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GP 1.8mm 2-3 GPM High Draw Fixed Injector 4500 PSI
$17.82
GP 1.8mm 2-3 GPM High Draw Fixed Injector 4500 PSI. A downstream chemical injector with a 1.8mm orifice, sized for 2-3 GPM machines.
A downstream injector draws cleaning chemical into the water stream after the pump, which is what lets you apply soap through a pressure washer without running chemical through the pump itself. Chemical is drawn by the pressure drop created as water passes through the injector's orifice — which is why downstream injection only works at low pressure, with a soap nozzle installed.
A fixed injector delivers a consistent draw ratio with nothing to adjust or accidentally bump out of position — one less variable to manage on site.
Orifice size must match your machine's flow. An injector sized wrong for your GPM either won't draw at all or will draw inconsistently. If your injector has stopped drawing, check the check valve before replacing the injector — a failed check valve is the more common culprit and far cheaper to fix.
Frequently Asked Questions
What flow rate is this injector for? 2-3 GPM
Why won't my injector draw chemical? Most often a failed check valve, a clogged filter on the chemical pickup, or using a high-pressure nozzle instead of a soap nozzle. Downstream injection requires low pressure to draw.
Fixed or adjustable? Fixed — consistent draw with no adjustment required.
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