Best 4000 PSI Pressure Washer Reviews: Complete Buyer’s Guide

Are you looking for a 4000 PS Pressure Washer? Then read on for our full review of all the best models available with Pros & Cons of each.
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A pressure washer is a handy tool with plenty of uses. From clearing out gutters and cleaning walls to stripping old paint, pressure washers have so much versatility. Pressure washers come in models suitable for residential or commercial use.

Residential pressure washers are an excellent choice for helping you with your cleaning duties around the home, and they’ll leave your car in showroom condition after a wash. Most residential pressure washers offer PSI (Pounds per Square Inch) ratings of between 1,200 to 2,400-psi.

These machines don’t have the strength to handle heavy-duty cleaning jobs and running them for extended period results in damage to the washer.

For heavy-duty work, you’ll require the services of a professional pressure washer suitable for commercial use. These machines are far different from the models ideal for home use. A 4,000-psi pressure washer delivers some serious power, and using it to wash your car might end up with your denting the bodywork or lifting the paint.

A commercial-grade pressure washer suits tasks such as lifting stubborn oil stains from garage shop floors or stripping old paint from walls before you add a fresh coat.

In this review, we’ll look at the best 4,000-psi pressure washers, and make recommendations on the top models. If you’re a contractor or landscaper, then this review will help you choose the right machine to complement your tools.

Our Top Picks

Those readers that don’t have the time to go through all of the models in this review can rely on our top picks. We selected the three best 4,000-psi pressure washers and ranked them.

Top Pick: Simpson Cleaning ALH4240

SIMPSON Cleaning ALH4240 Aluminum Gas Pressure Washer Powered by Honda GX390, 4200 PSI @ 4.0 GPM, Red
  • Honda GX390 engine W/ oil alert
  • Cat industrial Triplex plunger pump
  • 3/8 in. X 50 ft. Monster hose is non-marring, kink and abrasion resistant and equipped w/ quick connect
  • Aircraft grade aluminum frame W/ Brushed extruded aluminum tubing
  • 13'' Premium pneumatic wheels. Wand-31 inch Steel with quick connect and threaded M22 connection

The Simpson ALH4240 is a powerful machine featuring a GX390 engine for high working pressures when cleaning. The unit comes with a long, flexible discharge hose, a robust frame, and wheels for portability. This model offers you the best balance between price and performance, earning it the top spot in this review.

Premium Pick: Pressure Pro E4040HC Heavy Duty

Pressure Pro E4040HC Heavy Duty Professional 4,000 PSI 4.0 GPM Honda Gas Powered Pressure Washer With CAT Pump
  • Powerful 13 Horsepower GX390 Honda Engine is easy to start, quiet and reliable
  • CAT Brand Triplex Plunger Pump helps run cooler
  • Thermo Sensor prevents overheating in bypass mode
  • Professional quality insulated gun and wand assembly with 5 quick connect nozzles and 50 feet of non-marking, steel re-enforced high pressure hose
  • CARB Compliant

For contractors and landscapers looking for the best premium 4,000-psi pressure washer, this model is your best option. The appliance comes with a built-in thermo-sensor to prevent the engine from overheating during use. You also get shock-absorbing tires, and an aircraft-grade frame to support the machine during operation.

Budget Pick: Briggs & Stratton Gas Pressure Washer

Briggs & Stratton ELITE4000 4000 MAX PSI at 4.0 GPM Gas Pressure Washer with Detergent Injection, 50-Foot High-Pressure Hose, and 5 Quick-Connect Nozzles
  • 4000 MAX PSI / 4.0 MAX GPM. Fuel Tank Capacity (Gallons) - 1.75
  • Powerful, durable and easy-to-maintain Briggs & Stratton 2100 Series OHV Engine fuels every outdoor cleaning project
  • Premium Annovi Reverberi Triplex Pump with adjustable pressure regulator lets you to fine tune the PSI to best fit each specific cleaning task
  • 5 quick-connect tips (0°, 15°, 25°,  40°, soap) provide predefined spray patterns & allow you to easily switch between a variety of cleaning tasks
  • Upgrade your power washing in seconds by simply siphoning cleaning solution into the water stream. Engine Displacement:420 cc

If you’re looking for the best budget buy, then this model has everything you need at an affordable price point. The adjustable pressure regulator lets you customize your cleaning, and it’s also suitable for use with cleaning detergents.

4,000-psi Pressure Washer Reviews

Here’s our full rundown of the best options on the market right now.

Simpson Cleaning ALH4240 – The Best Overall Model

Landscapers, contractors, and handymen looking for the best high-pressure washer at an affordable price, will love the Simpson ALH4204. This model wins our award for the best 4,000-psi pressure washer available. If you’re looking for a machine that can do any cleaning, then this model is your top choice.

The Simpson ALH4020 is a gas-powered model producing powerful jets of water at pressures of up to 4,200-psi. The machine offers excellent user control during use, and it’s powerful washing action strips away oil, grease, and dirt from any surface.

The Simpson ALH4020 gets its power from a robust GX390 Honda engine that provides exceptional fuel efficiency, allowing long run times between fills. This model suits contractors, landscapers, and handymen that are looking for a machine they can use every day without paying a hefty price tag or skimping on quality.

The powerful engine and gas tank sit on an aircraft-grade frame made from aluminum tubing. The frame offers the user stability during use, as well as easy portability around job sites. The frame also acts as a bumper. It protects the engine and other parts from damage in the event of a collision.

With the Simpson ALH4020, you get a 50-foot hose that makes it easy to reach any gutter or roof. The long hose is a bonus, as many other machines don’t offer lengths over 25-feet.

The frame sits on top of two 13-inch air-filled tires, allowing you to pull the machine over bumps and stones without the wheels jamming.

This high-pressure washer has plenty of power and suits the most demanding job sites. The machine offers a high-pressure output that’s ideal for industrial use. With an affordable price tag and excellent build quality, this high-pressure washer is our top choice in this review.

  • Powerful performance from the GX390 motor
  • Flexible hose with long length
  • Wheels for portability
  • Strong and durable frame
  • Features 5-interchangeable spray nozzles
  • Fast cleaning with a high-velocity water jet
  • Not suitable for residential use
  • Noisy

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Pressure Pro E4040HC Heavy Duty – The Best Premium Model

Those handymen, contractors, and landscapers that need the most powerful pressure washer on the market should take a look at the Pressure Pro E4040HC Heavy-Duty model. This washer lands our top spot for the best premium high-pressure washer available.

This model also features design and construction with a Honda GX390 motor for superior performance. The engine produces 13-hp, providing you with a powerful jet of water that’s strong enough to lift old paint off of walls and clean the deepest oil stains on porous floors.

The engine is built-to-last, and you can expect a long service life from this machine. This model also includes unique safety features to prevent operator malfunction. The built-in thermos-sensor detects the overheating of the engine during use. If the washer starts to run hot, then the thermos-sensor shuts the system down, allowing it to cool.

If you use a pressure washer for extended periods, then this thermos-sensor could save your machine from catastrophic engine failure during overheating.

The set also includes a high-pressure water hose with re-enforcement to prevent it from leaking or splitting at high operating pressures.

The motor and pressure washer components mount to an aircraft-grade frame that’s robust and durable. The framework uses high-quality mountings to minimize vibrations during use, making your operator experience that much more enjoyable. The sturdy frame also prevents damage from other machines or tools bumping into the unit.

It’s common for users to forget about the fuel level when working with a high-pressure washer. Unfortunately, if your machine runs out of fuel, it could damage the internal components of the engine. Fortunately, the Pressure Pro model includes a low-oil shutdown switch that kills the motor when the fuel tank runs dry, preventing damage to the machine.

Those handymen, contractors, and landscapers looking for the best pressure washer money can buy, should consider the Pressure Pro. This model has plenty of unique safety features and a powerful motor that delivers exceptional performance at pressures up to 4,200-psi.

This model is the most expensive high-pressure washer in this review. However, if you need a machine that will never let you down, this model is your top choice in this review.

  • Powerful operation
  • Thermo-sensor to stop overheating
  • Big tires for smooth movement
  • Aircraft-grade frame design and materials
  • High-pressure spray hose included
  • Sturdy and reliable on any job site
  • Not suitable for residential use
  • Expensive
  • noisy

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Briggs & Stratton Gas Pressure Washer – The Best Budget Model

If you’re looking for the best high-pressure washer on a budget, then you need to take a look at the Briggs & Stratton Gas Pressure Washer. This model wins our award for the best budget high-pressure washer available.

This high-quality machine features a Briggs and Stratton 2100 engine for its power plant. The engine has plenty of power, but it’s much lighter than the Honda GX390, which is a popular choice in other models.

The washer motor and tank come mounted on a frame connected to air-filled tires that make it easy to move this model between job sites over any type of terrain. We like that this machine is compatible with detergents, making it an excellent choice for power cleaning.

The Briggs & Stratton gas pressure washer operates at pressures of up to 4,000-psi, which is more than enough power for the toughest cleaning jobs.

Briggs & Stratton Gas Pressure Washer is a great all-round pressure washer. We like the adjustable pressure regulator that lets you scale down the pressure if you want to do residential work with the machine, such as wash your car.

  • Excellent price point
  • Powerful engine
  • Suitable for use with cleaning agents
  • Comes with a 50-foot hose
  • A robust frame and durable tires
  • Doesn’t come with any additional spray nozzles

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Generac 6565 Pressure Washer

The Generac 6565 pressure washer is a top-quality machine designed with powerful cleaning in mind. The 420-cc OHV motor provides pressures of up to 4,200-psi, making it a top contender for the best high-pressure washer.

You also get a 50-foot hose included in the package, making it easy to reach any gutter or roof. This model also features a triplex pump to increase operating pressures, providing plenty of power in your cleaning tasks.

The machine sits on a sturdy, robust frame mounted on air-filled tires for easy movement. The frame also protects against any bumps or knocks.

This compact unit provides landscapers, handymen, and contractors with a portable machine that’s easy to transport around job sites. Toss it in the back of your truck and take it anywhere you need to go.

  • Powerful engine and pressure pump
  • Powerful pump and engine
  • Comes with plenty of safety features
  • 50-foot high-pressure hose included
  • Compact design allows for easy storage
  • Not suitable for residential use
  • Noisy

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Simpson Cleaning PS4240 PowerShot

Simpson Cleaning gets a second mention in this review for the PowerShot model. This model uses the same GX390cc Honda motor as the previous model in this review, giving the machine plenty of power. The engine produces pressures of up to 4,200-psi, producing water jets that can take care of the toughest grime and grease on any surface.

The pressure washer sits on top of a welded steel frame, providing the machine with protection while making it portable.

You get a built-in Triplex pump for operation at very high pressures, without the fear of blowing seals on the machine.

We like the spray-gun type hose that comes with this model. The hose features an ergonomic grip that provides the user with total control during use.

Overall, the Simpson PowerShot is a more refined version of the ALH4020. This machine is an excellent choice for those contractors, landscapers, and handymen looking for a good entry-level machine that will last.

  • Welded steel frame for durability
  • Triplex plunger pump design
  • The ergonomic hose acts like a spray gun
  • compatible with all quick-connect nozzles
  • 13-inch air-filled tires
  • Not suitable for home use
  • Noisy
  • Somewhat expensive

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Champion 100386 Gas Pressure Washer

The Champion 100386 features a 389cc, single-cylinder OHV engine that produces pressures of up to 4,200-psi. Featuring an Annovi Reverberi triplex pump, this machine is suitable for heavy-duty use in the most demanding working conditions for contractors, landscapers, and handymen.

We like the spray hose that acts like a spray gun, giving you more control over the water when cleaning. The ergonomic trigger reduces operator fatigue while improving your aim.

The machine comes mounted on a frame with air-filled tires for easy transport, with user controls mounted on the handle for user-friendly operation.

We like the compact design of this machine. However, dynamite comes in small packages, and this machine is no different. Expect a powerful cleaning action that’s easy to control on any surface.

  • 50-foot high-pressure hose included
  • The hose acts like a spray gun
  • 4-foot hose for detergent
  • Triplex pump for excellent performance
  • Powerful 389cc motor
  • Not suitable for residential use
  • Noisy

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NorthStar 15782020 Pressure Washer

The NorthStar pressure washer Relies on the powerful GX392 Honda engine for its power. This machine is one of the few in this review that’s suitable for home use. The pressure washer produces pressures of up to 4,000-psi using its triplex pump.

The machine also comes with a durable steel frame and 15-inch air-filled tires for easy movement around the job site. The model also comes with several safety features that make it a great choice for first-time users of this equipment.

The long spray hose attaches to a spray gun that makes cleaning any surface a breeze.

Overall, the NorthStar pressure washer is a reliable machine. We like the vibration isolation that damps sound during operation.

  • Features direct-drive design
  • Suitable for general residential use
  • Long service life
  • Resistant to corrosion
  • Roll-cage frame for protection
  • Vibration isolation
  •  Expensive

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Other Best Selling Options

Bestseller No. 1
Champion Power Equipment 4200-PSI 4.0-GPM Commercial Duty Low Profile Gas Pressure Washer
  • POWERFUL: 4200 PSI with 4.0 GPM powered by a Champion 389cc engine
  • VERSATILE: Quick-connect gun, wand and five nozzles, a 50-foot commercial-grade steel braid reinforced, rubber high-pressure hose with Quick Connects plus a detergent hose for the detergent tank
  • HASSLE-FREE: Ergonomic comfort grip trigger gun reduces fatigue, plus onboard storage for the high-pressure hose, included hose storage strap, trigger gun and spray wand
  • QUALITY: AR Commercial-Grade Triplex Brass Head pump provides the power you need along with a forged brass manifold, providing corrosion resistance
  • CHAMPION SUPPORT: Includes 2-year limited warranty with FREE lifetime technical support from dedicated experts
SaleBestseller No. 2
SIMPSON Cleaning ALH4240 Aluminum Gas Pressure Washer Powered by Honda GX390, 4200 PSI @ 4.0 GPM, Red
  • Honda GX390 engine W/ oil alert
  • Cat industrial Triplex plunger pump
  • 3/8 in. X 50 ft. Monster hose is non-marring, kink and abrasion resistant and equipped w/ quick connect
  • Aircraft grade aluminum frame W/ Brushed extruded aluminum tubing
  • 13'' Premium pneumatic wheels. Wand-31 inch Steel with quick connect and threaded M22 connection
Bestseller No. 3
SIMPSON Cleaning PS4240 4200 PSI at 4.0 GPM Gas Pressure Washer Powered by HONDA GX270
  • HONDA GX390 engine w/ Oil Alert
  • AAA Industrial triplex plunger pump w/ PowerBoost Technology
  • 3/8 in. x 50 ft. Monster hose is kink and abrasion resistant w/ quick connect fitting
  • Welded steel construction frame
  • 13" Premium pneumatic wheels

Pressure Washer Buyer’s Guide

When selecting the best heavy-duty equipment, it’s always a good idea to research your choice before making your purchase. Industrial machines cost a pretty penny, and if you select the wrong model, it could be a costly mistake.

In this buyer’s guide, we’ll unpack everything you need to know about industrial pressure washers. We’ll look at the components of a good machine, and give you everything you need to know to make an informed purchase decision.

Engine Size

Many landscapers and contractors make the mistake of seeing cleaning power and pressure ratings as interchangeable terms. However, the reality is that they are very different units of measure.

All industrial pressure washers come with gas-powered motors. These engines provide the high-pressures needed during operation. There are different capacity motors available, but most come in versions offering up to 15-hp.

The engine determines the amount of pressure the machine produces, and a high-pressure washer requires plenty of power for challenging jobs like stripping old paint from exterior walls.

Great for cleaning patios and pavement
Great for cleaning patios and pavement


Industrial pressure washers come in various designs. When selecting your machine, look for a model offering an excellent balance during operation. Some washers also feature vibration-damping to minimize the vibration of the machine while in use.

Your pressure washer should feature a robust frame, telescopic handle, and inflatable tires for easy movement around the job site. Design is an important feature of the machine, and premium models manage to reduce the overall weight of the washer, while still retaining all of the power.

Spray Nozzles

The cleaning power of the machine comes from the motor. However, the nozzles are the critical component that harnesses this energy, producing the spray. Without the right nozzles, you can’t control all of the power from the machine, resulting in inefficient and ineffective cleaning.

A high-pressure cleaner that features a small nozzle produces a small water jet. That’s great for concentrating on one dirty area, but it’s terrible for wide coverage. Wide nozzles operating at lower pressures cover a wide area but lack the power needed for effective cleaning.

Your washer should include a range of pressure nozzles or compatibility with leading interchangeable nozzle brands.

Spray Hose

Most residential pressure sprayers come with a spray gun as part of the package. The pressure hose connects to the spray gun, providing the user with total control over the machine.

However, industrial pressure washers often don’t come with a spray gun. Instead, they feature a spray hose that acts like a spray gun. Some models feature ergonomic grips on the hopes for a user-friendly experience.

Some pray hoses do allow for the attachment of a spray gun. If a spray gun is an essential accessory for you, make sure its included with your model before you buy.

Spray hoses can vary in length from manufacturer to manufacturer. We suggest you choose a model that has a minimum hose length of 20-feet. A long hose allows you to work without dragging the machine along with you.

Gas Tank

Since high-pressure washers are industrial machines, they require the use of a gas-powered motor. The gas tank limits the run time of the machine between fills.

If you’re a contractor working on large job sites, and you need to carry the machine around, make sure you choose a model with a large gas tank for extended run time.


The frame of your pressure sprayer is the backbone of the machine. The frame holds the motor and gas tank, so it needs to carry a decent amount of weight. We recommend choosing a model that offers you a durable and robust frame that corrosion-resistant.

Some manufacturers offer aircraft-grade frames made from lightweight materials. These machines are easy to maneuver, and they provide a long service life.

If you choose a mild steel frame over a stainless steel version, make sure the frame has a protective powder coating to prevent rust from showing up if it gets wet. We recommend alloy frames – they’re lightweight, reliable, and durable.

The frame holds the entire assembly together, allowing you to move the machine around the job site. Therefore, it’s vital that you emphasize finding a lightweight frame if you intend to move the machine around.

Short work of dirty paths
Short work of dirty paths


Your industrial pressure sprayer comes attached to a frame. Most brands include a set of air-filled tires mounted to the frame for easy movement. Air-filled tires help you move the machine around on job sites, traversing any obstacles in your way with ease.

Avoid models that have plastic wheels as they will catch on gravel and lock up. Plastic wheels suit residential models that don’t need to maneuver around the job site. However, contractors and landscapers will benefit from the air-filled tires on professional models.

Safety Features

Industrial pressure washers work at high pressures, and that can be dangerous for the user. As a result, you need to ensure that your pressure washer comes with safety features to protect you when things go wrong.

Your pressure washer should include an engine kill-switch that prevents it from overheating. This switch breaks the circuit when it senses that the engine temperature is too high, preventing the motor from seizing.

A low-oil sensor can also provide you with protection from the engine overheating. Select a model that comes with built-in safety features, or you might regret it later.


Before you settle on your preferred high-pressure washer, check the listing for the accessories included with the kit. Some machines come with a spray gun and other handy accessories like replacement parts.


The handle of the machine is important if you want to carry it around job sites. Choose a model with a telescopic handle for easy reach and movement. Some models don’t include a handle, so if portability is a requirement for you, make sure you choose one that has a handle.


The weight of the machine is another factor to consider when selecting your ideal high-pressure washer. The heaviest part is the engine, and its cast-steel construction will account for 60% of the machine’s weight.

You also need to consider the size of the gas tank as well. When it’s empty, the tank is light, but you’ll need to take into account the weight of the gas when fully fueled.

Contractors and landscapers that rely on a portable machine should check the weight before they make their purchase.

User-Friendly Operation

First-time users of high-pressure washers should focus on selecting a model that offers user-friendly operation and functionality. Newbies to these machines might find them challenging to operate. The last thing you want is an experienced user handling these machines. The amount of pressure produced can lead to severe injury if things go wrong. It’s important to note that your pressure washer is essentially a water cannon, and hitting another person with the water jet when spraying, can cause a severe injury.

If you let the pressure build inside the machine to unsustainable levels, then there’s a chance it could explode, or it could blow all of the seals in the washer.

If this is your first high-pressure washer, then choose a model with less power and more features. A lower-powered machine will be easier for first-timers to handle, making it easy to manage. Entry-level washers are the best choice for newbies.

High-pressure washers with stronger motors have more features, but newbies night not require them.

Some machines come with one hose that does everything, while others come with special detergent hoses for cleaning. The complexity of the high-pressure washer is a concern for new users, and they’ll do better with selecting a simple model that offers basic functionality.


Some high-pressure washers, such as those suitable for car washes, don’t move around the workshop. They remain in a fixed position and have water hoses that connect to the machine.

Some individuals may require a high-pressure washer suitable for moving around job sites. If that’s the case, then it’s best to look at a model that comes with a frame and wheels for smooth movement.

Pressure Washer FAQ

If you’re still on the fence with choosing the best high-pressure washer for your needs, then hopefully, you’ll find the answers you need in these frequently asked questions.

What’s the difference between a high-pressure washer and a residential pressure washer?

Pressure washers that have ratings of 3,000-psi or over during operation are professional machines that fall into the category of “high-pressure” washers.

What kind of tasks suit a 4,000-psi pressure washer?

High-pressure washers can help with a variety of contracting and landscaping tasks. Use them to clean tough dirt, grime, and oil off of surfaces, or strip old paint from walls and floors.

Can I wash my car with one of these models?

Some models offer adjustable pressure, making them suitable for cleaning your car. some models also come with nozzles specifically designed for washing cars. However, your standard high-pressure washer is too powerful for this task. Washing your vehicle with one of these machines could dent the body panels, or lift the paintwork.

What kind of accessories do I need for my pressure washer?

A spray gun is a good choice if your machine doesn’t have one already. You can also select after-market nozzles specific to various cleaning functions.

Where can I buy a 4,000-psi pressure washer?

We recommend you buy your high-pressure washer from an online dealer like Amazon. Online dealers have a wide range, and they handle customer service better than the manufacturer.

Do I need to service my high-pressure washer?

Yes, the motor on your pressure washer operates similarly to your car. If you never service your car, you can expect catastrophic engine failure to occur in the future – it’s the same for the engine on your pressure washer.

Service your machine every 6-months to a year, depending on how much you use it. Take the pressure washer to a reputable dealer licensed to work on the model.


By now, you should have a good idea of which high-pressure sprayer meets your needs. However, if you’re still on the fence with your decision, why not rely on your top choices in this review?

We feel that the Simpson Cleaning ALH4240 offers you everything you need in a 4,000-psi pressure washer. This machine is a great choice for newbies around this equipment, and the value for money is exceptional.

If you’re an experienced user, then check out the Pressure Pro E4040HC Heavy Duty machine. This high-pressure washer comes with all the bells and whistles to make the most demanding jobs a breeze to finish.

Those individuals looking for the best value model for their money will do well with the Briggs & Stratton Gas Pressure Washer. This machine has everything you need in a high-pressure washer, at an affordable price.

Robin Watson

Robin owns his own Landscape Gardening company based in the UK and has over 10 years professional experience working outdoors, creating beautiful landscapes for his clients in the UK. He is also a keen garden-grower and maintains his own fruit and vegetable gardens. He also has a level 3 Certificate in Practical Horticulture from The Royal Horticultural Society and is currently working on his first book about gardening. Contact him at

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