DeWalt DH4240B - 4200 PSI 4 GPM Gas Pressure Washer With Honda Engine
The DeWalt DH4240B is a gas-powered pressure washer offering a maximum water pressure of 4200 PSI and flow of 4 GPM. (Read full specs)
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Description
Zoom on the DeWalt DH4240B
The DeWalt DH4240B is a heavy duty, commercial pressure washer, that provides its users with an all-around versatile cleaning experience, and enables:
- pinpoint spot cleaning of hard, unpainted surfaces, accessing high areas, and successfully removing stubborn stains
- overall cleaning of hard surfaces, washing vehicles, and prepping surfaces for painting
- mild cleaning for delicate surfaces, and low-pressure cleaning for broader areas
- applying detergents or chemicals, and rinsing surfaces afterward
Ahead are presented its power characteristics and design, its main features and any other additional features.
Power
Fueled by an impressive 389cc (11.7 hp) engine, its triplex pump can generate a forceful pressure of 4200 PSI (roughly 70 times that of a standard garden hose) and a flow rate of up to 4 GPM (CETA-certified values). When these values are taken together, they yield a cleaning power of 16800 Cleaning Units.
Initiating the Honda GX390 engine of this gas pressure washer is achieved through a classic pull-start process.
Containing gasoline, the pressure washer's fuel tank can hold a maximum of 1.6 gallon.
Design & Handling
The wheelbarrow design of the DeWalt DH4240B offers enhanced mobility and stability, making it ideal for navigating uneven terrain and ensuring steady operation during heavy-duty cleaning tasks. The robust welded steel frame guarantees longevity of the assembly, providing stability and protection for internal components, even under demanding working conditions. The handle adds to the DH4240B convenience of transport.
Weighing in at 145 lbs, it's safe to say this unit isn't lightweight, which might pose difficulties for users when it comes to lifting and transporting, particularly over uneven surfaces. Its 389cc Honda GX390 engine, the triplex pump and welded steel frame are mainly responsible for its heavy weight. Nonetheless, the addition of two 13" pneumatic wheels simplifies maneuvering the DH4240B, even across rough ground.
Main Features
Along with the DeWalt DH4240B itself, the package also includes a spray gun, a wand, a pressure hose, 5 nozzles and a detergent injection feature, which are discussed in further detail below.
- Soap injection: While not equipped with a soap tank, the device maintains detergent supply through a siphon hose. Once a soap nozzle is connected, the pressure washer automatically blends the detergent with the water flow.
- Pressure hose: For easy organization, the included 50 ft ⌀3/8" high-pressure hose (4500 PSI rating) can be stored on the unit using a set of convenient hooks when it's not in use, ensuring a clutter-free workspace.
- Spray gun and wand: Both the classic ergonomic spray gun and its wand may be conveniently stored in a side hook. A rotating auxiliary side handle further improves both left-handed and right-handed users' comfort.
- Nozzles: Review the table below to learn about the 5 included nozzles and the surfaces they're recommended for.
0° | 15° | 25° | 40° | Soap | |
|---|---|---|---|---|---|
| Concrete, brick, masonry | |||||
| Siding, gutters, house | |||||
| Fencing, deck, patio | |||||
| Lawn equipment, boat, RV |
Important note: The shapes of the depicted nozzles serve for illustration purposes only and may vary. Symbols used include a for 'Not recommended,' a for 'Suitable,' and an for 'Use with caution.'
Other Features
- Onboard storage: The DeWalt DH4240B features a handy storage area, which allows you to neatly store nozzles and accessories and be always prepared by having everything needed at hand.
- Safety: Safety of operation is enhanced by a trigger lock mechanism (which prevents accidental operation), a thermal relief valve (which helps to prevent internal pump damage) and a low oil protection.
- Accessories: On top of an owner's manual (opens in a new tab) and the usual documentation to get you swiftly started, the DeWalt DH4240B also comes with nozzle cleaner, oil, spray gun, wand, pressure hose and soap hose.
The DeWalt DH4240B's performance versus other pressure washers
The following charts are provided to give you an idea of how the key specs of the DeWalt DH4240B compare to similarly priced pressure washers.
- Delivering a maximum pressure of 4200 PSI, the DeWalt DH4240B is one of the gas-powered products renowned for providing the highest water pressure output, in the $1450 to $1700 price range.
- With a water flow of up to 4 GPM (gallons per minute), this washer belongs to the best of the above-mentioned price range, as it can deliver a high volume of water.
- Boasting 16800 Cleaning Units (PSI X GPM), the DH4240B places itself as one of the most efficient choices in its specific price range.
Price comparison
As you can see from these interactive charts, when compared to other gas-powered washers between 16500 and 17000 Cleaning Units, the DeWalt DH4240B is on the average side of the price range.
Therefore, this pressure washer nicely fits in the expected budget for this kind of cleaning power.
The bottom line
- In the expected price range
- Triplex pump
- Honda engine
- Designed to be stable
- Good range of nozzles included
- Onboard storage
- Several security features
- High PSI for the price
- High GPM for the price
- High CU for the price
- No soap tank
Features and Specifications
| Fuel | Gas-Powered |
|---|---|
| Engine | 389cc 11.7 HP Honda GX390 4-stroke OHV |
| Pump | AAA Triplex |
| Water | Cold (100°F max.) |
| PSI | 4200 |
| GPM | 4 |
| Cleaning Units | 16800 |
| Pressure control | Valve |
| Frame | Welded steel |
|---|---|
| Handling | Wheelbarrow |
| Wheels | 2 wheels, ⌀13", pneumatic |
| Weight | 145 lbs |
| Dimensions | Approx. 45 x 28 x 25.5 in (L x W x H) |
| Hose storage | Hooks |
| Soap injection | Via siphon hose |
|---|---|
| Nozzles | 0°, 15°, 25°, 40°, Soap |
| Quick connect nozzles | Yes |
| Onboard storage | Yes |
| Hose | 50 ft, ⌀3/8 |
| Security | Low oil, trigger lock and thermal relief valve |
|---|---|
| Emissions | EPA |
| Included accessories | Oil, nozzle cleaner, wand, spray gun, high pressure hose, soap hose, 5 nozzles |
| Warranty | 3 years |
| Other model numbers | 60446 |
| UPC | 636893402340 |
We've taken extra care to research and verify each of the specifications above. That said, occasional mistakes or omissions are still possible. If you spot any missing or inaccurate information, feel free to suggest a correction so we can address it.
About DeWalt
With the invention of the first radial arm saw in 1922 by Raymond DeWalt, the company has since grown into one of the top names in power tools in the industry. Acquired by Black & Decker in 1960, the DeWALT brand has become a favorite of contractors, particularly in North America. It boasts seven manufacturing facilities in the U.S. Though known mainly for professional-grade corded-electric and battery-powered hand tools, the company has also begun to offer some outdoor power equipment as well, such as leaf blowers and string trimmers. DeWalt gas-powered washers are manufactured by FNA, and electric washers are manufactured by Stanley Black & Decker.
Warranty Information
The DeWalt DH4240B is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the unit.
For more information about the warranty of DeWalt pressure washers, please consult DeWalt's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-800-4-DEWALT (800-433-9258).


