GP 100821 Fixed Chemical Injector – 2.1mm Hi-Draw | Downstream Injector

Model: 100821
Category: Pressure Washer Accessories → Chemical Injection Components
Type: Fixed Chemical Injector – 2.1mm Hi-Draw (Downstream)

The GP 100821 Fixed Chemical Injector is a genuine OEM General Pump downstream injector designed to deliver a consistent 10% high-draw chemical ratio for mid-range flow pressure washer systems. Featuring a precision 2.1mm orifice, this injector is optimized for units operating between 3–5 GPM.

Performance Overview

• 10% High-Draw chemical injection rate

• Precision 2.1mm orifice

• Designed for 3–5 GPM pressure washer systems

• Compatible with downstream detergent setups

• Suitable for hot and cold water applications

Construction & Design

• Durable inline injector body

• 3/8" MPT inlet and outlet ports

• 1/4" hose barb chemical suction port

• Engineered for reliable and consistent chemical draw

Technical Specifications

Brand: General Pump (GP)
Model / SKU: 100821
Product Type: Fixed Downstream Chemical Injector
Draw Rate: 10% (Hi-Draw)
Orifice Size: 2.1mm
Flow Rate Compatibility: 3–5 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

• Commercial pressure washing systems

• Fleet washing and equipment cleaning

• Residential and industrial detergent application

• Downstream soft wash setups

Usage Recommendation

Install the GP 100821 injector inline between the pump discharge and high-pressure hose. To activate chemical draw, switch to a low-pressure soap nozzle. Selecting the correct injector for your GPM range ensures proper dilution, stable chemical induction, and optimal cleaning efficiency.