Case IH 4,000 PSI 4.0 GPM Hot Water Gas Pressure Washer

When Cold Water Isn’t Enough—This Is the Power You Bring In.

Powered by a Honda GX390 commercial engine and equipped with a triplex pump, an external unloader, and a 330,000 BTU burner, this machine doesn’t just blast away surface dirt—it breaks down and emulsifies embedded grease and oil using high-pressure hot water. Its built-in soap injection system, 10-gallon burner fuel tank, and 1.61-gallon engine fuel capacity make it a powerful self-contained cleaning solution capable of operating independently for extended periods.

Key Features

• Max Pressure: 4,000 PSI

• Flow Rate: 4.0 GPM

• Engine: Honda GX390 – 389cc OHV, commercial-grade

• Pump: Industrial triplex plunger pump for maximum durability

• Unloader: External – offers better cooling, control, and service access

• Soap System: Built-in downstream chemical injector

• Burner Output: 330,000 BTU/hr – fast water heating for tough grime

• Burner Fuel Tank Capacity: 10 gallons (diesel, kerosene, or fuel oil)

• Burner Consumption Rate: 2.21 gallons per hour

• Engine Fuel Tank: 1.61 gallons – long runtime between fills

• Dimensions (LxWxH): 47" x 31" x 50"

• Shipping Weight: 580 lbs

• Net Weight: 530 lbs

Industrial-Grade Power for Industrial-Grade Cleaning

With 4,000 PSI of pressure and 4.0 GPM of flow, this unit generates a powerful 16,000 cleaning units—enough to handle the most intense cleaning tasks. Add in hot water capabilities and you’ve got a pressure washer that doesn’t just push dirt—it melts through grease, softens heavy soils, and lifts contaminants cold water systems leave behind.

Ideal for:

• Heavy-duty fleet and truck cleaning

• Construction equipment maintenance

• Greasy shop floors and industrial machinery

• Oil field and mining operations

• Food processing and sanitation

• Graffiti removal and deep surface restoration

Where grease, oils, or chemicals are present, hot water cleaning is essential—and this machine delivers unmatched thermal and mechanical cleaning power.

Honda GX390 Engine – Legendary Performance

The machine is powered by the Honda GX390, a 389cc OHV engine known for its exceptional durability, quiet operation, and low fuel consumption. It’s designed for long, continuous commercial operation, even under high loads.

Key engine features:

• OHV design for superior efficiency and cooler operation

• Precision camshaft for smoother power delivery

• High oil capacity and lubrication system for extended engine life

• 3-year commercial warranty for peace of mind

• 1.61-gallon fuel tank for hours of uninterrupted operation

When the job can’t wait—and failure isn’t an option—the Honda GX390 is the engine you want powering your equipment.

Triplex Pump + External Unloader = Maximum Control

This pressure washer is equipped with a commercial triplex plunger pump, engineered for superior pressure retention, longer lifespan, and consistent performance under daily operation. The external unloader provides better heat dissipation, easier servicing, and superior reliability—particularly important in hot water applications where internal temperatures can rise rapidly.

Benefits of the triplex pump with external unloader include:

• Longer service intervals and field serviceability

• Reduced risk of overheating

• Cleaner plumbing and easier component access

• Consistent, smooth spray patterns even under variable loads

If you plan to run this unit for hours daily or across multi-shift operations, the triplex/external unloader combo is essential for equipment longevity and reliability.

Massive Heating Power with 330,000 BTU Burner

The unit's 330,000 BTU diesel-fired burner heats water fast and maintains high temperatures throughout the cleaning cycle, even at full pressure and volume.

• Reaches hot water temperatures quickly—ideal for cutting grease and sanitizing

• 2.21 gallons per hour burner consumption rate for optimal fuel economy

• 10-gallon diesel tank ensures extended hot water operation without constant refilling

• Compatible with diesel, kerosene, or fuel oil

This burner is engineered for performance and durability, ensuring consistent, reliable water temperature even in cold climates or extended cleaning sessions.

Built-in Detergent Injection System

For those jobs that need more than just pressure and heat, this unit includes a built-in soap system designed for downstream chemical application. By injecting detergents after the pump, the system protects internal components from chemical corrosion and ensures consistent mixing for foamers or cleaning agents.

Simply attach the soaper nozzle, connect your detergent line, and you’re ready to apply your chosen cleaning solution—perfect for degreasing, sanitizing, or pre-washing large surfaces.

Industrial Frame and Design

Everything about this washer is built for real-world jobsite abuse:

• 47″ x 31″ x 50″ overall size offers a stable, balanced footprint

• Powder-coated steel frame resists corrosion and impact

• Designed with serviceability and maneuverability in mind

• Forklift-friendly base for shop or trailer transport

• Solid mounting brackets for tie-down during transport or trailer install

This is not a light-duty washer. At 530 lbs (net weight), it's built for industrial use, stationary setup, or heavy mobile applications.

The Case IH 4,000 PSI 4.0 GPM Hot Water Gas Pressure Washer is an elite performer—built for operations where high pressure alone isn’t enough. With the combined cleaning power of hot water, detergent, and high PSI, it delivers professional results on the most stubborn jobs.

From oil-soaked engines to shop floors and construction grime, this unit is ready to power through it all—efficiently, reliably, and without compromise.

Professional performance starts here. Trust Case IH for your toughest cleaning challenges.