SIMPSON is one of the most respected names in the pressure washer industry. In 2025, SIMPSON pressure washers continue to dominate the market with powerful gas engines, durable pumps, and commercial-level build quality. These machines are trusted by homeowners, contractors, professional cleaners, and industrial users who need reliable performance every single day.
Known for heavy-duty frames, long-lasting triplex pumps, and strong Honda and proprietary engines, SIMPSON pressure washers are built to handle everything from light home cleaning to tough commercial and industrial jobs.
Why Choose SIMPSON Pressure Washers in 2025?
SIMPSON machines are built for durability and raw power. Unlike light-duty brands, SIMPSON focuses on commercial-grade components even in their mid-range models.
Key Benefits of SIMPSON Pressure Washers
- High PSI and high GPM performance
- Honda and professional-grade engines
- Heavy steel frames with powder coating
- Industrial-grade triplex pumps
- Long hose lengths for easy work coverage
- Designed for long working hours
Types of SIMPSON Pressure Washers in 2025
SIMPSON divides its models into three major categories:
Home Series
Designed for regular homeowners who want strong cleaning for cars, patios, and driveways.
Prosumer Series
Built for serious DIY users and small business owners.
Commercial Series
Designed for contractors, industrial use, fleet washing, and construction environments.
Best SIMPSON Home Pressure Washers 2025
SIMPSON MegaShot 3000 PSI – Full Review
The MegaShot 3000 is one of the most popular home-use models.
Key Specifications
- PSI: 3000 PSI
- GPM: 2.4 GPM
- Pump Type: Axial Cam Pump
- Engine: 196cc Gas Engine
- Hose Length: 25 ft
Best Uses
- Car washing
- Patio cleaning
- Fence washing
- Light driveway cleaning
Pros
- Strong pressure for home use
- Easy to assemble
- Affordable compared to competitors
- Lightweight for a gas model
Cons
- Axial pump has a shorter lifespan than a triplex
- Not ideal for daily commercial use
SIMPSON Clean Machine CM61083 – Full Review
This model is slightly stronger than the MegaShot and is built for heavier home jobs.
Key Specifications
- PSI: 3200 PSI
- GPM: 2.5 GPM
- Pump Type: Axial Cam
- Engine: CRX Engine
- Hose Length: 30 ft
Best Uses
- Wooden decks
- Concrete patios
- Driveways
- Outdoor walls and siding
Pros
- Higher power than entry models
- Good water flow
- Easy mobility with large wheels
Cons
- Louder than electric models
- Requires fuel maintenance
Best SIMPSON Prosumer Pressure Washers 2025
SIMPSON PowerShot PS4240 – Full Review
The PowerShot PS4240 is designed for users who want professional-level cleaning without buying a full industrial machine.
Key Specifications
- PSI: 4200 PSI
- GPM: 4.0 GPM
- Pump Type: Triplex Plunger Pump
- Engine: HONDA GX390
- Hose Length: 50 ft
Best Uses
- Heavy driveway cleaning
- Oil stain removal
- Contractor work
- Farm equipment washing
Pros
- Extremely strong pressure
- High water flow
- Long-lasting triplex pump
- Durable steel frame
Cons
- Heavy to move
- Higher price
SIMPSON ALH4240 – Aluminum Frame Series
This model is built for users who want power with a lighter frame.
Key Specifications
- PSI: 4200 PSI
- GPM: 4.0 GPM
- Pump Type: Triplex
- Frame: Aircraft-grade aluminum
- Engine: Honda GX engine
Best Uses
- Mobile cleaning businesses
- Commercial deck washing
- Graffiti removal
- Parking lot cleaning
Best SIMPSON Commercial Pressure Washers 2025
SIMPSON H3430 – Full Commercial Review
The SIMPSON H3430 is built purely for commercial environments.
Key Specifications
- PSI: 3500 PSI
- GPM: 3.0 GPM
- Pump Type: Triplex
- Engine: Honda commercial engine
- Hose Length: 50+ ft
Best Uses
- Fleet vehicle cleaning
- Industrial machinery
- Heavy dirt environments
- Construction site cleaning
Pros
- Built for continuous use
- Industrial-grade durability
- Stable pressure under long load
PSI and GPM Explained Simply
What is PSI?
PSI (Pounds per Square Inch) measures how strong the water pressure is.
- 1500–2000 PSI: Light cleaning
- 2500–3000 PSI: Medium cleaning
- 3000+ PSI: Heavy-duty cleaning
What is GPM?
GPM (Gallons Per Minute) measures the volume of water.
- Higher GPM means faster surface cleaning
- Lower GPM means water-efficient but slower cleaning
Pump Types Used in SIMPSON Pressure Washers
Axial Cam Pumps
- Used in the home series
- Cost-effective
- Suitable for moderate use
Triplex Plunger Pumps
- Used in prosumer and commercial models
- Longer lifespan
- Designed for long work cycles
Best SIMPSON Models by Cleaning Job
Best for Car Washing
Recommended: MegaShot 3000
- Strong but safe pressure
- Easy soap application
Best for Driveways
Recommended: Clean Machine 3200 or PowerShot 4200
Best for Decks and Patios
Recommended: MegaShot 3000 or ALH4240
Best for Commercial Jobs
Recommended: PowerShot PS4240 or H3430
Nozzle Types and Spray Patterns
SIMPSON includes professional accessories.
Common Nozzles
- 0° Red – Spot cleaning
- 15° Yellow – Heavy dirt
- 25° Green – General cleaning
- 40° White – Delicate surfaces
- Soap nozzle – Detergent spraying
Many models also support turbo nozzles and surface cleaners.
Real-World Performance in 2025
SIMPSON pressure washers perform extremely well in real-life use.
Performance Highlights
- Strong engine startup reliability
- Consistent water pressure
- Low vibration for gas models
- Handles dust, mud, and oil effectively
They perform very well in hot and dusty climates.
Maintenance Guide for SIMPSON Pressure Washers
Daily Maintenance
- Flush clean water after use
- Inspect hose connections
- Wipe external surfaces
Weekly Maintenance
- Clean the inlet filter
- Check nozzle tips
Monthly Maintenance
- Change pump oil (if triplex pump)
- Inspect seals and O-rings
- Clean or replace the air filter
Safety Features in SIMPSON Models
Built-In Safety Systems
- Thermal relief valves
- Trigger gun safety locks
- Reinforced high-pressure hoses
- Pressure relief systems
These features protect both the user and the machine.
Buying Guide: How to Choose the Best SIMPSON Pressure Washer
Important Buying Factors
- Type of cleaning job
- Required PSI and GPM
- Pump durability
- Portability requirements
- Storage space
- Budget
Frequently Asked Questions
Are SIMPSON pressure washers reliable?
Yes, they are known for strong build quality and commercial-grade parts.
Can SIMPSON machines be used for businesses?
Yes, many prosumer and commercial models are designed for business use.
Are spare parts available?
Yes, parts and accessories are widely available.
Final Verdict
SIMPSON pressure washers in 2025 remain one of the best choices for users who want serious cleaning power and long-term durability. The MegaShot series is ideal for homeowners, the Clean Machine range is perfect for heavier home use, and the PowerShot and commercial models deliver true industrial performance.
SIMPSON stands out for raw power, reliability, and professional-grade components.