Best SIMPSON Pressure Washers: 6 Models Compared

Quick picks

Our 6 picks

1 Best overall

Simpson PowerShot 3300 PSI Gas Pressure Washer

Best for: Contractors and durable cold-water cleaning

Maximum Pressure

3300 PSI

Flow Rate

2.5 GPM

Power Source

Gas

Hose Length

25'

Nozzle Count

5

Pump Type

triplex plunger

View on Amazon: Simpson PowerShot 3300 PSI Gas Pressure Washer Affiliate link

The SIMPSON PowerShot PS3228 delivers 3300 PSI and 2.5 GPM from a Honda GX200 engine. It features a maintenance-free triplex plunger pump and a 25-foot Morflex hose. The unit weighs 74.8 pounds and includes five quick-connect tips. This gas pressure washer suits contractors and homeowners needing reliable cold-water cleaning for decks, driveways, and siding.

Pros

• Honda GX200 engine with low-oil shutdown
• Maintenance-free 3300 PSI triplex plunger pump
• 25-foot kink-resistant Morflex hose
• Five quick-connect spray tips included
• 10-inch pneumatic tires for smooth mobility

Cons

• Lower 3300 PSI output than some competitors
• 2.5 GPM flow rate is modest for large areas
• Not available in California due to emissions compliance

Good fit if

• You need a durable machine for contractor use
• You want easy starts from a Honda engine
• You clean medium-sized decks or driveways

Skip if

• You require high-flow cleaning above 2.5 GPM
• You live in California
• You prefer electric power sources

Verdict: SIMPSON PowerShot 3300 PSI offers professional-grade reliability for users who prioritize engine durability and steady performance over maximum power. It fits contractors and serious homeowners who need a dependable cold-water washer for routine maintenance tasks.

2 Best budget

Simpson Clean Machine 3400 PSI with Surface Cleaner

Best for: quick driveway cleaning with a surface cleaner

Maximum Pressure

3400 PSI

Flow Rate

2.5 GPM

Power Source

Gas

Engine Displacement

208 cc

Hose Length

25'

Pump Type

axial cam

View on Amazon: Simpson Clean Machine 3400 PSI with Surface Cleaner Affiliate link

The Simpson Clean Machine delivers 3400 PSI and 2.5 GPM from a 208 cc engine. It includes a 15-inch surface cleaner that covers ten times more area than a standard nozzle. The unit weighs 64 pounds and sits on 10-inch pneumatic tires for easy rolling. This gas pressure washer suits homeowners who want quick driveway cleaning without hauling heavy equipment.

Pros

• Includes a 15-inch surface cleaner for fast coverage
• 208 cc CRX engine with low-oil shutdown
• 10-inch pneumatic tires for smooth mobility
• 25-foot non-marring hose included

Cons

• Lower flow rate than the 4.0 GPM models on this list
• Heavier and bulkier than the lighter 3200 PSI variant
• Not available for sale in California

Good fit if

• You need a surface cleaner for large flat areas
• You prefer gas power for higher pressure
• You want a complete kit with tips and hose

Skip if

• You live in California
• You require 4.0 GPM for heavy-duty jobs
• You want a quieter electric model

Verdict: Simpson Clean Machine 3400 PSI is a solid choice for homeowners who prioritize speed on flat surfaces thanks to the included surface cleaner. It fits you well if you need reliable gas power and easy mobility without the bulk of commercial units.

3 Also great

SIMPSON Aluminum Series 3600 PSI Gas Pressure Washer

Best for: Professional contractors needing durable equipment

Maximum Pressure

3600 PSI

Flow Rate

2.5 GPM

Power Source

Gas

Hose Length

35 ft

Nozzle Count

5

Pump Type

Triplex plunger

View on Amazon: SIMPSON Aluminum Series 3600 PSI Gas Pressure Washer Affiliate link

The Simpson Aluminum Series delivers 3600 PSI and 2.5 GPM for professional cleaning tasks. It features a Honda GX200 engine and a durable aircraft-grade aluminum frame. The unit includes a 35-foot hose and pneumatic tires for easy mobility. This gas pressure washer suits contractors and serious homeowners who need reliable performance and corrosion resistance for decks, siding, and equipment.

Pros

• Honda GX200 engine with low-oil shutdown
• Aircraft-grade aluminum frame resists corrosion
• 35-foot Morflex high-pressure hose included
• 10-inch pneumatic tires for smooth transport
• Five quick-connect nozzle tips included

Cons

• Lower flow rate of 2.5 GPM compared to 4.0 GPM competitors
• Lower pressure of 3600 PSI compared to 4200 PSI models
• Heavier build at 79 pounds

Good fit if

• You need a durable, corrosion-resistant machine for professional use
• You prefer the reliability of a Honda engine
• You value long hose reach for large areas

Skip if

• You require higher pressure for heavy-duty stripping
• You need faster cleaning with higher water flow
• You want a lighter unit for easy lifting

Verdict: SIMPSON Aluminum Series 3600 PSI Gas is a solid choice for contractors who prioritize engine reliability and frame durability over raw power specs. It fits users who value long-term build quality and mobility features like pneumatic tires.

4 Best premium

Simpson King Brute 4000 PSI 4.0 GPM Gas Washer

Best for: industrial grease removal and fleet cleaning

Maximum Pressure

4000 PSI

Flow Rate

4.0 GPM

Power Source

Gas

Hose Length

50'

Nozzle Count

5

Pump Type

triplex plunger

View on Amazon: Simpson King Brute 4000 PSI 4.0 GPM Gas Washer Affiliate link

This Simpson King Brute is a hot water gas pressure washer designed for industrial tasks. It delivers 4000 PSI and 4.0 GPM using a Honda GX390 engine and a General Pump triplex plunger pump. The unit includes a 50-foot hose and four nozzle tips. Its heavy steel frame and pneumatic tires support maneuverability. You will find this model suits those needing high heat and flow for grease removal.

Pros

• Hot water capability for tough grease
• 4.0 GPM flow rate for fast cleaning
• Honda GX390 engine for reliable power
• Triplex plunger pump for durability

Cons

• Heavy 375-pound weight limits portability
• Large dimensions require significant storage space
• Diesel burner fuel tank capacity is small

Good fit if

• You need hot water for industrial grease
• You require high flow rate for speed
• You have space for a heavy unit

Skip if

• You prefer lightweight portable equipment
• You only clean light residential dirt
• You lack storage for large machines

Verdict: Simpson King Brute 4000 PSI Hot Water is built for heavy industrial cleaning. You should buy it if you need hot water power and high flow for fleet or factory maintenance.

5 Also great

Simpson 3600 PSI Gas Pressure Washer

Best for: Heavy-duty commercial cleaning tasks

Maximum Pressure

3600 PSI

Flow Rate

2.5 GPM

Power Source

Gas

Hose Length

25 ft

Nozzle Count

5

Pump Type

Triplex plunger

View on Amazon: Simpson 3600 PSI Gas Pressure Washer Affiliate link

This Simpson unit delivers 3600 PSI at 2.5 GPM for heavy-duty cleaning tasks. It features a CRX210 engine and a triplex plunger pump built for industrial use. You get a 25-foot hose and five nozzle tips for versatile cleaning. The 135-pound frame includes pneumatic tires and locking brakes for stability. It suits professionals needing reliable, high-pressure performance on commercial jobs.

Pros

• 3600 PSI output for tough stains
• Industrial triplex plunger pump
• 25-foot high-pressure hose included
• Five quick-connect nozzle tips
• Wheel locking brakes for safety

Cons

• Lower 2.5 GPM flow rate than top competitors
• Heavy 135 lb weight
• Small 0.8 gallon fuel tank

Good fit if

• You need high pressure for commercial jobs
• You value durable industrial pump construction
• You want a stable unit with locking brakes

Skip if

• You prioritize high water flow over pressure
• You need long runtime without refueling
• You want a lightweight portable unit

Verdict: Simpson 3600 PSI Commercial Gas Washer offers strong pressure for industrial tasks but trades flow rate and fuel capacity for durability. It fits professionals who need reliable power on tough jobs rather than speed or portability.

6 Best 4200 psi

SIMPSON Water Blaster 4200 PSI Gas

Best for: contractors needing high flow and power

Maximum Pressure

4200 PSI

Flow Rate

4.0 GPM

Power Source

Gas

Hose Length

50 ft

Nozzle Count

5

Pump Type

Triplex plunger

View on Amazon: SIMPSON Water Blaster 4200 PSI Gas Affiliate link

This Simpson Water Blaster delivers 4200 PSI and 4.0 GPM using a Honda GX390 engine. It features a commercial-grade triplex plunger pump and a 50-foot high-pressure hose. The welded steel frame supports 13-inch pneumatic tires for rough terrain. With five quick-connect nozzle tips and a safety-lock spray gun, it suits contractors needing professional performance for deck cleaning and wood restoration.

Pros

• 4200 PSI maximum pressure output
• 4.0 GPM flow rate for fast cleaning
• Honda GX390 commercial series engine
• 50-foot kink-resistant high-pressure hose
• Includes five quick-connect nozzle tips

Cons

• Weighs 159 pounds, making it heavy to lift
• Does not ship to California
• Large footprint at 44.3 inches long

Good fit if

• You need high flow rates for large jobs
• You work on uneven terrain with pneumatic tires
• You require commercial-grade durability for contractors

Skip if

• You live in California due to shipping restrictions
• You prefer lightweight equipment under 100 pounds
• You need electric power sources instead of gas

Verdict: SIMPSON Water Blaster 4200 PSI Gas is built for contractors who need serious power and flow. Its commercial engine and large hose make it ideal for heavy-duty deck cleaning and wood restoration projects.

Specifications side by side

SIMPSON Pressure Washer Lineup

This comparison covers six gas-powered models, ranging from 3300 PSI to 4200 PSI. The Simpson PowerShot 3300 PSI and Clean Machine 3400 PSI offer reliable cold-water performance for homeowners and contractors. The Clean Machine includes a surface cleaner for quick driveway work, while the PowerShot prioritizes engine durability for routine maintenance tasks. Both units feature compact frames and manageable weights under 75 pounds. The lineup also includes the Aluminum Series 3600 PSI and the standard 3600 PSI Commercial model. These heavier units trade flow rate for long-term build quality, fitting users who need durable equipment for tough jobs rather than speed. Industrial users might prefer the King Brute 4000 PSI Hot Water or the Water Blaster 4200 PSI. These high-flow units handle heavy grease and fleet cleaning, though their substantial weight requires serious mobility considerations.

Who SIMPSON Range Suits

SIMPSON covers the full gas-powered spectrum, from 3300 PSI entry models to 4200 PSI heavy-duty units. You can find compact, sub-80-pound washers for homeowners, alongside massive 375-pound industrial hot water machines for fleet maintenance. The lineup emphasizes durability with aluminum frames and commercial engines. However, the range is exclusively gas-powered. You will not find electric, battery, or cold-water-only home models here. The brand focuses on contractors and professionals who need raw power and flow rates up to 4.0 GPM for tough commercial tasks.

How to choose the right SIMPSON pressure washer

1. Match PSI to your task

   Pressure determines how well the machine removes stuck-on grime. You should select 3300 PSI for routine home maintenance, such as cleaning siding or patio furniture. The Simpson PowerShot 3300 PSI offers professional-grade reliability for these everyday jobs. If you need to strip paint or clean heavy industrial grease, consider the Simpson King Brute 4000 PSI. Higher pressure provides more force, but it also requires more care to avoid damaging delicate surfaces. Choose the level that matches your toughest cleaning project.

2. Prioritize flow rate for speed

   Flow rate, measured in gallons per minute, dictates how quickly water rinses away dirt. A higher GPM cleans faster than high pressure alone. The Simpson King Brute 4000 PSI and Water Blaster 4200 PSI both deliver 4.0 GPM, making them ideal for large areas like driveways or fleet vehicles. Standard models like the PowerShot 3300 PSI provide 2.5 GPM, which is sufficient for smaller residential tasks. If you value speed over raw impact, look for units with higher flow rates to reduce your total cleaning time.

3. Select gas for power

   All models in this guide run on gasoline, providing consistent power without cord limitations. Gas engines deliver the high pressure needed for tough jobs. The Simpson Clean Machine 3400 PSI is a solid choice for homeowners who need reliable gas power and easy mobility. This setup is perfect for outdoor tasks where electricity is not available. You will need to manage fuel storage and maintenance, but you gain the freedom to move your washer anywhere on your property without worrying about extension cords.

4. Check weight for mobility

   Weight affects how easily you can move and store your machine. Lighter units under 80 pounds, like the Simpson Clean Machine at 64 pounds, are easy to roll around. Heavier commercial models, such as the Simpson PowerShot 3300 PSI at 74.8 pounds, offer more stability but require more effort to lift. The industrial King Brute weighs 375 pounds and is not meant for portable use. Consider your storage space and lifting ability when choosing between compact home models and heavy-duty commercial equipment.

5. Consider hot water for grease

   Hot water dissolves oils and grease much faster than cold water. The Simpson King Brute 4000 PSI is a hot water unit built for industrial cleaning tasks. If you clean machinery, vehicles, or factory floors, hot water saves time and reduces chemical use. Cold water models, like the Aluminum Series 3600 PSI, are better for general dirt and mud removal. Choose hot water only if your specific cleaning challenges involve significant oil, grease, or sticky residues that cold water cannot handle effectively.

Frequently asked questions

See also

• best SIMPSON pressure washers with 4 0 gpm
• best SIMPSON 4400 PSI pressure washers
• best SIMPSON pressure washers
• pressure explained