Comet ZWD5030G Gas Flange Pump – 5.0 GPM @ 4000 PSI – 1" Hollow Shaft

Part Number: ZWD5030G
Category: Pressure Washer Pumps → Triplex Pumps → Gas Engine Direct Drive Pumps
Type: Comet ZWD5030G Gas Flange Pump

The Comet ZWD5030G Gas Flange Pump is a professional-grade direct-drive triplex pressure washer pump engineered for commercial pressure washing, industrial cleaning, agricultural applications, and contractor-grade equipment. Designed for use with gasoline engines utilizing a 1-inch horizontal hollow shaft, this pump delivers dependable performance, smooth operation, and long service life in demanding cleaning environments.

Key Features & Benefits

• Genuine Comet ZWD5030G Triplex Pressure Washer Pump
• Direct-drive gas engine flange design
• Produces up to 5.1 GPM
• Rated for 3000 PSI
• Compatible with 1" horizontal hollow shaft engines
• Durable ceramic plungers for extended service life
• Heavy-duty brass manifold construction
• External unloader system for easy adjustment
• Adjustable chemical injector included
• Thermal relief valve included
• Designed for professional and commercial pressure washing systems
• Compact direct-drive configuration
• Built for long-term reliability and performance

Technical Specifications

Manufacturer: Comet
Model: ZWD5030G
Pump Type: Triplex Plunger Pump
Pump Style: Direct-Drive Gas Flange Pump

Maximum Pressure: 3000 PSI
Maximum Flow Rate: 5.1 GPM

Operating Speed: 3450 RPM

Shaft Configuration: 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

Chemical Injector: Adjustable
Injector Part Number: 85.400.000

Thermal Relief Valve: Included
Thermal Relief Valve Part Number: 85.300.024

Maximum Inlet Water Temperature: 140°F (60°C)

Oil Capacity: 14 oz

Recommended Oil: 30W Non-Detergent Oil

Typical Applications

• Commercial pressure washers
• Contractor pressure washing systems
• Fleet washing equipment
• Agricultural cleaning systems
• Construction equipment cleaning
• Property maintenance operations
• Industrial cleaning applications
• Pressure washer pump replacements
• Equipment manufacturing and assembly
• Mobile pressure washing rigs

Performance Advantages

• Produces 5.1 GPM at 3000 PSI for powerful cleaning performance
• Triplex pump design provides smoother operation and longer service life
• Ceramic plungers improve wear resistance and seal longevity
• Brass manifold resists corrosion and harsh operating environments
• Direct-drive configuration offers compact installation and efficient power transfer
• Adjustable chemical injector enhances detergent application capabilities
• Thermal relief valve helps protect the pump during bypass operation
• Compatible with common gasoline engine pressure washer systems
• Designed for demanding commercial and industrial cleaning applications
• Comet engineering delivers professional-grade reliability and durability