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APS PartsSKU: 100790

Downstream Fixed 20% 3 – 5 GPM Chemical Dual Draw Injector - Body

$39.95

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Overview

This is the body for a downstream dual-draw chemical injector with a fixed 20% dilution ratio, sized for pressure washers flowing 3–5 GPM at up to 4500 PSI. It installs downstream of the pump, so soap and other chemicals never pass through the pump — that protects your pump seals and lets you run a wider range of chemicals than an upstream setup allows. The dual-draw design pulls from two chemical sources, and the fixed 20% ratio means there's nothing to dial in. To draw, drop to low pressure with a black short-range soap tip or a size 40.0 blue long-range tip. Heavy-duty construction built for regular commercial use.

What's included

  • Fixed 20% dilution ratio — no adjustment needed
  • Dual chemical draw from two sources
  • Rated 4500 PSI maximum at 3–5 GPM
  • Downstream design — chemical never runs through the pump
  • Works with a wider choice of chemicals than upstream injection
  • Applies soap at low pressure with a black short-range or size 40.0 blue long-range tip
  • Heavy-duty, durable construction

Specifications

Type
Downstream chemical injector body
Draw
Dual
Dilution Ratio
Fixed 20%
Flow Range
3–5 GPM
Max Pressure
4500 PSI
Soap Tip
Black short-range or blue long-range, size 40.0

Frequently asked questions

It fits machines flowing 3–5 GPM at up to 4500 PSI. Your washer's GPM needs to fall inside that 3–5 GPM window for the injector to pull chemical reliably — an injector sized wrong for your flow won't draw.

The injector always draws chemical at a set 20% ratio and is not adjustable. If you need a different strength at the surface, mix your chemical accordingly in the supply container before drawing.

A downstream injector adds chemical after the pump, so soap and stronger chemicals never touch the pump internals. That extends pump life and allows a wider choice of chemicals than upstream (through-the-pump) injection.

Switch to low pressure using a soap nozzle — either a black short-range tip or a size 40.0 blue long-range tip. Downstream injectors only draw at low pressure; when you return to a high-pressure tip, the chemical flow stops.

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