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Simpson Water Blaster 4200 PSI Gas Pressure Washer, 4.0 GPM, Honda GX390

  • Based on 11 reviews
Condition: New
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Availability: Only 10 left in stock, order soon!
Fulfilled by IndustrialSupplies

Arrives Nov 1 – Nov 6
Order within 7 hours and 29 minutes
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Size: 4200 PSI


Features

  • Professional Performance: Easy-to-assemble and easy-to-start with its Honda GX390 commercial series engine, the Water Blaster Series power washer is great for contractors who specialize in deck cleaning, wood restoration, and all professional services
  • Power and Durability: A powerful, reliable, maintenance-free AAA industrial triplex plunger pump delivers 4200 PSI at 4.0 GPM and includes thermal relief to prevent overheating
  • Includes Quality Simpson Accessories: Monster 3/8-inch x 50-foot high-pressure hose is kink- and abrasion-resistant; 5 Quick connect nozzle tips: 0, 15, 25, 40 and Soap; 48-inch insulated grip steel wand; Professional spray gun with safety lock-out
  • Sturdy and Portable: The welded steel frame construction with a powder-coated finish provides durability and corrosion resistance; 13-inch premium pneumatic tires deliver ease of maneuverability across various terrain and uneven ground
  • Important Notes: Engines are tested in factory and may contain minimum residual fuel/oil or fuel odor; Fuel tank capacity: 6.4 quarts (1.6 gallons); Does not ship to California

Description

Created for commercial and industrial use, the SIMPSON Water Blaster series is simple to use and designed for the heaviest of cleaning. Perfect for paint preparation, professional cleaning services, graffiti removal, industrial job sites, and fleet maintenance. The heavy duty industrial triplex plunger pump is designed with ceramic pistons and thermal relief valve for long life. Its dual-belt system separates the engine and pump, preventing overheating and pump fatigue, resulting in greater efficiency and longer engine and pump life. From the Manufacturer Created for commercial and industrial use, the SIMPSON Water Blaster Series is simple to use and designed for the heaviest of cleaning. Perfect for paint preparation, professional cleaning services, graffiti removal, industrial jobsites, and fleet maintenance. Equipped with commercial series HONDA GX OHV engines that are built with high-quality components and designed for optimum performance in the harshest environments. Heavy duty industrial triplex plunger pump design with ceramic pistons and thermal relief valve for long life. Its dual-belt system separates the engine and pump, preventing overheating and pump fatigue, resulting in greater efficiency and longer engine and pump life. Please note that all of our pressure washers are 100% functionally tested in the factory and may contain minimum residual fuel or fuel odor. This is a new machine and a gas odor is normal and expected. Warranty Details: Engine - 3 Year Limited Commercial Warranty | Pump - 5 Year Limited Warranty | Frame - 10 Year Limited Warranty

Brand: SIMPSON


Power Source: Gasoline


Color: Black


Item Weight: 159 pounds


Hose Length: 50 feet


Specification Met: CARB, CETA


Product Dimensions: 46"L x 26"W x 25"H


Tank Volume: 1.6 gallons


Maximum Flow Rate: 4 gpm


Global Trade Identification Number: 41


Item Weight: 159 pounds


Hose Length: 50 feet


Item Dimensions L x W x H: 46"L x 26"W x 25"H


Tank Volume: 1.6 gallons


Power Source: Gasoline


Maximum Flow Rate: 4 gpm


Maximum Pressure: 4200 psi


Specification Met: CARB, CETA


Color: Black


Brand Name: SIMPSON


Model Number: 60205


Global Trade Identification Number: 41


UPC: 879399000041


Unit Count: 1 Count


Manufacturer Warranty Description: 3 Year Limited Commercial Warranty | Pump - 5 Year Limited Warranty | Frame - 10 Year Limited Warranty


Included Components: WaterBlaster 4200PSI,4.0GPM GPW GX390


Item Type Name: Gas Pressure Washer, 4.0 GPM Power Washer for Commercial Use, Honda GX390 Engine, 50-Foot Steel-Braided Hose, Water Blaster, 49-State (60205)


Manufacturer: SIMPSON


Manufacturer Part Number: WB4200


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 1 – Nov 6

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Great pressure washer!
Size: 4200 PSI
This power washer is well worth the money. It has a downstream chemical or product injector so the product never enters the pump. I filled the engine with the oil that was provided, put fuel in the tank, hooked the hose up and purged the air from the high pressure line and nozzle, and it started right up. Always read your instructions before using or you’ll end up destroying your pressure washer. Oh! There is also a little red plug in the pump the has to be removed (vent Plug) for the lubricating oil reservoir. Great product with plenty of power! ... show more
Reviewed in the United States on June 11, 2025 by John A. Heroux Jr.

  • pressure washer
Size: 4200 PSI
For the first week, this worked as described. We've had no issues and the high pressure really cuts working time.
Reviewed in the United States on November 2, 2012 by Patrick McGrory

  • Very powerful
Size: 4200 PSI
This Simpson 4200 PSI gas power washer is all the power washer anyone could reasonably want for general home use. The washer pump is belt driven by a Honda engine. It operates somewhat smoother and quieter than direct drive units. However, there will be a little more maintenance. The other consideration is the price. If the unit will be used frequently, then you could justify buying it. Otherwise, there are less powerful and lesser priced units by Simpson that will work for occasional home use. The seller did a good job packaging for delivery. It was sent crated on a pallet. ... show more
Reviewed in the United States on November 5, 2025 by MFK

  • Excellent piece of machinery.
Size: 4200 PSI
I have two diesel driven hot water pressure washers, both are skid mounted and each cost more than $10,000 so when this washer arrived yesterday I was immediately impressed by the way it has been put together. The belt drive system is very important for engine life. It is excellent, very powerful and the engine is not stressed at full pressure. I used it initially by dialing down the pressure and then winding it up after time. My only disappointment is the way the soap system works, it can only be used with a large tip, I am used to using mine at any pressure and with any tip. Have not tried it that way yet but will soon. It also does not have a on off tap for soap delivery. A pressure Hague would have been a nice addition, I will do that myself. It also did not come with an engine manual, I had to download that myself. You will not be disappointed with this machine, if you take care of it and do the servicing required. ... show more
Reviewed in the United States on October 23, 2018 by Marilyne Moore

  • Dead on arrival
Size: 4200 PSI
Got the machine, set it up and the recoil start was stuck. Called Simpson and they just said take it to a service center. No chance. Refund. Maybe it’s a good machine, don’t they claim they test them?...,
Reviewed in the United States on December 23, 2018 by AT

  • Per your request
Perfect machine, powerful, effective, and quality throughout. The Honda motor starts right up and the pump is a piece of artwork.
Reviewed in the United States on February 23, 2014 by d tappa

  • Nice Machine for $$
Size: 4200 PSI
This is a nice machine. Well built and commercial quality.
Reviewed in the United States on November 4, 2015 by treeforr

  • Five Stars
Size: 4200 PSI
Very powerful
Reviewed in the United States on April 14, 2017 by Chad C

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