Comet ZWD4040G Gas Flange Pump – 4.0 GPM @ 4000 PSI – 1" Hollow Shaft
Part Number: ZWD4040G
Category: Pressure Washer Pumps → Triplex Pumps → Gas Engine Direct Drive Pumps
Type: Comet ZWD4040G Gas Flange Pump
The Comet ZWD4040G Gas Flange Pump is a professional-grade direct-drive triplex pressure washer pump engineered for demanding commercial, industrial, agricultural, and contractor cleaning applications. Designed for gasoline-powered pressure washer systems utilizing a 1-inch horizontal hollow shaft, the ZWD4040G delivers exceptional cleaning power, durability, and long-term reliability in high-pressure operating environments.
Image shown for illustrative purposes only
Key Features & Benefits
- Genuine Comet ZWD4040G Triplex Pressure Washer Pump
- Produces up to 4.2 GPM
- Rated for 4400 PSI
- Direct-drive gas flange design
- Compatible with 1" horizontal hollow shaft engines
- Durable ceramic plungers for extended service life
- Heavy-duty brass manifold construction
- External pressure unloader system
- Adjustable chemical injector included
- Thermal relief valve included
- Designed for demanding commercial and industrial applications
- Compact direct-drive configuration
- Built for long-term durability and reliable performance
Technical Specifications
Manufacturer: Comet
Model: ZWD4040G
Pump Type: Triplex Plunger Pump
Pump Style: Direct-Drive Gas Flange
Maximum Pressure: 4400 PSI
Maximum Flow Rate: 4.2 GPM
Operating Speed: 3450 RPM
Shaft Size: 1" Horizontal Hollow Shaft
Plunger Material: Ceramic
Manifold Material: Brass
Inlet Connection: 3/4" GHF (Garden Hose Fitting)
Discharge Connection: 3/8" Brass Quick Connect
Unloader Type: External
Unloader Part Number: 85.300.037
Soap Injector: Adjustable
Injector Part Number: 85.400.000
Thermal Relief Valve: Included
Thermal Relief Valve Part Number: 85.300.023
Maximum Inlet Water Temperature: 140°F (60°C)
Oil Capacity: 14 oz
Recommended Oil: 30W Non-Detergent Oil
Weight: 25 lbs
Typical Applications
- Commercial pressure washer systems
- Industrial cleaning equipment
- Fleet washing operations
- Heavy equipment cleaning
- Agricultural cleaning systems
- Construction site cleanup
- Property maintenance services
- Mobile pressure washing rigs
- Equipment manufacturing and OEM applications
- Municipal and facility maintenance
Performance Advantages
- Delivers 4.2 GPM at 4400 PSI for powerful professional-grade cleaning
- Triplex plunger design provides smooth operation and long service life
- Ceramic plungers offer superior wear resistance and seal longevity
- Brass manifold improves durability, corrosion resistance, and heat dissipation
- Direct-drive gas flange configuration simplifies installation
- Compatible with common 1-inch hollow shaft gasoline engines
- Adjustable chemical injector improves detergent application capabilities
- Thermal relief valve helps protect the pump during bypass operation
- Suitable for demanding commercial and industrial cleaning environments
- Built with Comet's professional-grade engineering for maximum reliability and performance
