPSON PowerShot PS3228Details ↓ | $659.00 | 4.3/5Amazon | Best frequent-work pump |
04 DeWalt 3300 Gas WasherDetails ↓ | $429.00 | 4.2/5Amazon | Best DeWalt comparison |
05 Ezasin Gas Pressure WasherDetails ↓ | $256.49 | 4.4/5Amazon | Best lower-price gas entry |
01 — Westinghouse
Best large-property homeowner pickWestinghouse WPX3400
WPX3400 is where I would start for a homeowner cleaning a long drive, stone paths and fencing in one session. Westinghouse specifies 3400 PSI and 2.6 GPM, a more useful pairing than pressure alone. Its gas engine and wheeled frame let you work away from outlets, while fuel, oil, winter storage and a large footprint become part of ownership.
It leads for substantial periodic work without jumping straight to contractor pricing. I would pick the SIMPSON PowerShot for frequent paid cleaning and its triplex-pump case. For a small patio or a vehicle, WPX3400 is more noise and pressure than the job calls for.
Specifications: Westinghouse WPX3400 product information ↗
View on Amazon ↗Homeowners cleaning extensive hard surfaces.
You mainly wash a car or tiny patio.
What I like
+Stated 3400-PSI, 2.6-GPM pairing.
What to weigh
−Engine upkeep, noise and storage space.
02 — SIMPSON
Best homeowner gas alternativeSIMPSON Clean Machine 3400
Clean Machine is a second gas route for someone who prefers SIMPSON's frame, hose and service network. The 3400-PSI class puts it in the same large-surface conversation as WPX3400, but compare actual flow and pump construction on this exact version rather than reading matching PSI as equivalent cleaning speed. Leave room to roll and store the unit.
Second place is about an alternative ownership package, not a claim that it out-cleans Westinghouse. I would choose it if the current hose, parts access and price fit better. PowerShot earns the next place for the buyer who really benefits from a more service-oriented pump.
Specifications: Exact Amazon product listing ↗
View on Amazon ↗Homeowners comparing gas-washer parts access.
You need a lighter electric appliance.
What I like
+Relevant 3400-PSI-class alternative.
What to weigh
−Flow and pump configuration vary by model.
03 — SIMPSON
Best frequent-work pumpSIMPSON PowerShot PS3228
PowerShot PS3228 is the choice for repeated heavy cleaning rather than an occasional porch rinse. SIMPSON specifies a Honda GX200 engine, AAA triplex pump, 3300 PSI and 2.5 GPM, plus five nozzle tips. That service-oriented build brings a much higher purchase price and more machinery to maintain.
I place it third because most households will not recover that extra cost. A contractor or a property owner washing large surfaces regularly may. Check the exact regional model and support terms; the maker notes the listed 49-state version is not sold in California.
Specifications: SIMPSON PowerShot PS3228 specifications ↗
View on Amazon ↗Frequent heavy work where pump service matters.
You wash only a driveway twice a year.
What I like
+Documented triplex pump and engine pairing.
What to weigh
−Cost, weight and maintenance burden.
04 — DEWALT
Best DeWalt comparisonDeWalt 3300 Gas Washer
The DeWalt 3300 belongs on the shortlist for a buyer who already values DeWalt's dealer or service path. It is a wheeled gas washer for hard outdoor surfaces, but the 3300-PSI label should be read alongside the exact model's flow, engine and pump specifications. Check those details and the supplied tips before treating it as interchangeable with PowerShot.
Fourth place reflects a less clearly differentiated package at its current price. I would choose it if local parts support or a verified bundle gives it an advantage. If the pump and hose are similar, Westinghouse offers a clearer homeowner value case; PowerShot has the clearer heavy-use case.
Specifications: Exact Amazon product listing ↗
View on Amazon ↗Buyers with a useful DeWalt service option.
You choose purely by the PSI badge.
What I like
+Familiar gas-washer format for hard surfaces.
What to weigh
−Exact pump and flow must be confirmed.
05 — Ezasin
Best lower-price gas entryEzasin Gas Pressure Washer
Ezasin is the inexpensive way into a gas washer in this set. The listing states a 212cc engine, 3500-PSI maximum and 2.3-GPM flow; that combination is worth comparing on a large driveway, but I would verify rated figures, included hose and replacement-parts access before buying. A high maximum pressure number does not compensate for a short-lived pump.
It closes the ranking because the lower price comes with less established manufacturer documentation than Westinghouse or SIMPSON. I would choose it only after confirming the exact engine and support path. For infrequent cleaning near an outlet, an electric model avoids much of the fuel routine.
Specifications: Exact Amazon product listing ↗
View on Amazon ↗Cost-sensitive buyers needing gas reach.
You expect documented long-term pump support.
What I like
+Lower current price with stated gas output.
What to weigh
−Service and rated-output evidence is thinner.
Price information
Amazon price and availability checked Oct 17, 2026, 10:17 PM Lisbon time. Prices and availability are subject to change; the information shown on Amazon.com at purchase applies.
Our process
How we picked.
We compare five relevant products for different needs, using documented specifications, clear use cases and practical trade-offs. Our goal is to make the differences clear and help you choose with confidence.
- 01Relevance
Each product must fit the guide’s intended use, audience and requirements.
- 02Specifications
We compare the key product details that meaningfully affect the buying decision.
- 03Use case and fit
We compare the intended use, configuration and practical fit of every selected product.
- 04Strengths and limitations
We explain where each option performs best and the compromises to consider.
Good questions
FAQ — Gas Pressure Washers
01Is a higher PSI number always better?+
No. Compare working pressure and flow, then use a suitable tip and distance for each surface. A narrow jet can damage paint, soft wood or mortar.
02What does a triplex pump change?+
It can be designed for heavier-duty use and service than a basic homeowner pump, but maintenance, engine condition and parts availability still determine practical value.
The short answer
Start with the Westinghouse WPX3400.
I recommend it for homeowners cleaning extensive hard surfaces. Choose something else if you mainly wash a car or tiny patio.
View on Amazon ↗Keep looking
Related guides
The 5 Best Air Purifiers for Homes with Pets
Five air purifiers for pet homes, including LEVOIT Vital 200S-P and WINIX 5510, compared by hair pre-filter, smoke CADR, filter maintenance, noise.
The 5 Best Air Purifiers to Use After Mold Cleanup
Five Levoit, Coway, Winix and GermGuardian purifiers sized for rooms after the moisture source is fixed.
The 5 Best Pet Hair Robot Vacuums
Five pet-hair robot vacuums from Shark, VONKO and Tikom for self-emptying, mapped routes and light mopping.