Description
Overview
The Honda WT40 is the ultimate heavy-duty solution for professional dewatering, standing as the highest-capacity pump in the Honda lineup. Engineered for massive scale operations, this 4-inch centrifugal trash pump moves a staggering 423 gallons per minute. Driven by the commercial-grade Honda GX390 engine, it is built to tackle the most punishing job sites, from municipal flood control to large-scale construction excavations where time and volume are critical.
This pump is designed to handle "trash" water containing solids up to 1-1/16" without clogging, thanks to its uniquely shaped conical impeller. To ensure long-term reliability in abrasive environments, the WT40 features a replaceable stainless steel wear plate and high-durability silicon carbide seals. When maintenance is required, the quick clean-out port provides easy access to the pump's interior, allowing you to clear debris and get back to work in minutes.
Top Performance Features
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Highest Capacity in the Lineup: Delivers an incredible 423 GPM, making it the premier choice for clearing vast amounts of water quickly.
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1-1/16" Solids Handling: Specifically engineered to pass gravel, stones, and debris-heavy slurry that would disable standard pumps.
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Honda GX390 Commercial Engine: A 389cc powerhouse that offers legendary easy-start reliability and the high-torque performance needed for maximum discharge.
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Tool-Free Quick Clean-Out: The service port is designed for rapid entry into the pump case, ensuring fast debris removal and minimal downtime.
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Conical Cast Iron Impeller: A proprietary wide-vane design that maximizes water flow while resisting the wear caused by sandy or silty water.
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Replaceable Stainless Steel Wear Plate: Protects the rigid cast iron volute from internal erosion, allowing for easy and cost-effective maintenance.
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Silicon Carbide Mechanical Seals: Features ultra-hard, abrasion-resistant seals designed specifically for the extended wear associated with trash-pumping.
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Isolation-Mounted Full Frame: A heavy-duty steel cage protects the unit, while vibration-reducing mounts keep the 172-lb pump stable on both hard and soft surfaces.
Core Specifications
| Feature | Details |
| Engine | Honda GX390 (389cc) OHV Commercial |
| Pump Type | Trash Centrifugal, Self-Priming |
| Discharge Capacity | 423 Gallons Per Minute |
| Port Diameter | 4.0" NPT (Suction & Discharge) |
| Solids Handling | 1.06" (1-1/16") |
| Total Head Lift | 82 Feet |
| Dry Weight | 172 lbs. |
| Run Time @ Max Discharge | ~1.5 Hours |
| Warranty | 24-Month Residential / 12-Month Commercial |
The Industry's Leading Large-Volume Pump
The WT40 is the definitive tool for contractors and municipal crews who cannot afford equipment failure. Its combination of 4-inch port diameters and the GX390 engine provides the muscle required for the largest dewatering projects. From its steel strainer to its convenient multi-tool for on-site servicing, every aspect of the WT40 is built for industrial-scale reliability.
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