General Pump 100776 Hi-Draw Injector 3/8" MPT 2.3mm - 6741
Up to 20% draw
Couldn't load pickup availability
The General Pump 100776 is a fixed hi-draw downstream chemical injector with a 2.3 mm orifice, built for pressure washers running 5 to 8 GPM. It introduces chemicals after the pump, so your pump internals never contact corrosive solutions like sodium hypochlorite. Pressure washing contractors, fleet washers, and house washing professionals use it to deliver consistent chemical concentration at the gun without manual mixing at the surface.
Why You'll Love the General Pump 100776 Injector
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Up to 20% chemical draw without adjustments – The 2.3 mm orifice pulls chemical at rates that standard-draw injectors (typically around 10%) cannot match. That means stronger cleaning solution reaching the surface on each pass, cutting dwell time on house siding, stucco, and concrete.
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Matched to 5–8 GPM commercial machines – The orifice diameter is sized so that the venturi effect works reliably across the 5 to 8 GPM flow rate range. There is no need to swap injectors when switching between jobs or adjusting pressure within that window.
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Pump protection through downstream injection – The injector allows for downstream chemical application to protect interior pump components. Bleach, surfactants, and degreasers enter the water stream after the unloader, so your pump seals, valves, and plungers see only clean water.
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Field-ready in minutes – Two 3/8" NPT-M ports and a 1/4" hose barb are all the connections you need. Teflon tape, a wrench, and a chemical supply hose get you running. The body weighs 0.3 lbs, so it fits in tight trailer layouts without adding bulk.
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Handles bleach when maintained – Common uses include commercial pressure washing and soft washing with sodium hypochlorite mixes. Flush the injector with clean water after every job and the brass body and Viton seals hold up for weeks to months of daily use.
What Makes the 100776 Injector Different
Generic downstream injectors often use undersized orifices or weak check valves that choke chemical draw on 5–8 GPM machines. The 100776 addresses that with a 2.3 mm orifice calibrated to maintain suction at higher flow rates, where smaller injectors lose vacuum.
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Fixed ratio removes operator error – Adjustable injectors let you dial draw rate up or down, but they also let someone accidentally turn the knob to near-zero mid-job. The 100776 delivers the same draw every trigger pull. To change the strength reaching the surface, you adjust the mix in your tank or swap nozzle sizes.
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Standard thread compatibility – The 3/8" NPT-M connections fit directly into most commercial pressure washing setups. Ball valves, bypass kits, and hose reels with 3/8" fittings connect without adapters.
Product Details:
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Orifice size: 2.3 mm (0.090")
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Flow range: 5.0 to 8.0 GPM
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Maximum pressure rating: 4,500 PSI
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Maximum fluid temperature: 190°F
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Connections: 3/8" NPT-M inlet, 3/8" NPT-M outlet, 1/4" hose barb for chemical supply
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Body material: Brass with stainless steel internal nozzle surfaces and Viton o-ring seals
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Weight: 0.3 lbs
Frequently Asked Questions
Does hose length affect draw rate? Yes. Longer hose runs reduce the pressure drop at the injector, which weakens the venturi vacuum. If you are running 250+ feet of hose, consider a larger soap nozzle or a shorter hose to restore draw.
Can I adjust the dilution ratio? The 100776 is a fixed hi-draw injector with no metering knob. To change chemical strength at the surface, adjust the concentration in your mix tank or change your nozzle size. This is a deliberate design choice: fixed draw removes the risk of accidental adjustment during a job.
Ready to Add the 100776 to Your Setup?
The General Pump 100776 delivers stronger chemical draw, protects your pump from corrosive solutions. For any business running a 5–8 GPM pressure washer with sodium hypochlorite or detergent downstream, it is one of the highest-return products you can add to your trailer.