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DeWalt DXPW4240 Review

DeWalt DXPW4240

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dewalt dxpw4240

Whether you have a big house and garden to keep looking clean and sparkling all year long, or own your own subcontracting business and have lots of commercial cleanup jobs to take care of, you want to be sure that you own a pressure washer that is going to be able to provide serious cleaning power at the touch of a button. While there are plenty of different pressure washers out there, not all of them have the kind of high cleaning power rating that the DeWalt DXPW4240 can offer. This is a pressure washer that is very well equipped to take on the toughest jobs and blast serious stains out of just about any surface you might come across. So whether you have a job on a work site that requires lots of power and durability, or just need a robust pressure washer for use around the house, the DeWalt DXPW4240 is a great option for you.

Review Summary

review summaryThe DeWalt DXPW4240 is exactly the kind of robust, heavy duty pressure washer you need to have when there are tough stains that need removal. It is a pressure washer that is built with commercial applications in mind, and because of that, it has a tough, durable body; a high performance engine made by one of the best names in the business; a powerful axial cam pump and the ability to deliver one of the highest cleaning power ratings you can find on a pressure washer in its class. With a higher PSI and flow rate than you can find on just about any commercial pressure washer of its size, there is no stain that the DeWalt DXPW4240 will not be able to make short work of.

This is the kind of power you need when you have serious commercial level jobs to take care of, but it can be extremely useful to have around the home as well. You never know when you are going to need some extra pressure to clean an oil stain from the garage floor, and the DeWalt DXPW4240 has he kind of power to do that as well as lots of other jobs. This is a very versatile, high performance machine.


review specificationsThe DeWalt DXPW4240 is a gas powered commercial pressure washer that weighs 129 pounds and has dimensions of 30 x 25 x 27 inches. It has a GX380 overhead valve engine made by Honda and an easily accessible axial cam pump that delivers a pressure of 4200 pounds per square inch.

Dimensions30 x 25 x 27
Engine ManufacturerHonda
EngineGX390 OHV
Power Rating16800
PumpEasy-access axial cam
Spray GunProfessional grade
Nozzle5 (0°, 15°, 25°, 40°, soap)
Hose5/16-inch x 25-foot
Hose MaterialHigh pressure poly-braided
Wheels10-inch pneumatic
Weight129 pounds
Warranty1 year

Along with that PSI, the DeWalt DXPW4240 has a flow rate of 4 gallons per minute, which gives it a total cleaning power rating of 16800. It delivers a cold water spray through its professional grade spray gun, which has five nozzles to provide extra pressure options. It has a poly-braided 25 foot long hose and 10-inch pneumatic wheels.


review descriptionAs soon as you take one look at the DeWalt DXPW4240, you are going to know that this is one commercial pressure washer that lives up to its designation. This pressure washer is a workhorse, and it is clearly well equipped to take on the biggest and toughest cleanup jobs out there, whether you are using it on a commercial job site or around the home. While it is not the biggest pressure washer out there, it certainly isn’t small, either, and along with its weight, it’s clear that this is a solidly built, robust pressure washer that means business.

But it is not just the size and weight that make this a tough machine. The DeWalt DXPW4240 is durably built, and its body and frame are made from durable, high-impact steel that can stand up to the rigors of the modern job site. It has tough pneumatic wheels that will remain pressurized longer. And it has a high pressure poly-braided hose that will not crack or develop leaks – even if you run over it with your truck. That is the kind of reliable durability you need on a commercial pressure washer, no matter where you intend to use it.

The DeWalt DXPW4240 provides a lot of power, as well. With one of the best small engines you can find on a commercial pressure washer today, and an easy-access axial cam pump, the DeWalt DXPW4240 is able to provide a cleaning power rating that is well above average for its class. And because it has five nozzle options, you know that you will always be able to select the pressure that is perfect for whatever job you might need to use it for. The DeWalt DXPW4240 is an all-around outstanding pressure washer that has everything you need to take care of big jobs easily.


review prosThere are a lot of reasons why the DeWalt DXPW4240 is one of the best commercial pressure washers on the market today, but I was able to narrow the list down to its top five Pros. These are all important categories for any pressure washer, and the DeWalt DXPW4240 was consistently able to offer the best product specs in all of them. This is an outstanding pressure washer that really goes above and beyond in every category.

  1. Outstanding Power Rating : The DeWalt DXPW4240 has one of the highest cleaning power ratings you can find on a commercial pressure washer – and it is well above anything you could find on a residential model. With a rating of over ten thousand, you can be certain that you will be able to rely on the DeWalt DXPW4240 to have enough power to take care of the most serious stains out there without breaking a sweat. That’s real power.
  2. Professional-grade Durability : Because the DeWalt DXPW4240 is a pressure washer designed for commercial use, it is constructed from parts that have professional-grade durability. That means that the manufacturer used welded steel where others would have used stamped steel. They made the hose poly-braided instead of just PVC plastic. They made the frame and body of the DeWalt DXPW4240 from high-impact materials that can stand up to the rigors of use on a commercial job site without breaking down.
  3. Five nozzle options : With five nozzle options, you can be sure that you will be able to use exactly the right pressure setting for whatever job you have to do. This is one of the features that makes the DeWalt DXPW4240 a great option for home use as well as commercial applications. It has a very high cleaning power rating, but if you have a more delicate job to take care of, you can select a lower pressure that is perfect for that.
  4. Great engine : All of the outstanding power and performance the DeWalt DXPW4240 has to offer would not be possible if it were not backed up by a high quality engine. And it is. With the Honda GX390 OHV under the hood, the DeWalt DXPW4240 has all of the power you need for big jobs. Not only that, but because it’s made by Honda, you know you can count on the engine to provide reliable power for many years.
  5. Cuts through tough stains : When you are faced with a tough stain, you want to have a pressure washer that can cut right through it on the first or second pass. Otherwise, you are left spending almost as much time cleaning it with the machine that you would by hand. The DeWalt DXPW4240 can cut through the toughest stains easily, removing them from just about any surface more quickly than you could with almost any other model out there.

In every single area that is of major importance to the performance and reliability of a pressure washer, the DeWalt DXPW4240 comes through in a big way. In terms of its design, durable build, high cleaning power rating, and quality of parts, the DeWalt DXPW4240 simply blows the competition away. This is a pressure washer that has everything you need to tackle the toughest jobs more quickly and efficiently than ever before. It’s one solid pressure washer.


review consWhile the DeWalt DXPW4240 is really one of the best commercial pressure washers you can find on the market today, I think it is important to cover the few areas in which it is not quite perfect. To be clear, I could not find anything wrong with it that took away from its overall power or performance. But I think it’s important to cover the few minor drawbacks it does present, just to be completely thorough.

  1. Not CARB compliant : You are going to be hard pressed to find a commercial pressure washer that has the kind of power rating and PSI you need if you are only looking for those machines that are CARB compliant. In fact, it is really hard to find any gas powered pressure washer, commercial or otherwise, that is compliant with those strict standards. This is not a huge problem – unless you live in California, where you can’t buy the DeWalt DXPW4240.
  2. It’s big and heavy : The DeWalt DXPW4240 is not a compact or lightweight machine. It weighs more than a hundred pounds, and its overall dimensions are not particularly small, either. Still, you should have no problem finding room for it in the back of your work truck, although lifting it in is definitely going to take some effort. But maneuvering it around the job site should not be too difficult in spite of its weight, because it has such big wheels.
  3. One year warranty : The DeWalt DXPW4240 only comes with a one year warranty, which is not particularly long: the industry standard on most commercial appliances is typically twice as long. That being said, the DeWalt DXPW4240 has an extremely high quality engine, durable parts, and a great design. This should give it more than enough longevity to continue performing very well many years after it is past its warranty – so this should not really be much of a problem.
  4. Produces a lot of exhaust : When you are dealing with an overhead valve engine like the DeWalt DXPW4240 has, the advantage is that you are getting more power from a compact design. But the drawback is that overhead valve engines tend to produce a lot of exhaust. That is not really a problem, but it does mean that if you are using the DeWalt DXPW4240 in an enclosed space, you have to make sure that it is well ventilated to prevent health risks.
  5. Cold water only : On a big, heavy duty commercial pressure washer like the DeWalt DXPW4240, you would almost expect to find that it has a hot water option. Often a high pressure hot water spray can cut through tough stains much more quickly than a cold water spray can, and they are invaluable for dealing with stains that are not water soluble as well. Still, with its high cleaning power rating, this should not present too much of a problem.

As you can see, those few areas in which the DeWalt DXPW4240 is not entirely perfect are not really the kind of problems that would be able to take away in any meaningful way from all of the outstanding features it does have. Overall, this is a commercial pressure washer that has plenty of ability, quality design and parts, and the kind of high cleaning power rating that is going to make tough jobs much easier to take care of.

Product Comparison

review comparisonNow that you understand where the DeWalt DXPW4240 has some of the most outstanding features in its product class, and know what to expect in terms of areas in which it might fall short, you probably are ready to do some comparison shopping. This is the best way to figure out whether a particular pressure washer is the best one for you. That’s because it goes beyond individual Pros and Cons and instead looks at how different machines stack up to one another.

 DeWalt DXPW4240DeWalt
Simpson PS4240-SSimpson
Generac 6022Generac
Dimensions30 x 25 x 2725 x 30 x 2717.6 x 27.1 x 20.6
Engine ManufacturerHondaHondaGenerac
EngineGX390 OHVGX390 OHV196cc OHV
Power Rating16800168006210
PumpEasy-access axial camAxial camEasy-access axial cam
Spray GunProfessional gradeProfessional gradeErgonomic
Nozzle5 (0°, 15°, 25°, 40°, soap)5 (0°, 15°, 25°, 40°, soap)4 (0°, 25°, 40°, soap)
Hose5/16-inch x 25-foot1/4-inch x 25-foot1/4-inch x 25-foot
Hose MaterialHigh pressure poly-braidedSteel reinforced,
non-marring rubber
Wheels10-inch pneumatic10-inch pneumatic10-inch solid
Weight129 pounds142 pounds83 pounds
Warranty1 year1 year2 years

As you can see, the DeWalt DXPW4240 has one of the highest cleaning power ratings available on a commercial pressure washer today – and it’s more than twice that of one of the best residential pressure washers. While the other commercial pressure washer is comparable in most power-related product specs, the DeWalt DXPW4240 manages to provide all that power while being smaller and more lightweight. That is a good indication that the DeWalt DXPW4240 is the more well-designed of the two machines.


review conclusionCompared to other pressure washers, the DeWalt DXPW4240 consistently ranks as one of the best in most product specs. I’m sure you will agree that this is one heck of a commercial pressure washer. But before you decide to buy it, let’s take one more look at its Pros and Cons lists, just to make sure it’s the right one for you.

Conclusion Pros

  1. Outstanding Power Rating.
  2. Professional-grade Durability.
  3. Five nozzle options.
  4. Great engine.
  5. Cuts through tough stains.

With one of the highest cleaning power ratings you can find on any pressure washer out there, a solid engine under the hood, lots of pressure options, and seriously durable parts, the DeWalt DXPW4240 is almost the perfect pressure washer. You can tackle lots of different jobs with it and remain confident that it will hold up to tough conditions for many years of use.

Conclusion Cons

  1. Not CARB compliant.
  2. It’s big and heavy.
  3. One year warranty.
  4. Produces a lot of exhaust.
  5. Cold water only.

The few areas in which the DeWalt DXPW4240 is not entirely perfect really are not serious issues at all, as far as I am concerned. You would expect it to be big and heavy and produce enough exhaust that it won’t comply with CARB regulations. While a hot water option would be nice, that’s really the only area in which the DeWalt DXPW4240 is lacking.

Final Word

A powerful, high performance pressure washer like the DeWalt DXPW4240 does not come along often, and when you get the chance to own one, you should jump at it. For the price, this is one of the best commercial pressure washers out there. It has everything you need to be prepared to tackle tough jobs quickly and efficiently. With one of the highest cleaning power ratings, a high-performance engine under the hood, and durable parts and design, this is the perfect pressure washer for commercial or home use.

That is not just due to its high PSI and flow rate – the DeWalt DXPW4240 is also a thoughtfully designed pressure washer with plenty of options for different pressures. That means you will be able to use it on tough, heavy duty stains just as well as you can use it for gently cleaning windows or other delicate surfaces. This is one well-rounded pressure washer, and it’s great for lots of different applications.

Best Price

review pricesWhile the DeWalt DXPW4240 is a bit more expensive than the average residential pressure washer, when it comes to comparing it to other commercial models, it is actually quite affordable. That is another reason why, if you’re looking for a heavy duty pressure washer for residential use, the DeWalt DXPW4240 is a great option. But it also makes it a great option for contractors as well, who usually have pretty thin margins on their bottom lines. Either way, the DeWalt DXPW4240 is a very affordable, reasonably priced pressure washer, especially when you consider everything it has to offer in terms of power and performance.

DeWalt DXPW4240

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