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DeWalt DH4240B - Professional 4200 PSI (Gas-Cold Water) Belt-Drive Pressure Washer w/ Honda Engine for sale.

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DeWalt Professional 4200 PSI (Gas-Cold Water) Belt-Drive Pressure Washer w/ Honda Engine

(Based on expert analysis, manufacturer ratings and customer reviews)
4.3 out of 54.3 out of 54.3 out of 54.3 out of 54.3 out of 5
7 Reviews
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Ships Wednesday, Oct 26th

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  • Features
  • Specs
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  • 7
  • Articles
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  • Accessories
Water Pressure
Water Flow
Cleaning Speed
Cleaning Units
Honda GX

Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."

Honda GX390 Series 389CC Engine
Commercial grade engine is durable, starts easy, & runs quiet
3 year warranty through Honda service network

Dual Belt Drive
Redundant power transmission from engine to pump

Commercial Series Triplex Plunger Pump
Ceramic pistons run cooler, last longer, & can be rebuilt
Thermal relief valve protects the pump from overheating

Adjustable Pressure
4 GPM flow rate ensures efficient cleaning
Allows cleaning of many different surfaces

Professional Grade Spray Gun & Tips
5 quick connect spray nozzles: 0, 15, 25, 40 & soap

Made In USA Abrasion-Resistant High Pressure Hose
50 feet of 3/8" heavy duty, non-marring hose with quick connects
Polyurethane coated steel braid rated to 4500 PSI

Heavy Duty Frame With 13" Pneumatic Tires
10 gauge steel frame & sub frame w/ solid steel 5/8" welded axle

3-2-1 Limited Factory Warranty
3 years on engine, 2 years on pump, 1 year on frame

Need Help? Ask Our Power Equipment Experts.
Engine Brand
Honda GX
389 CC
Fuel Tank Size
6.4 quarts
Consumer Engine Warranty
3 Years
Commercial Engine Warranty
3 Years
Pump Brand
Pump Type
Triplex Plunger
Adjustable Pressure
Chemical Injection
Siphon Tube
Pump Consumer Warranty
2 Years
Pump Commercial Warranty
2 Years
Frame Type
2-Wheel Cart
Hose Storage
Hose Length
50 Feet
Hose Material
Wire Reinforced
Hose Diameter
3/8 Inch
Hose Connections
Spray Gun
Spray Gun Connection
Spray Gun Grade
Spray Gun Wand
Single Wand
Spray Tips
Quick Connect Tips (5)
Turbo Nozzle
Sold Separately
Made in USA
175 Pounds
Product Length
33 Inches
Product Width
27 Inches
Product Height
27 Inches
Consumer Warranty
1 Year
Commercial Warranty
1 Year
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  3 Questions
Q: Hi:
How much is the weight of this unit?
Dewalt 4200 PSI, belt drive. Thanks.

by Bob on June 30, 2012

A: This pressure washer model DH4240B weighs approximately 175 lbs.
by Brian, Product Expert
Q: Does the Dewalt DH4240B have a modular unloader with easy start valve?

Aslo, does it have a thermo sensor for low oil shutdown?

by David on February 12, 2012

A: This DeWalt model DH4240B does have a low oil shutdown sensor on the Honda GX engine. Actually all Honda GX engines have this feature along with a compression release for easy starting.

The pump on this machine does come with an unloader valve to allow the pump to start easier under pressure. However, it is always recommended to start a larger size pressure washer while you have the trigger gun squeezed.
by Brian, Product Expert
Q: I'm looking at the Dewalt DH4240 model (4200 PSI / 4 GPM) for a prosumer application.

What is the significance of a belt-drive model versus direct drive? Which is better and why?



by Tom Kieffer from Indiana on April 17, 2011

A: A belt driven machine is better than a shafted direct drive model. A belt driven pressure washer will absolutely last longer than a direct drive unit. The reason is that there is virtually no heat transferred from the engine to the pump since it is not directly mounted to the engine. Less heat transfer means less wear and tear on the internal seals of the pump. Heat is the #1 killer of pressure washer pump seals.

Also, a belt driven pump is a better quality pump overall than a direct drive version due to the fact that through the pulleys the pump will run at a lower rpm than the engine will. Belt driven pumps have less moving parts which means less part that can be worn down. If you are not going to use this pressure washer in a business application, the direct drive model would be sufficient for your use and would still last a long time.
by Brian, Product Expert
DeWalt DH4240B Reviews & Ratings
Overall Rating
4.3 out of 54.3 out of 54.3 out of 54.3 out of 54.3 out of 5
Has A Good Engine (1)
Misleading (1)
Durability (1)
Unreliable (1)
Low Quality (1)
50% of respondents would recommend this product to a friend
7 Reviews  Sort by 
Douglas G.
Albany, NY
Purchased from Power Equipment Direct
Purchased 7/4/16
Total Reviews
2 Reviews
Most Helpful Positive Review
5 out of 55 out of 55 out of 55 out of 55 out of 5
Dewalt Professional 4200 Psi (gas-cold Water) Belt-drive Pressur
I have a gravity-fed system, and the other DeWalt machines were unable to pull the water from my 350 gallon tank. So I had to use hose hook up to faucets! I called Pressure Washer Direct and inquired and they advised Belt Drive. PERFECT! Pulls water no problem! Thank you.
Douglas Recommends This DeWalt Product
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David S.
Houma, LA
Purchased from Power Equipment Direct
Purchased 4/7/14
Total Helpful Votes
10 Helpful Votes
1 out of 51 out of 51 out of 51 out of 51 out of 5
Misleading Pump - Failed After Less Than 20 Hours
Honda engine good quality but that is where it ends.

Less than 20 hours of use the pump failed. We had the unit less than a week of use and when we called Pressure Washers Direct we were told the closest service location was Hammond. Upon arrival we were informed that they were only the drop off location, it would be sent to another location for warranty work on the DeWalt brand pump.

We later learned that the pump was an off brand that had purchased the DeWalt name for that equipment... more
Pros: Has A Good Engine
Cons: Low Quality, Unreliable, Durability, Misleading
David Does Not Recommend This Product
Brian, the Pressure Washer Expert
Product Expert
The folks at Comet (the makers of the AAA pump) have taken a look at your pump, and denied your warranty claim since it's been misused. They say that the the outlet check valve was damaged, parts are missing, & the seals are showing signs of melting indicating that the pump may have been run dry.

I'll send you copies of all the reports under a separate cover.

Please be aware that Comet is a major pressure washer pump maker, not an off-brand that purchased DeWalt. The parent company of DeWalt Pressure Washers is FNA- a major corporation in the pressure washer world.
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Hanford, CA
Purchased from Power Equipment Direct
Purchased 7/6/11
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Unit Since 2011
I purchased my 4240B in 2011 and use it in a pool tile cleaning, abrasive blasting business. It runs for hours, is easy to move around despite it's being a heavy model and does what it says it will and more.

It is NOT a beginner model and probably too much for a normal home use machine, but great for long lasting, commercial use.

The only down side I've had is the stiff high pressure hose. I'm in and out of pools with it for hours at a time and it likes to bend in one direction...... more
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5 out of 55 out of 55 out of 55 out of 55 out of 5
Best Pressure Washer For Continued Use!
Ive had it for 3 years. I'm in the pressure washer cleaning business and I use it 14hrs a day almost non-stop. This thing never slows us down or loses power.

I've used many pressure washers and none have been as good as this one. This dual belt drive system certainly helps keep this thing going nonstop! Be careful for other DeWalt washers because they are not nearly as good as this one!
Was this review helpful?
5 out of 55 out of 55 out of 55 out of 55 out of 5
One Serious Pressure Washer!!!
i purchased a year ago. I use it 50hrs a week or more nonstop. This thing delivers and then some.

The Honda motor never slows down and the pressure is consistent throughout. Ive used many pressure washers but this one blows them all away Literally!!!

Easy transport and easy loading and unloading in the back of my truck.

I would definitely recommend!!!
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Fred B.
Waite Hill, OH
Purchased from Power Equipment Direct
Purchased 11/11/12
4 out of 54 out of 54 out of 54 out of 54 out of 5
Almost Perfect
My sprayer showed up on time. There was a dent in the gas tank upon arrival. The manual said that the pump was filled with oil, but there was none.

Once I filled the crankcase and pump with oil, everything went well. It starts easily and has plenty of power.
Brian, the Pressure Washer Expert
Product Expert
You can file a damage claim with the shipper for a short time after delivery; it helps if you noted the damage on the driver's delivery slip.
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Purchased from Power Equipment Direct
Purchased 7/3/12
5 out of 55 out of 55 out of 55 out of 55 out of 5
Guys Like It
Very nice, guys like it.
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Buy DeWalt Professional 4200 PSI (Gas-Cold Water) Belt-Drive Pressure Washer w/ Honda Engine at Power Equipment Direct. Read pressure washer reviews and pressure washer articles. Wide Selection of pressure washer accessories available, including General Pump Professional 4.0 Orifice Turbo Nozzle, Ladder Saver Long-Range Soap and Rinse Nozzle and Simpson Monster 50-Foot (3/8") 4500 PSI High Pressure Hose w/ Quick Connectors.

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