Simpson Aluminum ALH4240 4,200 PSI 4 GPM Cold Water Gas Professional Pressure Washer

Simpson Aluminum ALH4240, 4,200 PSI Professional Pressure Washer

The Simpson Aluminum ALH4240 delivers 4,200 PSI at 4.0 GPM from a Honda GX390 engine, making it one of the highest-output units in the Aluminum series. That pressure and flow rate combination strips concrete coatings, removes industrial grease, and cleans heavy equipment faster than lower-PSI models, reducing labor hours on large commercial jobs.

Honda GX390 Engine and CAT Triplex Pump

The Honda GX390 OHV commercial series engine provides the torque needed to drive the CAT industrial triplex plunger pump at full output for extended periods. An oil alert system protects the engine during long work days. The CAT triplex pump runs cooler than axial designs and can be rebuilt when it reaches the end of its service life, giving the ALH4240 a longer usable lifespan.

Professional-Grade Aluminum Frame

Despite the higher output, the ALH4240 keeps the lightweight aluminum frame that defines the series. Adjustable pressure from 1,000 PSI to max lets operators dial back output for lighter tasks without switching machines. This lets crews move a 4,200 PSI machine as easily as most contractors handle a 3,000 PSI steel-frame unit.

Features

• Honda GX390 OHV Commercial Series Engine With Oil Alert
• Starts easy, runs smoothly, and delivers high output; engine oil is included
• Delivers up to 4,200 PSI to handle large jobs efficiently
• CAT Industrial Triplex Plunger Pump
• Triplex pumps run cooler and last longer than axial pumps; can be rebuilt
• Develops up to 4 gallons per minute to clean quickly
• Aircraft Grade Aluminum Platform
• Brushed extruded aluminum tubing is strong and lightweight
• Adjust pressure from 1,000 PSI to MAX PSI with a simple twist
• Safety lock-out to prevent gun from being accidentally activated
• Pro-Style Spray Wand With 5 Quick Connect Nozzle Tips
• 0 Degrees, 15 Degrees, 25 Degrees, 40 Degrees, and soap applicator nozzles shape the spray
• 3/8 x 50' High Pressure Steel-Braided Hose
• Non-marring, kink and abrasion resistant hose lets you work in a wide area
• On-Board Accessory Storage
• Keeps hose, spray wand and nozzles organized
• Siphon Tube Detergent Injection
• Lets you use a wide variety of pressure washer-safe cleaners

Specifications

What's In the Box

• Simpson Professional 4,200 PSI (Gas - Cold Water) Aluminum Frame Pressure Washer w/ Honda Engine and CAT Pump - ALH4240

Manuals and Documents

• Owner's Manual
• Replacement Parts List