General Pump Hi-Draw Adjustable Acid Injector 2.1mm 3–5 GPM – OEM Replacement Part

Part Number: 5668
Category: Pressure Washer Components → Chemical Injectors → Adjustable Chemical Injectors
Type: Hi-Draw Adjustable Downstream Acid Injector

The General Pump Hi-Draw Adjustable Acid Injector 2.1mm 3–5 GPM (Part #5668) is a premium OEM replacement downstream chemical injector designed for high-performance detergent, soap, and acid application in pressure washer and soft wash systems. Manufactured by General Pump, this injector features an adjustable chemical draw design that allows operators to fine-tune chemical flow rates for optimal cleaning performance.

Key Features & Benefits

• Genuine General Pump OEM replacement part
• Adjustable downstream chemical injector
• Hi-Draw design for increased chemical pickup
• 2.1mm injector orifice
• Optimized for 3.0–5.0 GPM systems
• 3/8" MPT inlet and outlet connections
• 1/4" hose barb chemical pickup port
• Suitable for detergent, soap, and acid application
• Helps improve cleaning efficiency
• Ideal for commercial and industrial pressure washing

Technical Specifications

Part Number: 5668

Manufacturer: General Pump

Product Type: Adjustable Chemical Injector

Injector Size: 2.1mm

Flow Range: 3.0 – 5.0 GPM

Inlet Connection: 3/8" MPT

Outlet Connection: 3/8" MPT

Chemical Pickup Port: 1/4" Hose Barb

Adjustable: Yes

Maximum Pressure: 4500 PSI

Maximum Temperature: 190°F

Chemical Injection Style: Downstream

Application: Detergent, Soap & Acid Injection

OEM Replacement: Yes

Typical Applications

• Commercial pressure washing
• Industrial cleaning systems
• Acid application systems
• Equipment restoration projects
• Fleet washing operations
• Concrete cleaning
• Building exterior cleaning
• Degreasing applications
• Soft wash support systems
• Downstream chemical injection setups

Performance Advantages

• Adjustable design allows precise chemical draw control
• Hi-Draw performance increases chemical pickup efficiency
• Optimized for medium-flow pressure washer systems
• Helps improve cleaning speed and effectiveness
• Keeps chemicals downstream of the pump to reduce pump wear
• Suitable for acids, detergents, and specialty cleaning solutions
• Supports consistent chemical application performance
• Heavy-duty construction for demanding environments
• General Pump quality ensures dependable long-term operation

Maintenance Recommendations

• Flush the injector thoroughly with clean water after chemical use.
• Inspect the chemical pickup tube regularly for wear or blockages.
• Check the injector orifice periodically for buildup or debris.
• Inspect adjustment components to ensure smooth operation.
• Replace worn O-rings, springs, or internal components as necessary.
• Use only compatible pressure washer chemicals and acids according to equipment recommendations.