Simpson Cleaning 3400 PSI Gas Pressure Washer, 2.5 GPM Power Washer for Commercial Use, Honda GX200 Engine, 25-Foot Hose, Aluminum Series, 49-State (ALH3228-S)

The Simpson ALH3228-S gas pressure washer brings commercial power to heavy cleaning tasks. Designed for professional services like deck cleaning and wood restoration, this machine tackles stubborn buildup on hard surfaces. It combines an easy-to-assemble design with simple starting, making it practical for daily jobsite use.

At the core of the power washer is a Honda GX200 commercial series engine paired with a CAT Industrial triplex plunger pump. This system outputs up to 3400 PSI at 2.5 GPM to blast away deep grime. To maintain longevity during long cleaning sessions, the pump features thermal relief protection to prevent overheating. Hose attachments are easy to manage using the standard quick-connect system.

The chassis features an aircraft grade aluminum platform made from brushed extruded aluminum tubing, offering strength without vulnerable rust points. Rolling the unit across uneven ground, dirt, or debris is simple thanks to the 10-inch premium pneumatic tires. The included accessory kit contains a 16-inch steel wand, a spray gun with a safety lock-out, five quick connect nozzles (0°, 15°, 25°, 40°, and Soap), and a Monster 5/16-inch by 25-foot high-pressure hose engineered to resist kinking and abrasion.

A few practical trade-offs come with this design. The unit carries a 49-State compliance rating, which means it cannot be sold or shipped to California. During maintenance, users must keep the maximum fuel level 1/2 inch below the bottom of the filler neck to avoid fuel spillage. Additionally, the 25-foot hose length provides good standard reach, though wider properties will require wheeling the frame closer to the cleaning area.

Verdict: The Simpson ALH3228-S is ideal for contractors and property managers needing consistent high pressure output and rugged portability. Its Honda engine and triplex pump setup deliver solid commercial performance for tough exterior cleaning projects.

• Engine: Honda GX200 commercial series
• Pump: CAT Industrial triplex plunger pump with thermal relief protection
• Pressure Rating: 3400 PSI
• Flow Rate: 2.5 GPM
• Frame Material: Aircraft grade brushed extruded aluminum
• Tires: 10-inch premium pneumatic tires
• Hose: Monster 5/16-inch x 25-foot kink- and abrasion-resistant hose
• Wand & Spray Gun: 16-inch steel wand with professional spray gun and safety lock-out
• Included Nozzles: 5 quick connect tips (0°, 15°, 25°, 40°, Soap)
• Compliance: 49-State compliant

A great fit if you:

• Need high pressure output of 3400 PSI for professional deck cleaning, wood restoration, or jobsite work
• Want a reliable Honda GX200 commercial engine paired with a CAT triplex pump
• Require a corrosion resistant aluminum frame with pneumatic tires for rough, uneven terrain

Consider something else if you:

• Reside in California, because this pressure washer is restricted to 49-State compliance
• Prefer a basic electric power washer without gas fuel requirements or engine maintenance

Is this pressure washer available in California?
No. This model carries a 49-State compliance rating, which means it cannot be sold, shipped, or operated within California.

What spray nozzles and wand accessories come with this unit?
The pressure washer includes a 16-inch steel wand, a professional spray gun with safety lock-out, and five quick connect nozzle tips: 0°, 15°, 25°, 40°, and Soap.

What precautions should be taken when filling the fuel tank?
When adding fuel, ensure you keep the maximum fuel level 1/2 inch below the bottom of the filler neck to prevent accidental spillage during use or transport.

What features protect the pump during heavy operation?
The unit uses a CAT Industrial triplex plunger pump equipped with built-in thermal relief protection, which guards against overheating during operation while providing 3400 PSI at 2.5 GPM.