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Simpson ALH3425 Aluminum Commercial Direct Drive Pressure Washer 3400 PSI

SKU: ALH3425-S / 60689
Quick Overview: 
  • Direct Drive Engine to Pump
  • 3400 PSI @ 2.5 GPM
  • HONDA® GX200 engine with low oil shutdown
  • AAA™ Industrial triplex plunger pump
  • Aircraft grade Aluminum Chassis
Simpson 3400 PSI Aluminum Pressure Washer
List price: $725
Free Shipping to lower US 48
Estimated Dates To Leave Warehouse: 

Feb. 25 - Feb. 26

In Stock


Built for professional grade performance, the SIMPSON® ALH3425 Aluminum Series is a 3500 PSI @ 2.5 GPM pressure washer that 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 ALH3425 is powered by a Honda engine and comes with a 35’ hose, an ergonomic spray gun and 5 Quick Connect nozzles.

Aluminum vs Steel

Looking for the steel version? We have access to it for phone orders, but before you call us, ask yourself whether you want a chassis that will rust or a chassis that will outlast the pump and motor? Water + Steel = Rust which means an Aluminum chassis is the way to go if you want one that will not only last but will stay great looking over the life of your pressure washer. If you really want the cheaper cart, feel free to call us for a comparable steel model. +1(800) 689-2098

Direct Drive vs Belt Drive

This commercial pressure washer is a Direct Drive unit that makes for a great space saver for the casual or occasional pressure washing projects. For more information, check out this great article that explains the differences between direct drive vs belt drive pressure washers.

  • 3 Year limited HONDA GX commercial engine warranty
  • 5 Year limited pump warranty
  • 10 Year limited frame warranty
  • 90 Day limited accessory warranty


  • MorFlex™ hose 5/16" x 35' is non-marring, kink and abrasion resistant and equipped with threaded M22 connection

  • Ergonomic spray gun designed for comfort and control

  • 5 Quick connect nozzle tips: 0°, 15°, 25°, 40° and Soap

  • Heavy duty aircraft grade aluminum frame with brushed extruded aluminum tubing

  • 10" Premium pneumatic tires








HONDA® GX200 engine with low oil shutdown


AAA™ Industrial triplex pump

Pump/Hose Connection

Threaded M22 connection


MorFlex™ Hose 5/16" x 35′

Gun/Hose Connection

Threaded M22 connection


16" Steel with quick connect and threaded M22 connection


0°, 15°, 25°, 40° and Soap


Heavy duty aircraft grade aluminum frame with brushed extruded aluminum tubing


10″ Premium pneumatic

Replacement Parts & Accessories

The following are a list of replacement or add-on parts for this product.

Shipping Weight
Weight: 86 lb
Shipping Dimensions
Dimensions: 30 in × 21 in × 30 in