4000PSI 4.0GPM Gas Pressure Washer with Triplex Pump - WJ4013HA
Professional Power and Durability for Demanding Jobs
The WJ4013HA Pressure Washer is engineered for professionals who demand consistent power, durability, and efficiency on every job. Powered by a commercial-grade Honda engine with an exceptional weight-to-power ratio, this unit is built for continuous use in demanding environments. Its direct drive system ensures efficient power transfer, while the AR triplex pump—featuring a die-cast body, forged brass manifold, ceramic-coated plungers, soap injector, and thermal release valve—delivers dependable performance and long service life.
Designed with a built-in unloader to regulate water flow, the WJ4013HA combines reliability and ease of use in a rugged, portable package. The powder-coated steel frame includes built-in accessory storage, and 10″ flat-free tires provide effortless mobility over rough terrain. Complete with a 50′ high-pressure hose, professional spray gun and wand assembly, and four quick-connect nozzles, this unit is ready for heavy-duty cleaning right out of the box.
WJ4013HA - 4.000PSI Gas Pressure Washer
Specifications
The WetJet WJ4013HA is powered by a commercial-grade Honda engine paired with an AR triplex pump for professional performance and durability. Its direct-drive system ensures efficient power transfer, while the built-in unloader delivers smooth and consistent water flow. Equipped with a 50′ high-pressure hose, spray gun, and four nozzles, the powder-coated steel frame and 10″ flat-free tires make it easy to maneuver across any terrain for all-day reliability.
Powder Coated Steel
Honda GX390
389
4,000
4.0
Triplex
Built-In
30W Non-Detergent
3 Years
Fixed Injector
142lbs
Built for Extreme Cleaning Power
The WJ4013HA Gas Pressure Washer is engineered for professionals who need uncompromising power, high output, and dependable performance in demanding environments. Driven by the commercial-grade Honda GX390 engine, this unit offers one of the best weight-to-power ratios in the industry. Built for long operating hours and rugged jobsite conditions, the GX390 delivers smooth, consistent power—making it the ideal choice for contractors, industrial facilities, fleet maintenance, and agricultural operations that require serious cleaning force day after day.
Efficient and Reliable Direct-Drive System
Designed for maximum efficiency, the direct drive system connects the engine directly to the pump, minimizing vibration and energy loss. This streamlined design eliminates belts and pulleys, reducing maintenance needs and ensuring a compact, durable power transfer system. The result is a machine that starts easily, runs smoothly, and delivers consistent high-pressure output through heavy daily use.
Commercial-Grade AR Triplex Pump
At the center of the WJ4013HA is a commercial-grade AR triplex pump, built to withstand continuous professional operation. The pump features a die-cast body, forged brass manifold, and ceramic-coated plungers for superior durability and resistance to heat and wear.
A built-in soap injector allows for easy detergent application, while the thermal release valve protects the pump from overheating during extended cleaning sessions. Delivering 4.0 GPM at a powerful 4000 PSI, this premium triplex pump ensures smooth flow, long service life, and unmatched reliability.
Built-In Unloader for Precision Pressure Control
The integrated unloader valve automatically regulates pressure to protect both the pump and user, ensuring steady performance under varying conditions. This compact, efficient system prevents pressure spikes, reduces internal stress, and delivers smooth flow control—perfect for demanding commercial workflows that require dependable output hour after hour.
Ready to Use Right Out of the Box
To get you working immediately, this pressure washer comes equipped with a 50-foot high-pressure hose, a professional spray gun and wand assembly, and a set of four quick-connect spray nozzles. Effortlessly switch between spray patterns for anything from deep surface penetration to wide-area rinsing.
With professional accessories included, the WJ4013HA delivers full cleaning capability from the moment you unbox it.
Rugged Frame and All-Terrain Mobility
Built on a powder-coated steel frame, this model is designed to withstand harsh environments while keeping accessories organized and easily accessible. Integrated storage points ensure hoses, nozzles, and the spray gun remain secure during transport.
Large 10-inch flat-free tires make navigating rough terrain effortless, providing stability and durability whether you’re working on uneven ground, jobsite debris, or outdoor environments.
Engineered for Heavy Professional Use
Every component of the WJ4013HA is crafted for durability, power, and long-lasting performance. From the proven Honda GX390 engine to the commercial AR triplex pump and rugged frame design, this unit is built to handle intensive daily workloads in the toughest settings.
With high pressure, high flow, and heavy-duty construction, it stands as a top-tier solution for professionals who demand reliability and strength from their cleaning equipment.