Mi-T-M CA-4004-1MCH Aluminum Pressure Washer – 4000 PSI, 4.0 GPM, Honda GX390

CA-4004-1MCH Gas Pressure Washer — CA Aluminum Series 4000 PSI, 4.0 GPM with CAT Pump

The CA-4004-1MCH produces 4000 PSI at 4.0 GPM — 16,000 cleaning units — from a 389cc Honda GX390 OHV engine paired with a CAT crankshaft pump on Mi-T-M’s 128-lb aluminum frame. The 1MCH is the highest-output configuration in the CA Aluminum Series and the highest-output variant on the CA-4004 frame: at 16,000 CU it exceeds the standard CA-4004-1MAH (14,000 CU) by 14% through higher flow rather than higher pressure. The integrated external bypass system is standard on the CAT pump configuration, providing continuous pump protection without requiring a separately ordered accessory. ETL listed for US commercial use.

CA-4004-1MCH CAT Pump and High-Flow Configuration

The CAT crankshaft pump supports the 4.0 GPM flow rate that exceeds the AR pump’s standard configuration on the CA-4004-1MAH/K/M/V variants. CAT pumps are a recognized commercial-duty brand in the pressure washer industry, specified for sustained high-flow applications. The 16,000 CU output is the equivalent of applying 4000 PSI of cleaning pressure across 14% more surface area per pass compared to the 3.5 GPM configurations.

• 4000 PSI at 4.0 GPM (16,000 CU) — highest output in the CA Aluminum Series; 14% more than the CA-4004-1MAH at 3.5 GPM; handles large surface areas faster
• 389cc Honda GX390 OHV engine — Honda commercial engine providing torque for 4.0 GPM at 4000 PSI sustained load
• CAT crankshaft pump with integrated external bypass — CAT pump rated for sustained high-flow commercial use; external bypass included, not a separate accessory
• 128-lb corrosion-resistant aluminum frame, 13-in flat-free tires — 3 lbs more than AR pump variants; still lighter than steel-frame JP-4004 at 142 lbs
• ETL listed, vibration isolation plate — ETL certification for commercial procurement; vibration dampening reduces pump seal wear
• 50-ft × 3/8-in hose, 48-in lance — complete cleaning kit for large vehicle and building surfaces

CA-4004-1MCH Applications and Environments

The CA-4004-1MCH’s 4.0 GPM flow makes it particularly effective for large flat surface applications: parking lot and airport apron cleaning, warehouse floor washing, and large building facade cleaning where faster area coverage per pass reduces total cleaning time. Fleet operations washing high-surface-area vehicles — buses, tankers, large flatbeds — use the 16,000 CU output to maintain throughput. Industrial facilities apply it to large equipment pads and production floor areas where 3.5 GPM units require additional passes on the same surface. Property restoration contractors use the 4000 PSI output for coating prep on wide masonry surfaces. The ETL listing makes it acceptable for facility-approval procurement processes where independently certified equipment is required.

CA-4004-1MCH GPM, PSI, and Nozzle Configuration

Rated at 4.0 GPM at 4000 PSI (16,000 cleaning units) at rated flow. Includes quick-connect nozzles in 0°, 15°, and 25° patterns; 50-ft × 3/8-in non-marking high-pressure hose; 48-in lance with insulated trigger gun. Integrated external bypass system. Cold water only. 49-state engine — not for sale in California.

Specifications

Documents

Spec Sheet
Manual

Video Overview