GP 100820 Fixed Chemical Injector – 1.8mm Hi-Draw | Downstream Injector

Model: 100820
Category: Pressure Washer Accessories → Chemical Injection Components
Type: Fixed Chemical Injector – 1.8mm Hi-Draw (Downstream)

The GP 100820 Fixed Chemical Injector is a genuine OEM General Pump downstream injector engineered for reliable 10% high-draw chemical induction in medium-flow pressure washer systems. Featuring a precision 1.8mm orifice, this injector is optimized for units operating between 2–3 GPM.

Performance Overview

• 10% High-Draw chemical injection rate

• Precision 1.8mm orifice

• Designed for 2–3 GPM pressure washers

• Compatible with downstream injection systems

• Suitable for hot and cold water use

Construction & Design

• Durable inline injector body

• 3/8" MPT inlet and outlet ports

• 1/4" hose barb chemical port

• Built for consistent chemical induction

Technical Specifications

Brand: General Pump (GP)
Model / SKU: 100820
Product Type: Fixed Downstream Chemical Injector
Draw Rate: 10% (Hi-Draw)
Orifice Size: 1.8mm
Flow Rate Compatibility: 2–3 GPM
Maximum Pressure: 4250 PSI
Maximum Temperature: 190°F
Inlet Connection: 3/8" MPT
Outlet Connection: 3/8" MPT
Chemical Port: 1/4" Hose Barb
Condition: New
OEM: Genuine General Pump

Ideal Applications

• Residential and light commercial pressure washers

• Downstream detergent application

• Soft washing setups

• Fleet and equipment cleaning

Usage Recommendation

Install the GP 100820 injector inline between the pump outlet and high-pressure hose. To activate chemical draw, switch to a low-pressure soap nozzle. Using the correct orifice size for your GPM range ensures proper dilution, consistent draw rate, and optimal cleaning performance.