Dewalt DXPW4240 4,200 PSI 4.0 GPM Gas Pressure Washer Review (Honda Engine)

Pressure washers are the machines that help you in cleaning your things in a professional manner. The Dewalt DXPW4240 is such a machine with 4200 PSI: an enough reason to have faith in the capabilities of this amazing pressure washer. However, the PSI should not be the only reason behind your decision of selection of a machine.

Dewalt DXPW4240
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First, you should know that this machine is a production wonder of the global leader of the high-end power tools manufacturer, Dewalt; so, quality has been blended right into every inch of this product. As the machine runs high-pressure pump so, it is powered with Honda engine.

There is a system designed in this machine, which stops the engine seizure by telling you whether the amount of oil in the engine is low or optimal. There is a compression reduction system installed in the machine, which ensures a smooth start of the machine.

For making the design more compact, the manufacturers have connected the engine directly to the pump. The 4.0 GPM delivery power of the pump shows that this machine is built to produce professional results.

The pump is designed with ceramic-coated pistons, which are extremely helpful for the people living in the areas with hard water. With the addition of a thermal relief valve, the temperature inside the pump remains low, and it works optimally in no matter how long it has been used. This machine shows the wonderful craftsmen-ship of the manufacturers.

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A quick specification overview of the Dewalt DXPW4240 pressure washer machine is covered in the following table.

Product Name

Dewalt DXPW4240 4,200 PSI 4.0 GPM Gas Pressure Washer with Honda Engine



Item Dimensions

37 x 23 x 28

Item Weight

141 lbs.


4200 PSI

Pump Capacity

4.0 GPM

Power Source

Gas Powered

Item Model Number


Number of Nozzles


Engine Brand


Pump Brand



01 year

Product Link

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Detailed Features of the Dewalt DXPW4240 4,200 PSI 4.0 GPM Gas Pressure Washer

A detail of the exciting features of this product is given below.

1) Compression Reduction Engine

The Dewalt DXPW4240 is a smooth starter. It is due to the presence of a compression reduction system, which allows almost no compression and helps you in starting the machine quickly. The amount of force, which is needed to start the machine, is abridged by the automatic mechanical decompression system.

2) Compact

If the machine is compared to a belt drive system, it will have a lesser amount of components, which help in keeping the design of the machine compact. Also, the engine of the machine is directly connected to the pump, which also insures fully functionality of the machine in a limited space.

3) Professional Results

You will be able to get professional results from this machine as it is designed to work in a professional manner. 4.0 GPM pumps are commonly seen in professional machines, and it is just an evidence of the robustness of this machine.

4) Great Option for Hard Water

The pistons present in the pump, are coated with a ceramic material. It is quite a viable option for the people who live in the areas where the water is hard.

5) Thermal Relief Valve

Another feature, which makes this machine an amazing option, is the presence of thermal relief valve. The function of this valve is to keep the temperature of the pump at lowest levels so that the machine could optimally work even if it is used rigorously.

6) Different Nozzles

For providing you with professional results, the machine comes with a single sprayer having five quick connect nozzle tips. These nozzle tips make it easy for you to select the maximum angle of spray. It ranges from 0 degrees to 40 degrees, and the fifth nozzle is used as a detergent applicator. You can use the 0-degree nozzle when you want the pressure concentrated strictly at one point; similarly, all the nozzles are designed as per your requirement.

7) Detergent Tube

The machine does not have a detergent tank with it, but you do not have to worry. To have low pressure, detergent application, a simple detergent siphoning tube comes with the machine, which can also have the work done in an efficient manner.

8) Pneumatic Tires

The features of this machine include two 13-inch pneumatic tires, which makes the mobility of machine quite easy. You can move the machine wherever you want with the help of these tires.

9) Steel Frame Body

The machine is made up of steel frame body so that it can withstand tough conditions. Construction of the frame is double, which makes it stronger.

10) Accessory Storage

There is an accessory storage provided for hose, nozzles, wand and spray gun within the premises of machine, which makes it convenient for users.

11) Professional Spray Gun

The spray gun provided with the machine is a professional type. It comes with the safety lock which insures that it is not activated accidently, hence assuring the safety of the users.

12) Dual Belt-drive System

The machine comes with the dual belt drive system. This system ensures that the pump and engine has a long life. It is quite an astonishing feature of this machine.

What Comes with It

The Dewalt DXPW4240 has following things when you open the box. Have a look!

1) Pressure Hose

There is a 50-foot long and 3/8-inch wide hose provided with the machine. It is provided so that you can get anything cleaned from the top of the roofs to the concrete floors. It depends on you how you use it. The machine will come handy in every situation.

2) Steel Wand

The Dewalt DXPW4240 comes with a steel wand. This steel wand is equipped with five number of quick connect nozzles which are provided to select the spray pattern you need. One of them is provided to utilize the option of detergent when using the machine.

3) User Manual

The box is equipped with user manual. This user manual is created to make sure that you can easily operate this machine and get maximum benefit out of it. Read it and enjoy working on your machine.

4) Warranty

The product comes with a one-year warranty.

Full Technical Specifications of the Dewalt DXPW4240 4,200 PSI 4.0 GPM Gas Pressure Washer with Honda Engine

A detailed analysis of the technical specifications of this gas power pressure is described as follows.

1) Dimensions

The machine is 37 inches long, 23 inches wide and 28 inches high. It shows that it is a medium sized machine and can be regarded as a compact one as well.

2) Weight

The machine weighs about 141 pounds.

3) Power Source

The Dewalt DXPW4240 is a gas-powered machine. You will need gas to get to work with it.

4) Pressure

The machine has a maximum pressure of 4200 pounds per square inch (PSI).

5) Pump

The pump provided with the machine contains the capacity of 4.0 GPM.

6) Engine

The Dewalt DXPW4240 is equipped with a Honda Engine. It is specially designed because it reduces the compression, which helps in smooth starting of the machine.

7) Warranty

The machine comes with a warranty of one year.

8) Dual Belt Drive System

The machine is furnished with a dual belt drive system. This system increases the life expectancy of pump and engine hence increases the durability of the machine.

Pros of Dewalt DXPW4240 4,200 PSI 4.0 GPM Gas Pressure Washer with Honda Engine

The machine is quite beneficial for everyday use. It can be proved by enlisting the advantages of this machine. Some of them are described below. You should have a look at them before reaching to any decision.

1) Efficient

It is an efficient and quite serious machine. The people who have used it are quite content with its performance. It offers 4200 PSI, which is huge power.

2) Easy Starter

One of the main advantages of this machine is that can start easily. Its compression reduction engine is designed to make it start quickly with one simple pull.

3) Tough Jobs

The pressure power of this machine suggests that it can handle tough jobs easily. You can do any cleaning job with this machine, and you will find professional results at the end.

4) Ceramic Coated Pistons

The pistons of the pump are specially coated with ceramic material so that the people living in areas with the access of hard water can use the machine without any hesitation. There is an adjustable unloader system in the pump as well which reduces pressure in the pump.

5) Thermal Relief Valve

You will not find thermal relief valve on many machines. It is quite an astonishing benefit of this machine, as thermal relief valve is installed to keep the temperature inside the pump to a low level, to maximize the safety of the machine and the user as well.

6) Large Hose

The machine comes with a large hose of 50 feet long. It allows the user to clean more area in less time hence increasing the advantages of the machine.

7) No Assembly Required

There is little or no assembly required in making this machine work, upon arrival. It has steel frame body, which is welded so that user do not have to go to extremes only to assemble the product. You just have to choose the nozzle, and the machine is good to perform the tasks.

8) Optional Spray Patterns

There is another advantage of this machine, i-e-, optional spray patterns. You can select the spray pattern according to your requirement by choosing the 0-degree to 40-degree options of spray patterns. There is another nozzle, which is the detergent nozzle. That nozzle can be used whenever you want to use detergent while cleaning.

Cons of Dewalt DXPW4240 4,200 PSI 4.0 GPM Gas Pressure Washer with Honda Engine

There are some disadvantages of this machine as well which are described below. Have a look!

1) No Detergent Tank

There is no detergent tank available; this is one of the slightest disadvantages of this machine. However, for the low-pressure detergent application, there is a detergent siphoning tube, which is provided with this machine to cut off the disadvantage of not having a detergent tank.

2) Not Compact Enough

As the machine comes in a welded frame so it cannot be folded. Resultantly, it requires some space for storage. That being said, the dimensions of the machine show that it will not take up all of your storage space.

3) Too Much Powerful

The machine is too powerful; you can cite that both in the pros and in cons of this machine. However, due to extreme pressure, you ought to be careful using this machine as it can prove itself as a disastrous apparatus quite easily.

Video Guide of Dewalt DXPW4240 Pressure Washer for Buyers

Dewalt DXPW4240 Pressure Washer Manual:

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Toughness is the guaranteed factor that you will get upon selection of Dewalt units. They are strong and durable. They are exceptionally designed so that they can meet the rigorous demands of the cleaning professionals. They provide professional results in less amount of time.

This Dewalt DXPW 4240 has a strong pressure of 4200 PSI, which can be applied to do any cleaning job you want. With the range of nozzles, this machine also gives you an edge by providing you with an option of selection of the proper pressure required to carry on the certain cleaning job.

With a compression reduction technology, its engine is designed to get started in a single pull so that you do not have to put in a lot of energy only in starting the machine. Just give it a single smooth swipe, and it will be ready to do the work.

Provision of a large hose of 50 ft., increases the significance of this machine as this large hose can carry out all cleaning jobs in an efficient manner and in less time. You do not have to move the machine everywhere; this large hose can suffice your requirements in an effective fashion.

By purchasing this machine, you will take a positive first step towards your clean surroundings as it is designed to provide professional results.

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Dewalt DXPW4240
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Hi, I'm James. The Chief Editor at I worked in Pressure Washer industry for a few years, and I thought to share my knowledge about pressure washer on our blog with my team.

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