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

Original price $27.50 - Original price $27.50
Original price
$27.50
$27.50 - $27.50
Current price $27.50

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.

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