6 Best Simpson Pressure Washers in 2026: Ranked for Power, Value, and Real-World Use

If you want a gas pressure washer that lasts, Simpson shows up on every short list. The brand has been building professional-grade units for over 50 years, and their lineup runs from solid homeowner models all the way to contractor-ready machines that can handle commercial workloads.

Recommendation	Product	Reason
Best Overall	Simpson PS3228-S	Honda GX200 + AAA triplex pump at a price that makes sense Reviews ↓
Best Budget	Simpson CM61456-S	Clean Machine with turbo nozzle and soap tank under $360 Reviews ↓
Best Mid-Range	Simpson CM61083	3400 PSI CRX engine, fully assembled out of the box Reviews ↓
Best Aluminum Frame	Simpson ALH3425	Aircraft-grade aluminum frame, Honda GX200, built for pros on the move Reviews ↓
Best High-Powered	Simpson PS60843	4400 PSI with CRX 420cc, contractor-grade muscle Reviews ↓
Best Professional	Simpson PS4240H-SP	Honda GX390 + 4.0 GPM = the most cleaning power on this list Reviews ↓

Best Overall: Simpson PS3228-S PowerShot

The PS3228-S is the sweet spot in Simpson’s lineup. It pairs a Honda GX200 commercial engine with an AAA industrial triplex pump, and delivers 3300 PSI at 2.5 GPM. That combination puts it ahead of most residential-grade machines without jumping into full commercial pricing.

Pros and Cons

Pros	Cons
Honda GX200 engine is genuinely commercial grade	Pull-start only, no electric start
AAA triplex pump with thermal relief and integrated unloader
5 quick-connect nozzles including 0 degree tip
Compact welded steel frame, easy to store
8250 cleaning units, plenty for driveways, decks, siding

Testing Results

The PS3228-S handles everything a homeowner throws at it. Concrete driveways: yes, including deep oil stains with the 0 degree tip. Siding: yes, use the 40 degree and keep your distance. Deck prep before staining: yes, this is one of the strongest use cases. Car washing: yes, but stick to the 40 degree nozzle.

The Honda GX200 starts on the first or second pull most of the time. Fuel tank holds about 0.8 gallon, which runs roughly an hour of continuous use. For a normal driveway or deck job, you won’t need a refill.

Real-World Usage

This machine is compact enough to load solo into a truck bed. The steel frame is built for rough handling, not careful garage storage. The 10-inch pneumatic tires roll over most surfaces without fighting you.

The AAA triplex pump is a genuine upgrade from axial cam pumps. It runs cooler, lasts longer, and holds up to extended use. If you’re running this for hours at a job site, that matters.

Best Use Case

This is the pick for homeowners who want commercial-grade parts without commercial pricing, and for prosumers who use a pressure washer heavily but don’t need 4000+ PSI. Deck cleaning, concrete, siding, paint prep. It does all of it well.

Verdict

The PS3228-S is the best all-around Simpson you can buy if you want a long-term machine without spending contractor money. The Honda engine and AAA triplex pump are what make it worth the price. You can get more PSI for less, but you’ll likely be replacing the cheaper machine in a few years.

Rating: 4.7/5

View on Amazon: Simpson PS3228-S

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Best Budget Gas: Simpson Clean Machine CM61456-S

The Clean Machine is Simpson’s entry into the residential market. At $299-359, it’s the most affordable gas model in the lineup, and it comes with a turbo nozzle and onboard soap tank that most machines in this price range skip.

Pros and Cons

Pros	Cons
Lowest price on this list by a significant margin	174cc engine is smaller than competing gas models
Turbo nozzle included for faster surface cleaning	No 25-degree nozzle tip
Onboard soap tank is convenient
Compact low-profile steel frame
Thermal relief valve protects pump from overheating

Testing Results

At 3200 PSI and 2.5 GPM, the CM61456-S handles residential tasks solidly. Concrete driveways: yes. Siding: yes. Deck and fence: yes. Car washing: possible with care, stick to the soap or 40-degree tip.

The turbo nozzle is the standout feature here. It rotates a 0-degree stream in a cone pattern, cleaning concrete faster than a standard flat tip. For a machine at this price, that’s a real addition.

Real-World Usage

The 12-inch never-flat wheels mean you’re not constantly fighting terrain. The compact frame stores easily. Setup is straightforward for anyone who’s used a gas power washer before.

The 174cc engine is on the smaller side, and you’ll notice it under extended use. This isn’t a machine for running 4-hour sessions. For typical weekend cleaning jobs, it’s more than fine.

Best Use Case

Weekend homeowners who need a capable gas machine without spending $400+. Driveways, decks, patios, fencing. Not for professionals or anyone expecting commercial-grade durability.

Verdict

If budget is the priority and you’re cleaning a typical suburban home, the CM61456-S punches above its price. The turbo nozzle and soap tank add real value. Just know what it is: a solid homeowner machine, not a contractor tool.

Rating: 4.3/5

View on Amazon: Simpson CM61456-S

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Best Mid-Range Step-Up: Simpson Clean Machine CM61083

The CM61083 is the next step up in the Clean Machine line. It bumps PSI to 3400, upgrades to the CRX engine with an AAA-quality axial cam pump, and ships fully assembled. For $329-399, it’s a tighter gap to the PS3228-S than the price suggests.

Pros and Cons

Pros	Cons
3400 PSI, highest output in the Clean Machine line	No onboard soap tank
CRX engine with AAA-quality axial cam pump	Only 4 nozzles, no 25-degree tip
Fully assembled out of the box
Thermal relief valve protects pump
Compact direct-drive design

Testing Results

The bump to 3400 PSI makes a difference on heavy stains and older concrete. Surface performance covers all the usual bases: driveways, siding, deck, fence, car washing with care.

The CRX engine is reliable and starts easily. Direct-drive means fewer moving parts than belt-drive setups. For a machine that lives in a garage and comes out seasonally, that simplicity is a feature.

Real-World Usage

The lack of a soap tank is a real omission if you clean vehicles or siding regularly. You’ll use the soap nozzle tip to draw from a bucket instead, which works but adds steps. For pure pressure cleaning without soap, it’s a non-issue.

At 62 lbs, it’s heavier than the CM61456-S. Still manageable solo but worth knowing before you buy.

Best Use Case

Homeowners who need a step up from the basic Clean Machine and don’t want to spend PowerShot money. Heavy residential cleaning: large driveways, two-story siding, stubborn deck staining from a previous season.

Verdict

The CM61083 sits in a tight spot between the CM61456-S and the PS3228-S. If soap tank matters, go with the CM61456-S. If you want more PSI and trust the CRX engine, the CM61083 is the stronger machine. The PS3228-S is still the better long-term buy if budget allows.

Rating: 4.4/5

View on Amazon: Simpson CM61083

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Best Aluminum Frame: Simpson ALH3425

The ALH3425 belongs to Simpson’s Aluminum Series, aimed at contractors who want a professional machine they can carry to job sites without throwing out their back. The aircraft-grade aluminum frame cuts weight without sacrificing rigidity, and pairs it with a Honda GX200 and AAA triplex pump.

Pros and Cons

Pros	Cons
Aircraft-grade aluminum frame, significantly lighter than steel	Higher price than steel-frame competitors at same PSI
Honda GX200 commercial engine	35 ft hose, shorter than the PS4240 and PS60843
AAA industrial triplex pump with PowerBoost technology
3600 PSI at 2.5 GPM, strong for this engine size
Corrosion-resistant frame, ideal for outdoor storage

Testing Results

The ALH3425 delivers 3600 PSI, a notch above the PS3228-S, through the same Honda GX200 engine block thanks to PowerBoost tech. Surface performance covers concrete, siding, deck, fence, and car washing with care.

The aluminum frame is the real reason to choose this model. Field reports from contractors who have run it for full seasons consistently mention the weight advantage when loading and unloading from a work truck. One contractor logged over 600 properties in a single season without major maintenance issues.

Real-World Usage

This machine is best suited for professionals who travel between jobs. The corrosion resistance of the aluminum frame matters if your machine lives outdoors or in a trailer. For a homeowner with a garage, the weight savings over steel aren’t worth the price premium.

The 10-inch pneumatic tires handle uneven terrain. Assembly quality has been inconsistent for some buyers; check all connections before the first use.

Best Use Case

Small cleaning businesses and contractors who need a machine light enough to move frequently but powerful enough for professional jobs. Deck restoration, paint prep, concrete cleaning on the go.

Verdict

The ALH3425 is a niche pick, but a great one for the right buyer. The aluminum frame is the differentiator. If you’re running this as a business tool, the weight savings and corrosion resistance pay off quickly. If you’re a homeowner, save the money and buy the PS3228-S instead.

Rating: 4.4/5

View on Amazon: Simpson ALH3425

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Best High-Powered: Simpson PS60843 PowerShot

The PS60843 is where Simpson gets serious. At 4400 PSI and 4.0 GPM, this is a contractor-grade machine built for extended use, tough jobs, and professionals who can’t afford downtime. The CRX 420cc engine drives an AAA triplex pump with PowerBoost technology and comes with a 50-foot Monster hose.

Pros and Cons

Pros	Cons
4400 PSI at 4.0 GPM, 17600 cleaning units	107-138 lbs depending on configuration, heavy to maneuver
CRX 420cc engine with low oil shutdown	Overkill for normal residential use
AAA triplex pump with PowerBoost and thermal relief
50-foot Monster hose, dual-braided
5 quick-connect nozzles

Testing Results

At 4400 PSI, this machine blasts through what lighter models leave behind. Heavy grease on concrete, paint prep, graffiti removal, deep staining in old driveway cracks. Concrete and driveway: yes, heavy duty. Siding: yes, but be careful with older paint. Deck: yes, excellent for paint prep and wood restoration. Car washing: possible, stay on low-angle tips and keep distance.

The 50-foot hose is a significant upgrade over the 25-foot units on smaller machines. You can cover a two-car driveway without moving the washer.

Real-World Usage

This is a contractor machine. Running it in a quiet neighborhood will attract attention. The 13-inch pneumatic tires roll across gravel and grass without issue, but at 107+ lbs, you’re not carrying this up stairs.

The CRX 420cc engine starts reliably, even after sitting through off-season storage. The 1.7-gallon fuel tank runs longer between refills than smaller models. If you’re working multi-hour commercial jobs, that matters.

If you’re a homeowner with a normal-sized property, this is more machine than you need. The PS3228-S handles the same residential tasks at lower cost and weight. The PS60843 earns its place on job sites, rental fleets, and large property cleaning.

Best Use Case

Contractors cleaning decks, driveways, equipment, and commercial properties. Homeowners with very large properties or stubborn concrete staining. Anyone who needs the muscle for paint prep or graffiti removal.

Verdict

The PS60843 is a serious machine. The 4400 PSI and 4.0 GPM combination puts it in true contractor territory. If you’re running a cleaning business or tackling high-PSI jobs regularly, it earns every dollar. For most homeowners, the PS3228-S is a smarter buy.

Rating: 4.6/5

View on Amazon: Simpson PS60843

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Best Professional: Simpson PS4240H-SP PowerShot

The PS4240H-SP sits at the top of Simpson’s residential-to-commercial crossover lineup. A Honda GX390 commercial engine paired with an AAA industrial triplex pump delivers 4200 PSI at 4.0 GPM. The 50-foot dual-braided hose, onboard accessory storage, and welded steel frame are built for professional environments.

Pros and Cons

Pros	Cons
Honda GX390 commercial engine, 389cc, 13 HP	Heaviest machine on this list at 136 lbs
4200 PSI at 4.0 GPM, 16800 cleaning units	Premium price point
50-foot dual-braided Monster hose
Onboard accessory storage for gun, wand, and nozzles
AAA industrial triplex pump with ceramic pistons and thermal relief

Testing Results

The GX390 engine is what separates this from the PS60843. Honda’s commercial series is quieter and smoother than the CRX engine, and the 389cc displacement means more torque at steady load. Surface performance is identical to the PS60843: everything from heavy concrete to paint prep.

The ceramic pistons in the triplex pump extend pump life significantly under commercial use. Thermal relief prevents overheating on long sessions. This machine is rated for the kind of workload where cheaper pumps fail.

Real-World Usage

The onboard accessory storage sounds like a small detail but adds up over a full work day. Gun, wand, and nozzles all have dedicated spots, which means fewer things left on the ground or forgotten at job sites.

At 136 lbs, this requires two people to load safely into a truck bed. Set it up at the job site and leave it there for the session. It’s not a machine you move frequently during a job.

Experienced contractors who have tested both engines consistently rate the Honda GX390 higher for long-run consistency and ease of starting in cold weather. If you’re running 4-6 hour cleaning sessions multiple days a week, the GX390 earns its premium.

Best Use Case

Professional cleaners, contractors doing exterior washing at scale, large-property owners who run their machine heavily every season. This is not a weekend machine for a 2,000 square-foot home.

Verdict

The PS4240H-SP is the most capable machine on this list. The Honda GX390 and AAA triplex pump combination is what professional-grade means in practice. If your cleaning workload justifies the price, it’s worth every dollar. If you’re a homeowner, the PS3228-S is where this list starts and ends for you.

Rating: 4.8/5

View on Amazon: Simpson PS4240H-SP

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What Makes the Best Simpson Pressure Washer?

PSI and GPM: The Two Numbers That Actually Matter

PSI measures pressure. GPM measures water flow. Multiply them together to get cleaning units, which is the real measure of how fast a machine cleans. A 3300 PSI machine at 2.5 GPM produces 8250 cleaning units. A 4400 PSI machine at 4.0 GPM produces 17600. That difference shows up immediately on concrete and heavy staining.

For most residential jobs, anything above 8000 cleaning units handles the job. Driveways, decks, siding, and outdoor furniture don’t require 4400 PSI. Where the higher numbers matter is long-session professional cleaning, old concrete with deep staining, paint prep, and graffiti removal.

Engine Quality: Honda vs Simpson CRX vs 174cc

Simpson builds machines with three main engine options. The Honda GX series is the benchmark in this category. The GX200 powers the PS3228-S and ALH3425. The GX390 powers the PS4240H-SP. Both are commercial-grade, start reliably, and are known for running thousands of hours with proper maintenance.

The CRX engine is Simpson’s own commercial engine. It powers the CM61083 and PS60843. It’s a solid engine, and the PS60843 version has strong field reviews from contractors. It’s not the Honda GX, but it’s a step above the consumer-grade 174cc engine in the CM61456-S.

For a machine you’ll use seasonally, any of these engines will last years. For commercial workloads, the Honda GX engines have the deeper long-term track record.

Pump Type: Triplex vs Axial Cam

Every Simpson on this list uses either a triplex pump or an axial cam pump. Triplex pumps have ceramic pistons and run cooler than axial cam designs. They last longer under heavy use and are more repairable when seals eventually wear. The PS3228-S, ALH3425, PS60843, and PS4240H-SP all use AAA industrial triplex pumps.

The CM61456-S and CM61083 use axial cam pumps. For residential use, axial cam pumps are fine and require no maintenance. For frequent or extended use, the triplex makes a real difference over time. If you’re choosing between a Clean Machine and a PowerShot, that pump difference is part of what you’re paying for.

Frame Material: Steel vs Aluminum

The majority of Simpson gas washers use a welded steel frame. It’s heavier but extremely durable and easy to repair if damaged. The ALH3425 is the exception, using aircraft-grade aluminum for significantly lighter weight without sacrificing rigidity.

For homeowners who park the machine in a garage, steel frame is fine. For contractors who load and unload frequently, the aluminum frame of the ALH3425 reduces cumulative wear on both the machine and the person moving it.

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Frequently Asked Questions