The Comet ZWD4040G Pressure Washer Pump is built for professionals who need a reliable, high-output pump with easy installation. With 4.0 GPM flow rate and 4000 PSI maximum pressure, this direct drive pump is perfect for heavy-duty cleaning applications.
Designed with a reversible crankshaft, the ZWD4040G allows for flexible left or right-hand mounting. Its reinforced crankcase provides added load capacity, while increased oil capacity and lubrication help maintain lower operating temperatures for longer service life. Complete with a VRT3 Fast Start unloader, regulator, and thermal relief valve, this pump delivers industry-leading efficiency and durability.
- 4000 PSI & 4.0 GPM Output – Ideal for professional and industrial-grade pressure washing applications.
- Direct Drive Gas Engine Mounting Flange – Easy installation with a 1” hollow shaft for direct connection.
- Reversible Crankshaft – Allows for right or left-hand mounting for flexible installation.
- VRT3 EZ Start Unloader – Minimizes startup back pressure for smooth, no-load startup.
- Reinforced Crankcase – Enlarged design improves load capacity and oil cooling for longer pump life.
- Industrial-Grade Ceramic Plungers – Heat-resistant and abrasion-proof for extended durability.
- Thermal Relief Safety Valve – Prevents overheating by releasing hot water if the temperature inside the pump reaches a dangerous level.
- Forged Bronze Connecting Rods – For superior strength and longevity.
| Specification | Details |
| Model | Comet ZWD4040G |
| Max Pressure | 4000 PSI |
| Flow Rate | 4.0 GPM |
| Max Speed | 3400 RPM |
| Drive Type | Direct Drive |
| Shaft | 1" Hollow SAE J609B |
| Inlet Size | 1/2" FPT |
| Outlet Size | 3/8" FPT |
| Plungers | 15mm Solid Ceramic |
| Crankcase Capacity | 14 oz. |
| Pump Material | Reinforced Aluminum, Forged Bronze |
| Component | Warranty |
| Triplex Plunger Pump | 5 years (See More) |
