4200PSI 4.2GPM Truck Mount Cold Water Pressure Washer - WJ4213HTBGS

The WetJet WJ4213HTBGS 4200 PSI / 4.2 GPM Truck-Mount Pressure Washer is engineered for contractors and professionals who need maximum cleaning force directly from their work vehicle. Designed to bolt securely to a truck or trailer, this heavy-duty system features integrated anti-vibration pads that reduce movement, noise, and wear—ensuring stable, reliable performance wherever the job takes you.

With a powerful Honda GX390 commercial engine, this unit delivers a true 4200 PSI of cleaning pressure, giving you the muscle needed to remove heavy dirt, oil, mildew, and buildup across a wide range of demanding applications.

Known for legendary reliability and smooth operation, the Honda GX390 provides consistent high-output performance for long cleaning sessions and daily jobsite use. Its automatic low-oil shutdown offers an added layer of protection by shutting the engine off when oil levels drop, helping safeguard the engine from accidental damage. Combined with a large-capacity fuel tank for extended runtime, this engine is built for productivity, efficiency, and long service life.

This truck-mount system is equipped with a commercial-grade General triplex pump, engineered for long-term durability and high-pressure stability. Featuring precision-machined components, a thermal relief system, and advanced sealing technology, the triplex pump provides smooth water flow and exceptional longevity under continuous use.

Built for professionals, it delivers reliable output for fleet washing, construction cleanup, agriculture, and mobile pressure washing businesses.

The WJ4213HTBGS is securely mounted on a powder-coated steel base plate, designed to bolt directly through your truck or trailer deck for maximum stability. Heavy-duty anti-vibration pads reduce shock and equipment strain, while the rugged mounting plate protects the pump and engine from impact, vibration, and worksite conditions. This truck-mount design ensures your pressure washer stays secure, organized, and ready for immediate use.

Reaching difficult areas is effortless with the included 50 ft. steel-braided high-pressure hose, designed for high strength, flexibility, and resistance to abrasion. A 36-inch insulated spray gun wand assembly provides added control and protection when working with high-pressure water streams.

The unit includes four quick-connect nozzles (15°, 25°, 40°, and Soap), allowing you to quickly switch between spray patterns for everything from deep cleaning to wide-area rinsing.

Engineered with essential safety features, this pressure washer includes thermal relief valves, safety-lock gun technology, and durable components designed to withstand daily wear.

While the Honda GX engine carries its own manufacturer warranty, the pump, frame, and system components are backed separately by the company—ensuring you receive reliable support across the entire unit. This truck-mount washer is built to handle heavy grime, mildew, grease, and industrial buildup across a wide range of surfaces.

Every unit is fully function-tested at the factory to ensure proper operation, and may include minimal residual oil or a slight fuel odor as a result of this process. Always confirm the engine oil reservoir is filled before starting the machine for the first time.