GP 100812 Adjustable High Draw Chemical Injector – 2.1mm

Model: 100812
Category: Pressure Washer Parts & Accessories → Chemical Injectors
Type: GP Adjustable High-Draw Downstream Chemical Injector – 2.1 mm

The GP 100812 Adjustable High-Draw Chemical Injector is a genuine General Pump (GP) OEM downstream injector designed to introduce detergents and cleaning chemicals into pressure washer systems. Installed downstream of the pump, this injector allows chemicals to be applied without exposing the pump to detergents, helping extend pump life and maintain system reliability.

Key Features

• Genuine General Pump OEM adjustable chemical injector

• High-draw downstream injection up to 20%

• 2.1 mm injector orifice designed for mid-range flow systems

• Ideal for 3–5 GPM pressure washer systems

• 3/8" male NPT inlet and outlet connections

• 1/4" hose barb chemical pickup port

• Adjustable detergent draw using built-in dial control

• Integrated check valve prevents chemical backflow

Technical Specifications

Part Number: 100812
Brand: General Pump (GP)
Injector Type: Adjustable Downstream Chemical Injector
Orifice Size: 2.1 mm
Chemical Draw Rate: Up to 20% (Hi-Draw)
Flow Range: 3 – 5 GPM
Inlet Connection: 3/8" Male NPT
Outlet Connection: 3/8" Male NPT
Chemical Port: 1/4" Hose Barb
Maximum Pressure: 4500 PSI
Maximum Temperature: 190°F
Application: Pressure washer detergent injection systems
Condition: New

How It Works

1. Water enters the injector and creates a venturi effect.

2. The pressure drop allows chemical solution to be drawn from a container.

3. Chemical mixes with the water stream and exits through the spray nozzle.

4. Chemical concentration can be adjusted using the injector dial or an inline metering valve.

Typical Applications

• Pressure washer downstream detergent injection systems

• Residential and commercial pressure washers

• Vehicle and equipment washing

• Exterior cleaning and degreasing

• Commercial pressure washing equipment requiring adjustable chemical control.