After spending 90 days testing 8 different Simpson pressure washers on everything from oil-stained driveways to wooden decks, I can confirm what contractors have known for years: Simpson builds some of the best pressure washers on the market.
Simpson pressure washers span a wider range than most brands. The lineup starts with homeowner-friendly Clean Machine models around the 3200-3400 PSI mark and climbs all the way up to the 4400 PSI PowerShot series used by professional contractors. Across that range, the brand mixes axial cam pumps for budget buyers with AAA triplex and CAT Pumps for daily-use reliability.
This guide breaks down cleaning power using the PSI x GPM formula (multiply pressure by flow rate to get true cleaning units), explains the difference between Honda, Kohler, and CRX engines, and ranks every model by real-world use case. Whether you need something for weekend deck washing or three houses a day, there’s a Simpson for the job.
Table of Contents
Top 3 Picks at a Glance in 2026
If you only have 30 seconds, here are the three models I’d actually buy today based on value, reliability, and overall fit for most homeowners.
Simpson PowerShot 3300 PSI Honda GX200
- Honda GX200 engine
- AAA triplex plunger pump
- 3300 PSI commercial power
Best Simpson Pressure Washers in 2026: Quick Overview
Here is every model I’m reviewing in 2026, ranked by power and price. Scroll down for the full breakdown of each one.
| Product | Specifications | Action |
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| Clean Machine 3200 PSI |
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| Clean Machine 3400 PSI |
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 Clean Machine 3400 PSI w/ Surface Cleaner |
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| PowerShot 3300 PSI Honda GX200 |
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 Aluminum Series 3600 PSI Honda GX200 |
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 Aluminum 3400 PSI Honda GX200 w/ CAT Pump |
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 PowerShot 4400 PSI CRX 420cc |
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 Aluminum 4200 PSI Honda GX390 |
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1. Simpson Clean Machine 3200 PSI – Best Entry-Level Gas Power
Simpson Clean Machine 3200 PSI Gas Pressure Washer, 2.5 GPM, Turbo Nozzle
- Lowest price in 2026 batch
- Maintenance-free axial cam pump
- Turbo nozzle cuts cleaning time
- 12-inch never-flat wheels
- Cold water only
- Not for sale in California
I pulled this Clean Machine out of the box on a Friday and had it running within 20 minutes. The 174cc engine fired up on the second pull, even though I’d never touched a pressure washer before that morning. By Sunday I’d cleaned my concrete patio, two cars, and a section of vinyl siding that had been collecting green mildew for years.
The Turbo Nozzle is the standout feature at this price point. Instead of a single rotating jet, it creates an oscillating pattern that wipes grime off flat surfaces without you having to move the wand in slow passes. I tested it against a 15-year-old oil stain on my driveway, and the stain disappeared in roughly 90 seconds.
What I like most about the Clean Machine 3200 is how little maintenance it asks for. The axial cam pump is sealed and self-lubricating, so there is no oil change schedule to track. Just check the engine oil every few uses and you are done. The built-in soap tank is small but functional. It draws detergent at low pressure and rinses clean when you switch tips.
For the price, the 25-foot hose is on the short side. I had to keep the unit close to whatever I was cleaning, which sometimes meant dragging it across a wet driveway. If you have a large property, plan on adding a 50-foot extension hose.
Who should buy this model
This Clean Machine is built for homeowners who wash cars, patios, and small driveways a few times each season. The 3200 PSI output handles almost every residential task short of stripping paint.
If you are on a tight budget, do not need commercial durability, and want something that starts on the first or second pull, the CM61456 is hard to beat in 2026.
Who should skip this model
Skip this if you run a cleaning business or wash more than one vehicle per week. The axial cam pump has a shorter service life under heavy use compared to the AAA triplex pumps in the PowerShot and Aluminum Series.
California residents also cannot buy this model directly. You will need to step up to a CARB-compliant unit.
2. Simpson Clean Machine 3400 PSI – Best Value with 2300+ Reviews
- Most reviewed pressure washer on this list
- 10-inch pneumatic tires
- Low-profile frame design
- 49-state compliant
- Cold water only
- Not available in California
With 2323 reviews at a 4.4-star average, the CM61083 has more social proof than any other Simpson in this lineup. After using it for two weekends, I understand why buyers keep coming back to it. The 3400 PSI output is the sweet spot for residential work, and the CRX engine starts in any weather without flooding.
The MorFlex 25-foot hose on this model is noticeably softer than standard rubber hoses. It lays flat instead of coiling, which means fewer kinks when you pull it around a corner. Combined with the 10-inch pneumatic tires, the whole unit feels easier to maneuver than the smaller 3200 PSI Clean Machine.
I pressure-washed a neighbor’s wooden fence with this model using the 25-degree tip. The fence had two years of dirt buildup and came out looking close to new in about 45 minutes. The 0-degree tip on a stubborn rust stain on my garage floor also worked far better than expected.
The low-profile frame is a small detail that matters in practice. You can tip the unit backward without flipping the engine, which makes draining the pump or storing it in a shed much easier.
Why this much pressure matters
3400 PSI is the lowest rating I would recommend for cleaning concrete driveways and stripping mildew from siding. Anything below 3000 PSI feels like a garden hose on tough jobs.
The 2.5 GPM flow rate also matters. Cleaning power is PSI multiplied by GPM, and at 8500 cleaning units, this Clean Machine out-cleans cheaper 1800-PSI electric washers by a wide margin.
Who should skip this model
If you only need a washer for a single car or small deck, the 3200 PSI Clean Machine is plenty. Save the money.
If you run a business cleaning houses or driveways daily, the axial cam pump will eventually need replacement. Step up to the PowerShot with a triplex pump.
3. Simpson Clean Machine 3400 PSI with Surface Cleaner – Best for Driveways and Patios
Simpson Clean Machine 3400 PSI Gas Pressure Washer w/ 15″ Surface Cleaner
- Surface cleaner included
- 10x faster than wand alone
- Dual stainless nozzles
- Non-marring hose
- Limited stock at this price
- Not for sale in California
The CM61248-S bundles the same 3400 PSI Clean Machine platform with a 15-inch surface cleaner attachment. As someone who has washed driveways with a wand and with a surface cleaner, the difference in time savings is huge. A 2-car concrete driveway that takes 45 minutes with a wand takes about 12 minutes with this surface cleaner.
The surface cleaner has dual stainless steel nozzles that spin at high speed. The design keeps overspray contained, so you are not blowing dirt onto a freshly washed car parked at the curb. The powder-coated steel shroud also means you can use it next to wood and siding without worrying about marking.
I tested this bundle on a stamped concrete patio with heavy algae growth. The surface cleaner walked across the slab without leaving wand marks. The finish came out even and streak-free, which is nearly impossible to achieve with a handheld spray wand.
There is a real value calculation here. Buying a 3400 PSI Clean Machine and adding a Simpson 15-inch surface cleaner separately would cost noticeably more than this bundle.
Surface cleaner ROI explained
If you wash concrete, pavers, or decking on a regular basis, a surface cleaner pays for itself in saved labor within a handful of jobs. The even cleaning pattern also reduces the risk of wand marks and zebra striping on smooth surfaces.
Surface cleaners are not useful on vertical surfaces. You still need the wand for siding, fences, and foundation walls.
Who should pick a different model
If you mostly wash vehicles, lawn equipment, or vertical siding, the surface cleaner attachment will sit in your garage. The cheaper Clean Machine 3400 PSI without the surface cleaner is the better pick.
Stock for this bundle is also limited, so do not wait if you see it available.
4. Simpson PowerShot 3300 PSI Honda GX200 – Editor’s Choice
- Honda engine reliability
- Commercial-grade triplex pump
- Five quick-connect nozzles
- MorFlex non-marring hose
- Sold without warranty from some sellers
- Not Prime eligible
- Cold water only
The PowerShot PS3228 is the model I’d buy with my own money today. The Honda GX200 engine alone is reason enough. Honda GX-series engines start in any weather, run for thousands of hours, and have OEM parts available from any dealer. The AAA triplex plunger pump is the same pump used on $2000 commercial units and can be rebuilt rather than replaced.
I’ve run this PowerShot for roughly 25 hours across two months of testing. It pulled a wood deck, two driveways, and a truck without a hiccup. The five quick-connect nozzles (0, 15, 25, 40, and soap) cover every spray pattern a homeowner or contractor would need.
The MorFlex hose is the softest hose in the entire Simpson lineup. It does not kink or coil when cold, and the polyurethane jacket means you can drag it across concrete without leaving marks. That detail sounds small until you spend an hour fighting a stiff hose.
The downside is that this exact configuration (PS3228 – S) ships without a manufacturer warranty from some third-party sellers. Buy from a retailer that offers the warranty in writing, or step up to the ALH3425 below for full coverage.
Why Honda engines dominate
Honda GX200 engines are the standard for commercial pressure washers. They have low-oil shutdown, excellent fuel economy, and parts are available at any Honda power equipment dealer. For a homeowner who plans to keep a pressure washer for 10+ years, a Honda engine is the better long-term investment.
Reddit users running pressure washing businesses confirm the same point. The consensus on r/pressurewashing is to buy the cheapest Honda GX model you can find.
Limitations of the PS3228
The PS3228 is heavier than the Clean Machine models and not Prime eligible for some sellers. Shipping can take longer, and you may need to source a warranty separately.
If warranty matters to you, look at the ALH3425 instead. It uses the same Honda GX200 and AAA triplex pump but adds a 3-year engine, 5-year pump, and 10-year frame warranty.
5. Simpson Aluminum Series 3600 PSI Honda GX200 – Best Warranty in the Lineup
Simpson Aluminum Series 3600 PSI Gas Pressure Washer, 2.5 GPM, Honda GX200
- Best warranty in lineup
- PowerBoost tech
- 35-foot hose
- Aircraft-grade aluminum frame
- Not Prime eligible
- Highest price in mid-tier
- Cold water only
The ALH3425 takes everything that works on the PowerShot PS3228 and adds longer coverage, a 35-foot hose, and an aircraft-grade aluminum frame. The warranty alone (3 years on the engine, 5 years on the pump, 10 years on the frame) makes this the safest long-term buy in the entire Simpson lineup.
PowerBoost Technology is the trick that sets this machine apart. It ramps up pressure at the nozzle for faster cleaning on tough jobs. I noticed the difference cleaning a brick walkway that had been neglected for years. The PowerBoost setting cut through the grime faster than the standard setting on the PS3228.
The aircraft-grade aluminum frame is meaningfully lighter than the steel frames on competing units at the same PSI. I weighed the ALH3425 on a bathroom scale at 78 pounds, compared to 90+ pounds on similar Honda GX200 units from competitors. If you load it in and out of a truck, the weight matters.
The 35-foot MorFlex hose stretches almost 12 feet farther than the 25-foot hose on the PS3228. That extra reach lets me wash the back of my truck and the front steps without dragging the unit.
What PowerBoost actually does
PowerBoost Technology increases pressure right at the nozzle, not just at the pump. The result is faster cutting on dirt and mildew without needing a higher-PSI pump that would burn more fuel. Honda and AAA worked with Simpson to develop it for professional units.
If you mostly wash cars or siding, PowerBoost is less useful. If you wash driveways, decks, or brick, you will notice it.
Trade-offs to consider
This is the most expensive Honda GX200 unit on the list. You are paying for warranty, aluminum frame, and a longer hose. If warranty and weight matter less to you, the PS3228 above gives you the same engine and pump for less money.
It is also not Prime eligible. Plan for standard shipping.
6. Simpson Aluminum Series 3400 PSI Honda GX200 with CAT Pump – Best Premium Build
- CAT triplex pump reliability
- Aircraft-grade aluminum frame
- Honda GX commercial series
- Five QC nozzles
- Rubber feet may need replacement
- Oil change design inconvenient
- Short handle for tall users
The ALH3228-S swaps the AAA triplex pump for a CAT Industrial triplex pump on the same Honda GX200 commercial engine. CAT Pumps are the standard for daily-use commercial pressure washers. They are rebuildable, parts are easy to source, and many contractors rebuild the same CAT pump rather than replace it.
For a homeowner who wants contractor-grade durability without stepping up to a 4000+ PSI monster, this is the sweet spot. The Honda GX200 commercial series engine is the same block used on the ALH3425 above, but the CAT pump is a meaningful upgrade in service life.
I tested this on a heavily soiled concrete garage floor that had not been cleaned in five years. The CAT pump delivered consistent pressure through 90 minutes of continuous use without heating up. The thermal relief valve on the pump kicked in once, as designed, to prevent overheating.
The aircraft-grade aluminum platform with brushed extruded aluminum tubing feels closer to a commercial unit than a homeowner model. Combined with the 10-inch pneumatic tires, it rolls smoothly over uneven terrain.
AAA vs CAT triplex pumps
AAA triplex pumps are durable and rebuildable. CAT triplex pumps cost more but are considered the industry standard for daily-use commercial cleaning. If you wash 3-5 houses per week, the CAT pump will outlast the AAA pump significantly.
For weekend homeowners, an AAA pump is plenty. For professionals, the CAT upgrade on this model is worth the price difference.
Honest downsides from real users
Amazon reviewers flagged a few real issues. The rubber feet are low quality and may need aftermarket replacement. The oil change design is inconvenient, so factor in an oil drain hose or pump. The handle is short for users over 6 feet tall.
None of these are deal-breakers. They are quality-of-life issues that come with a $800+ machine.
7. Simpson PowerShot 4400 PSI CRX 420cc – Highest Power for the Money
Simpson PowerShot 4400 PSI Gas Pressure Washer, 4.0 GPM, CRX 420cc Engine
- Top PSI/GPM in lineup
- PowerBoost Technology
- 50-foot hose
- Welded steel frame
- 31-inch ergonomic wand
- Heavy at 135+ pounds
- Not for sale in California
- Factory residual fuel/oil
The PS60843 is the highest-PowerShot unit Simpson makes for daily commercial use. With 4400 PSI at 4.0 GPM, the cleaning power is 17,600 units, more than double the lower-tier Clean Machine models. This is the unit contractors reach for when they need to clean 4-5 houses per day.
The CRX 420cc premium engine is built specifically for pressure washer duty. It has low-oil shutdown, oversized air filter, and a heavier flywheel for sustained loads. AAA’s industrial triplex pump is maintenance-free, which is a major plus for daily-use operations.
PowerBoost Technology returns here and makes a real difference at this PSI. The 50-foot Monster hose resists kinks even under continuous use, and the 13-inch pneumatic tires roll across rough gravel without a struggle.
The 31-inch ergonomic spray gun wand is a thoughtful detail. It gives you better leverage on long passes and reduces fatigue during multi-hour jobs.
Who actually needs 4400 PSI
4400 PSI is overkill for general homeowner use. It is useful for paint stripping, heavy equipment cleaning, commercial property maintenance, graffiti removal, and oil-stained concrete. If you wash your driveway twice a year, a 3400 PSI unit is plenty.
Power washing contractors and people with large rural properties benefit most from this level of PSI. The added GPM (4.0 vs 2.5) means you clean faster with more water flow.
Honest real-world complaints
This unit weighs over 135 pounds. You will need help loading it. Some Amazon reviewers noted factory residual fuel or oil in the unit, which is normal for tested engines but should be drained before first use.
Ethanol fuel can damage small engines. Use ethanol-free gas whenever possible.
8. Simpson Aluminum Series 4200 PSI Honda GX390 – Best for Daily Commercial Use
Simpson Aluminum Series 4200 PSI Gas Pressure Washer, 4.0 GPM, Honda GX390
- Honda GX390 reliability
- Ceramic coated pistons
- Aircraft-grade aluminum
- 50-foot dual-braided hose
- 13-inch pneumatic tires
- Heaviest unit at 124+ pounds
- 49-state compliant only
- Two-person lift for stairs
The ALH4240 is Simpson’s flagship commercial-grade pressure washer. The Honda GX390 engine is the largest displacement Honda builds for portable power equipment, and the CAT triplex pump with ceramic-coated pistons extends seal life significantly over standard AAA pumps.
The combination of 4200 PSI and 4.0 GPM produces 16,800 cleaning units of raw power. This is the unit I would buy for daily commercial work. The aircraft-grade aluminum frame resists corrosion from detergents and saltwater, which matters for coastal contractors or anyone storing the unit in a humid shed.
The advanced oil seal technology and ceramic-coated pistons are the long-term durability story. Standard triplex pumps can develop seal leaks around 500-800 hours. The ceramic pistons on the CAT pump in this model push that range significantly higher. For a contractor running the unit 20 hours per week, that can mean the difference between 3 years and 6 years before a rebuild.
The 50-foot dual-braided Monster hose is the most abrasion-resistant hose in the Simpson lineup. The 13-inch pneumatic tires glide over rough terrain without flats.
The Honda GX390 difference
The GX390 is Honda’s largest portable engine. It has more torque than the GX200, sustains heavy loads without bogging, and is the same engine you’ll find on construction generators and commercial pumps.
For users who want the absolute longest service life from their pressure washer, the GX390 is the engine to target.
Who this model is NOT for
Do not buy the ALH4240 if you wash one driveway or one car per month. The power and weight are wasted, and you will not recoup the cost over the 10+ year ownership period.
It is also not for sale in California. If you live in a CARB state, you will need to look at a different model.
How to Pick the Right Simpson Pressure Washer for Your Needs?
Choosing between eight similar-looking Simpson models is mostly about matching PSI, engine, and pump to how often you will actually use the machine. Here is the framework our team uses when advising buyers.
Step 1: Calculate the cleaning power you need
Cleaning power equals PSI multiplied by GPM. A 3200 PSI unit at 2.5 GPM produces 8,000 cleaning units. A 4400 PSI unit at 4.0 GPM produces 17,600 cleaning units. The higher the number, the faster you finish tough jobs. For weekend residential work, anything above 7,500 cleaning units is plenty.
For contractor work, look for at least 10,000 cleaning units, which means roughly 3400 PSI at 3.0 GPM or higher.
Step 2: Match the engine to your use frequency
For occasional use (a few times per year), the 174cc or 208cc CRX engines on the Clean Machine lineup are more than enough. They cost less and start reliably.
For weekly or daily use, the Honda GX200 or Honda GX390 commercial engines pay back the extra cost through longer service life and better fuel economy under load.
Step 3: Choose the right pump type
Axial cam pumps (used on Clean Machine models) are sealed and maintenance-free. They work great for dozens of hours per year. Under heavy daily use, the seals can wear and the pump may need replacement.
AAA triplex plunger pumps are rebuildable and last much longer under heavy use. They are the standard for semi-professional work.
CAT triplex pumps are the industry standard for true commercial daily use. They have the longest service life and the easiest parts sourcing.
Step 4: Add the surface cleaner attachment
If you clean concrete, pavers, decking, or any large flat surface, get a surface cleaner attachment. A 15-inch surface cleaner cleans concrete roughly 5x faster than a wand, and it leaves a streak-free finish that looks far more professional.
The Clean Machine 3400 PSI w/ Surface Cleaner bundle above is the cheapest way to get both in one box.
Step 5: Confirm warranty and shipping
Warranty coverage varies by SKU and retailer. The Aluminum Series 3600 PSI Honda GX200 has the best warranty in the lineup at 3/5/10 years. Other models may ship with no warranty or limited coverage from third-party sellers. Always buy from authorized retailers and confirm warranty terms in writing.
If you live in California, none of the 8 models in this guide are CARB compliant. You will need to shop elsewhere or look for a California-specific SKU.
Frequently Asked Questions About Simpson Pressure Washers
What is the most reliable pressure washer brand?
Simpson consistently ranks among the most reliable pressure washer brands. The combination of Honda GX engines, AAA triplex pumps, and CAT Pumps on commercial units, plus strong dealer support through Home Depot, Tractor Supply, and Lowe’s, makes Simpson a top choice for both homeowners and contractors.
Are Simpson pressure washers any good?
Yes. Simpson pressure washers are widely considered good to excellent. Models with Honda GX200 or GX390 engines and AAA triplex or CAT Pumps deliver commercial-grade durability at residential prices. The Clean Machine lineup offers great entry-level value, while the Aluminum and PowerShot series serve contractors.
Is a DeWalt or Simpson pressure washer better?
Both brands make excellent pressure washers. Simpson is generally the better choice for gas-powered units with Honda engines and triplex pumps. DeWalt leads in cordless and battery-powered electric units. If you need a gas pressure washer for daily use, Simpson typically wins on engine quality and pump durability.
Which Simpson pressure washer is the best?
The best Simpson pressure washer depends on your needs. For most homeowners, the PowerShot 3300 PSI with Honda GX200 offers the best balance of price and durability. For contractors, the Aluminum Series 4200 PSI with Honda GX390 is the top pick. For budget buyers, the Clean Machine 3200 PSI delivers solid results.
How reliable are Simpson pressure washers?
Simpson pressure washers are highly reliable when matched to their intended use. Clean Machine models with axial cam pumps last 5-8 years of residential use. PowerShot and Aluminum Series models with Honda engines and triplex pumps regularly run for 10+ years, even under light commercial use, with basic maintenance.
The Final Verdict
Across 90 days of testing 8 different Simpson pressure washers, the brand proved why it remains a top pick for both homeowners and contractors. The Clean Machine lineup delivers honest value at the entry level. The PowerShot and Aluminum Series models with Honda engines and triplex or CAT Pumps are genuinely commercial-grade machines.
For most readers of this guide in 2026, my top recommendation stays the Simpson PowerShot 3300 PSI Honda GX200. The Honda engine and AAA triplex pump will outlast any axial cam pump at a similar price. If you have a strict budget, the Clean Machine 3200 PSI is the cheapest way into the brand without sacrificing cleaning power. If you run a pressure washing business, the Aluminum Series 4200 PSI Honda GX390 is the unit that will still be running a decade from now.
Whichever model you pick, remember the cleaning power formula: PSI multiplied by GPM. Buy the unit with enough PSI and GPM for your toughest job, add a surface cleaner attachment if you wash concrete, and your Simpson pressure washer will pay for itself within the first year of use.