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.
Agriculture – Clean tractors, harvesters and other farm machinery.
Commercial Property Maintenance – Clean large surfaces like parking lots, siding, patios and decks.
Surface Preparation – Strip paint, mold and other coatings in preparation for refinishing or repair work.
With 4,400 PSI it’s powerful enough for the toughest grime and 4.0 GPM for efficient rinsing and coverage on large surface areas.
Product Details
Part #: 85.140.079
Manufacturer: Comet
Model: ZWD-K4042G
Style: Triplex, direct-drive gas
Max Pressure: 4,400 PSI
Max Flow Rate: 4.0 GPM
Shaft Size: 1” horizontal shaft
RPM: 3,450
Unloader: Built-in
Soap Injector: Fixed
Manifold Material: Brass
Plunger Material: Ceramic
Inlet Connection: 3/4” GHF
Discharge Connection: Brass QC 3/8" (85.300.103)
Oil Capacity: 14 oz (30W non-detergent oil)
Thermal Relief Valve: 85.300.024
Max Inlet Temp: 60°C / 140°F
Weight: 17.5 lbs
Warranty: 5 Years
Comet Quality
Comet has been manufacturing reliable, professional grade pumps for contractors and industrial operators worldwide for years. The ZWD-K4042G Pump Assembly continues that tradition with triplex plunger design, brass manifold, ceramic plungers and built-in unloader in a pump for high demand applications.
Backed by a 5 year warranty this pump gives you peace of mind and performance.
When you need maximum pressure, high water flow and rugged durability choose the Comet ZWD-K4042G Pump Assembly – engineered for professionals, built to last.
