Simpson ALH4240 Aluminum CAT 4200 PSI 4.0 GPM Honda Gas Pressure Washer New

  • Model: Simpson
  • SKU: ALH4240
Simpson Aluminum 4200 PSI Honda GX390 Gas Pressure Washer - FactoryPure - 1
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In Stock
Ships same day
If ordered by 3PM ET
  • Free Shipping Options Available
  • No Sales Tax *Except TX*
  • Price Match On Most Items
  • Manufacturer Direct
  • Exceptional Customer Service
  • Free Replacement Shipping
To place an order over the phone or for immediate assistance, please call (888) 978-4993. For after hours sales please call (888) 999-1522.
 Brand new in box & manufacturer direct
 2 year warranty on CAT pump
 3 year warranty on Honda engine
 10 year warranty on aluminum frame
 Sealed with all original accessories
 Authorized Simpson dealer
 Ships out same or next day


What's In the Box:

  • Pressure Washer
  • Hose
  • Gun with Dial-N-Wash (adjustable to between 900-4200 PSI)
  • Wand
  • 5 Quick connect nozzle tips
  • Detergent siphon tube with filter
  • Engine oil
  • Quick start set up guide
  • Owner's manual

We cannot accept any returns on pressure washers.  If there are issues with the unit, any repairs will be done at your nearest authorized Simpson repair center (at no charge to you).

Designed to meet the rigorous demands of the cleaning pro, the SIMPSON® Aluminum Series frame is crafted of 100% professional grade aluminum, making it lighter in weight than most steel frame designs. Perfect for contractors who specialize in deck cleaning, wood restoration, paint preparation, graffiti removal, and all other professional cleaning services. Equipped with commercial series OHV engines and industrial triplex plunger pumps that are built with high-quality components and designed for optimum performance in the harshest environments. Welded aircraft grade aluminum platform with brushed extruded aluminum tubing and pneumatic tires for mobility across most any surface. Pro-style quick connect spray wands and nozzles, with professional spray gun, allows users to operate with ease. High pressure hoses are non-marring, kink and abrasion resistant, and either polyester or steel-braided for exceptional strength and long-life. For those extra dirty jobs, drop the detergent siphoning tube into pressure washer safe detergent and attach the soap applicator nozzle.

  • HONDA® GX390 OHV commercial series engine with Oil Alert®
  • CAT Industrial Triplex Plunger Pump for dependable performance
  • 50' x 3/8" high pressure steel-braided hose is non-marring, kink and abrasion resistant, and equipped with Quick Connectors
  • Aircraft grade aluminum platform with brushed extruded aluminum tubing and 13"pneumatic tires
  • Pro-style spray wand with 5 quick connect nozzle tips - 0°, 15°, 25°, 40°, and soap applicator nozzle
  • Dial-N-Wash® spray gun to adjust pressure from 1000 PSI to MAX PSI with a simple twist - Safety lock-out to prevent gun from being accidentally activated
  • Convenient on-board accessory storage for spray gun/wand, high pressure hose, and nozzles
  • Downstream detergent injection system


ALH4240 Specs

Limited Warranty – Commercial Use 3 Year Honda GX Engine, 2 Year CAT Pump, 10 Years Frame Components, 90 Days Accessory.

Customer Reviews

Based on 25 reviews
Real Deal

Factory Pure is the real deal. They had the cheapest price for the machine that I wanted and they shipped fast! I was able to track my shipment every step of the way.

I'm just a retired fire truck mechanic this washer is great

I ordered this product it came within about 3 days I open the box it was in perfect shape that wasn't a scratch on it and nowhere I check the oil put a gallon of gas in it pull the handle one-time Softly pull it the second time hard it started right up I would recommend this product to anyone is one of the best washers I've ever owned

Great service

Amazing service, ordered at 2:00 pm and was on the dock for me to pick up the very next day at 10:00 am.


Simpson ALH4240 Aluminum CAT 4200 PSI 4.0 GPM Honda Gas Pressure Washer New

Great Washer

It was everything I expected. I am pleased.

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