Comet ZWD-K4042G Pump – 4.0 GPM, 4,400 PSI, 1" Shaft

Heavy Duty Triplex Pump for Extreme Cleaning The Comet ZWD-K4042G Pump Assembly (Bare Pump Part #85.140.079) is a professional grade triplex direct-drive gas pump for contractors, industrial users and property maintenance professionals who need maximum cleaning power. With up to 4,400 PSI at 4.0 GPM this pump gives you the perfect balance of high pressure and water flow for the toughest cleaning jobs. Built by Comet, a global leader in pressure washer pump technology, the ZWD-K4042G has a brass manifold, ceramic plungers and built-in unloader in a rugged design for long life. Backed by a 5 year warranty it’s a great choice for those who need a reliable long lasting pump for heavy duty use. Features Bare Pump Part #: 85.140.079 Pump Manufacturer: Comet Pump Model: ZWD-K4042G Pump Style: Triplex, direct-drive gas Max PSI: 4,400 Max GPM: 4.0 Shaft Size: 1" horizontal shaft Unloader Type: Built-in Plunger (Piston): Ceramic for long life Inlet Size: 3/4" GHF (garden hose fitting) Discharge Size: 3/8" Brass QC (85.300.103) Soap Injector: Fixed Manifold Type: Brass for heat dissipation and corrosion resistance RPM: 3,450 Max Inlet Temp: 60°C / 140°F Thermal Relief Valve: 85.300.024 included Oil Capacity: 14 oz Oil Type: 30W non-detergent oil Weight: 17.5 lbs Warranty: 5 Years Power and Efficiency in One PumpThe ZWD-K4042G has a triplex plunger design, the industry standard for professional pumps. With three precision engineered plungers the pump runs smoother, reduces vibration and is more efficient than axial pumps. Delivers 4,400 PSI of maximum pressure to cut through the toughest grime, grease and stains and the 4.0 GPM flow rate for fast coverage on larger cleaning jobs. This balance of pressure and volume is perfect for applications where both cutting power and rinsing are required. Built for Durability Durability is at the heart of the ZWD-K4042G design: Ceramic plungers resist heat and wear for long life under heavy workload. Brass manifold increases corrosion resistance, strength and heat dissipation for reliable long life. 1” shaft size for compatibility with commercial grade gas engines. Weighs 17.5 lbs for solid build quality of a professional grade component but still manageable for installation and maintenance. Integrated Features for Operator Convenience The Comet ZWD-K4042G comes with several features to make it more reliable and easier to use: Built-in unloader automatically regulates system pressure to protect the pump and components from overpressure damage. Fixed soap injector for easy detergent application by simply switching to a low pressure nozzle. Brass quick-connect discharge (3/8”) for leak free, secure hose connection that saves time during setup. Thermal relief valve (85.300.024) to protect the pump by releasing overheated water during extended bypass operation. Maintenance The ZWD-K4042G requires 14 oz of 30W non-detergent oil to lubricate the internal components. Routine oil checks and scheduled changes are quick and inexpensive maintenance that extends pump life. Designed to handle inlet water temperatures up to 140°F (60°C) for more flexibility especially for commercial and industrial cleaning applications. Applications The Comet ZWD-K4042G Pump Assembly is perfect for heavy duty cleaning jobs that require both power and efficiency. Common applications:* Construction and Industrial Cleaning – Remove concrete residue, heavy mud and grease from machinery and job sites. Fleet and Vehicle Washing – Keep buses, trucks and trailers spotless with high pressure and volume. Agricul