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Model#: SMPN60688

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Brand new items;Full manufacturer warranty available
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New items with possible minor cosmetic damage; CPO 120 day money back guarantee
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Simpson 60688 Aluminum 4200 PSI 4.0 GPM Professional Gas Pressure Washer with CAT Triplex Pump

  • Simpson 60688 Aluminum 4200 PSI 4.0 GPM Professional Gas Pressure Washer with CAT Triplex Pump
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Freight Shipping »
(continental U.S.)

Freight Orders

Freight deliveries require a delivery time be scheduled and someone must be present at the time of delivery to inspect and sign for the merchandise. A representative from the freight carrier will call the phone number entered at checkout to schedule the delivery.

Liftgate Service

For freight deliveries, you have the option of adding a liftgate to your delivery. A liftgate is the device that lowers a product from the truck to ground level.

CPO recommends adding liftgate service for freight deliveries exceeding 100 lbs if you do not have a loading dock or fork lift at the delivery address. Additional charges may apply. The liftgate option will be presented during the checkout process.

Please note that liftgate service only ensures the product is removed from the truck. We recommend you have the additional help of two to four people to move the product to its desired location because drivers are not required to assist.

Requesting liftgate service after ordering may result in additional charges and delays.

Ships in 7-10 business days


The SIMPSON Aluminum Series Pressure Washer 4200 PSI at 4.0 GPM is built to perform. With a powerful Honda engine, reliable triplex pump and ultra lightweight aircraft grade aluminum frame, this gas Pressure Washer is great for construction, equipment upkeep, facility & fleet maintenance cleaning. The ALH4240 is powered by a Honda engine and comes with a 50 ft. hose, Dial-N-Wash adjustable spray gun and (5) Quick Connect nozzles.
  • 4200 PSI at 4.0 GPM
  • HONDA GX390 Engine with Low Oil Shutdown
  • CAT Pumps Industrial Triplex Plunger Pump
  • 3/8 in. x 50 ft. Monster hose is non-marring, kink- and abrasion-resistant and equipped with Quick Connect
  • Ergonomic Spray Gun designed for comfort and control
  • 5 Quick Connect Nozzle Tips: 0 Degrees, 15 Degrees, 25 Degrees, 40 Degrees, and Soap
  • Aluminum 4200 PSI 4.0 GPM Professional Gas Pressure Washer with CAT Triplex Pump - 60688
  • 3/8 in. x 50 ft. Monster Hose
  • Ergonomic Spray Gun
  • Spray Wand
  • (5) Quick Connect Nozzle Tips (0 Degrees, 15 Degrees, 25 Degrees, 40 Degrees, and Soap)
  • Detergent Siphon Tube with Filter
  • Engine Oil
  • Quick Start Set-Up Guide
  • Owner's Manual
Compliance and Restrictions
warning: Cancer and Reproductive Harm --


Series: Aluminum
Length: 38 in.
Width: 24 in.
Height: 26 in.
Weight: 111 lbs.
Built-in Detergent Tank: No
Case Included: No
Chemical Injection Method: Siphon Tube
Engine Make: Honda
Engine Type: GX390
Frame Type: 2-Wheel Aluminum Cart
Hose Connection: Threaded - M22
Hose Diameter: 3/8 in.
Hose Length: 50 ft.
Hose Material: Steel Braided
Max. Water Flow Rate (GPM): 4 GPM
Max. Water Pressure (PSI): 4200 PSI
Motor Type: Brushed
Nozzle Type: Quick Connect
Nozzles Included: Yes
Power Source: Gas
Pump Type: Triplex Plunger
Spray Gun Connection: Threaded - M22
Starter Type: Recoil
Wheel Size: 13 in.
Wheel Type: Pneumatic



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