QC ADJ CHEM INJECTOR ASSY 3-5GPM 2.1mm

SKU: 4604

QC ADJ CHEM INJECTOR ASSY 3-5GPM 2.1mm — an adjustable downstream chemical injector sized for 3-5 GPM pressure washers. The 2.1mm orifice is matched to mid-size pumps: it creates the venturi draw that pulls detergent into the water stream at low pressure, so soap-and-rinse cycles work without running chemical through the pump. This is the most common size — it fits the 3-5 GPM gas machines that make up the bulk of homeowner and prosumer washers. How to choose: match the injector orifice to your pump's flow — 1.8mm for 2-3 GPM machines (SKU 4603), 2.1mm for 3-5 GPM machines (SKU 4604), 2.3mm for 5-8 GPM machines (SKU 4605). An injector sized for a bigger machine won't draw chemical properly on a small pump, and an undersized one restricts a high-flow pump. Sold by CheapPartz as SKU 4604.