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DeWalt DH4240B - Spec Breakdown

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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DeWalt DH4240B 4200PSI Gas Pressure WasherDeWalt DH4240B 4200PSI Gas Pressure WasherDeWalt DH4240B 4200PSI Gas Pressure WasherDeWalt DH4240B 4200PSI Gas Pressure Washer
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Set an alert for the DeWalt DH4240B - Current lowest price: $1,399.00
Price History
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Price history for the DeWalt DH4240B
Latest updates:
  • $1,399.00 - January 13, 2022
  • $1,444.00 - January 9, 2022
  • $1,399.00 - November 29, 2021
  • $1,444.00 - November 19, 2021
  • $1,399.00 - July 29, 2021
Data source: homedepot.com
Since: July 29, 2021
  • Highest Price: $1,444.00 - November 19, 2021
  • Lowest Price: $1,399.00 - July 29, 2021

Features and Specifications

General
FuelGas-Powered
HandlingWheelbarrow
WaterCold (100°F max.)
PSI4200
GPM4
Cleaning Units16800
Engine389 cc 11.7 HP Honda GX390 4-stroke OHV
PumpAAA Triplex
Other model numbers60446
Features
FrameWelded steel
Soap injectionVia siphon hose
Nozzles0°, 15°, 25°, 40°, Soap
Quick connect nozzlesYes
Onboard storageYes
Hose50 ft, ⌀3/8
Hose storageHooks
Misc
Dimensions
(L x W x H)
Approx. 45 x 28 x 25.5 in
Weight145 lbs
Pressure controlValve
Wheels2 wheels, ⌀13", pneumatic
Included accessoriesOil, nozzle cleaner, wand, spray gun, high pressure hose, soap hose, 5 nozzles
SecurityLow oil, trigger lock and thermal relief valve
EmissionsCARB, EPA
Warranty3 years

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

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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:

  • spot cleaning of hard, unpainted surfaces and high-reach cleaning
  • thorough cleaning of hard, paint-free surfaces
  • cleaning of painted and fragile surfaces
  • applying detergent and cleaning solutions

Its power characteristics and design, its main features and all its additional features are presented ahead.

Power

With an impressive 389 cc (11.7 hp) engine, its triplex pump delivers a pressure of 4200 PSI (roughly 70 times more than a standard garden hose) and a flow of up to 4 GPM (CETA-certified values), resulting in the DeWalt DH4240B's cleaning power of 16800 Cleaning Units.

This gas-powered pressure washer’s Honda GX390 engine is started by a traditional pull-start mechanism.

Gasoline storage is facilitated by a fuel tank with a maximum capacity of 1.6 gallon.

Design & Handling

The wheelbarrow design of the DeWalt DH4240B grants mobility and stability to the unit. The robust welded steel frame guarantees longevity of the assembly. The handle adds to the DH4240B convenience of transport.

The unit's weight of 145 lbs renders its carrying and transportation challenging, as it is far from lightweight. Its 389 cc Honda GX390 engine, the triplex pump and welded steel frame are mainly responsible for its heavy weight. However, the unit is mobile thanks to its two 13" pneumatic wheels, which add to its movability and allow it to be manipulated smoothly on the job.

Main Features

The DeWalt DH4240B's package includes a spray gun, a wand, a pressure hose, 5 nozzles and a detergent injection feature, with a more detailed description below.

  • Soap injection: While the device doesn't feature a soap tank, detergent supply is ensured by a siphon hose. The detergent is automatically added to the water when a soap nozzle is connected.
  • Pressure hose: A neat storage for the included 50 ft ⌀3/8" high-pressure hose (4500 PSI rating) is facilitated by a set of convenient hooks.
  • Spray gun and wand: A side hook enables you to easily store the included classic ergonomic spray gun and its wand. A rotating auxiliary side handle further improves both left-handed and right-handed users' comfort.
  • Nozzles: The table below shows you the 5 included nozzles, as well as the surfaces they're the most appropriate for.
 


15°

25°

40°

Soap
Concrete, brick, masonryUse with cautionSuitableSuitableSuitableSuitable
Siding, gutters, houseNot recommendedUse with cautionUse with cautionSuitableSuitable
Fencing, deck, patioNot recommendedUse with cautionUse with cautionSuitableSuitable
Lawn equipment, boat, RVNot recommendedUse with cautionUse with cautionUse with cautionSuitable

Note: The shape of the nozzles above is for illustration purposes only and may differ.
Red cross: Not recommended. Green check: Suitable. Orange check: Use with caution.

Other Features

  • Onboard storage: The DeWalt DH4240B's handy storage area lets you store nozzles and accessories, and thus, you’ll be always prepared and have everything necessary for the job at hand.
  • Safety: Safety of operation is enhanced by a thermal relief valve (which helps to prevent internal pump damage), a trigger lock mechanism (which prevents accidental operation) and a low oil protection.
  • Accessories: The DeWalt DH4240B comes with an owner's manual (opens in a new tab) and some basic documentation to get you quickly started. On top of that, you also get wand, spray gun, soap hose, pressure hose, nozzle cleaner and oil.
  • Emissions: The DeWalt DH4240B is EPA-approved and CARB-compliant. Therefore, the sale and purchase of this pressure washer is permitted in all of the 50 states, including California.

Product Videos

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.

  • With its 4200 PSI max pressure output, the DeWalt DH4240B is in the expected pressure range, for gas-powered units in the $1100-1500 price range. If the highest possible power of the water stream is your priority, one of the champions in this price range is the Lifan LFQ4515E-CA with 4500 PSI.
  • 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.
  • The DH4240B, which reaches up to 16800 Cleaning Units (PSI x GPM) is one of the more efficient, in comparison to its similarly priced counterparts. When it comes to the highest overall cleaning power in the current price range, one of the products at the very top currently is the Lifan LFQ4515E-CA and its 18000 Cleaning Units.

Price comparison

As you can see from this interactive chart, 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

STRENGTHS:
  • In the expected price range
  • Triplex pump
  • Honda engine
  • Designed to be stable
  • Good range of nozzles included
  • Onboard storage
  • Several security features
  • CARB-compliant
  • High GPM for the price
  • High CU for the price
AVERAGE SPECS:
  • Decent PSI for the price
WEAKNESSES:
  • No soap tank

Do you own the DeWalt DH4240B and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

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).

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