2" Mazzei® venturi fertilizer injector — a differential pressure injector with internal mixing vanes that uses the venturi effect to draw liquid fertilizer, acid, or other amendments into your irrigation flow. No moving parts and no electrical connections required. Flow range 32.4–159 GPM. Polypropylene body is highly resistant to most acids and alkalis.
| Connection | 2" MNPT |
|---|---|
| Flow Range | 32.4–159 GPM |
| Body Material | Polypropylene |
| Moving Parts | None |
Mazzei® venturi injectors are differential pressure injectors with internal mixing vanes. The patented design and precision construction maximizes injector efficiency, suction capacity, and mixing capabilities. With no moving parts, maintenance is simplified and operating costs are significantly lower than pump-based injection systems.
When pressurized water enters the injector inlet, it is constricted toward the injection chamber and changes into a high-velocity jet stream. The increase in velocity through the injection chamber results in a decrease in absolute pressure, creating a vacuum that draws a liquid or gas additive through the suction port and mixes it thoroughly into the water stream. As the jet stream is diffused toward the injector outlet, its velocity is reduced and resumes its flow in a thoroughly mixed state.


| Operating Pressure (PSI) | Water Suction | ||
|---|---|---|---|
| Injector INLET | Injector OUTLET | Motive Flow (GPM) | Water Suction (GPH) |
| 5 | 0 | 32.4 | 629 |
| 1 | 629 | ||
| 2 | 629 | ||
| 3 | 214 | ||
| 4 | 135 | ||
| 10 | 0 | 45.8 | 629 |
| 2 | 629 | ||
| 5 | 467 | ||
| 7 | 149 | ||
| 8 | 30.0 | ||
| 15 | 0 | 56.2 | 630 |
| 5 | 623 | ||
| 7 | 576 | ||
| 10 | 213 | ||
| 12 | 76 | ||
| 20 | 0 | 64.8 | 630 |
| 5 | 630 | ||
| 10 | 468 | ||
| 12 | 298 | ||
| 15 | 151 | ||
| 25 | 0 | 72.5 | 630 |
| 5 | 630 | ||
| 10 | 626 | ||
| 15 | 404 | ||
| 20 | 134 | ||
| 30 | 0 | 79.4 | 630 |
| 5 | 630 | ||
| 10 | 630 | ||
| 15 | 511 | ||
| 20 | 341 | ||
| 25 | 61.7 | ||
| 35 | 0 | 85.8 | 630 |
| 5 | 630 | ||
| 10 | 630 | ||
| 15 | 626 | ||
| 20 | 459 | ||
| 25 | 255 | ||
| 30 | - | ||
| 40 | 0 | 91.7 | 630 |
| 5 | 630 | ||
| 10 | 630 | ||
| 15 | 630 | ||
| 20 | 523 | ||
| 25 | 394 | ||
| 30 | 168 | ||
| 35 | - | ||
| 45 | 0 | 97.3 | 630 |
| 5 | 630 | ||
| 10 | 630 | ||
| 15 | 630 | ||
| 20 | 606 | ||
| 25 | 507 | ||
| 30 | 341 | ||
| 35 | 148 | ||
| 40 | - | ||
| 50 | 0 | 102 | 630 |
| 5 | 630 | ||
| 10 | 630 | ||
| 15 | 630 | ||
| 20 | 630 | ||
| 25 | 587 | ||
| 30 | 452 | ||
| 35 | 299 | ||
| 40 | 115 | ||
| 60 | 0 | 112 | 630 |
| 5 | 630 | ||
| 10 | 630 | ||
| 15 | 630 | ||
| 20 | 630 | ||
| 30 | 600 | ||
| 35 | 508 | ||
| 40 | 380 | ||
| 45 | 216 | ||
| 70 | 0 | 121 | 630 |
| 5 | 630 | ||
| 10 | 630 | ||
| 15 | 630 | ||
| 20 | 630 | ||
| 30 | 630 | ||
| 40 | 528 | ||
| 45 | 440 | ||
| 50 | 326 | ||
| 55 | 142 | ||
| 80 | 0 | 130 | 630 |
| 5 | 630 | ||
| 10 | 630 | ||
| 15 | 630 | ||
| 20 | 630 | ||
| 30 | 630 | ||
| 40 | 604 | ||
| 50 | 505 | ||
| 60 | 269 | ||
| 65 | 60.7 | ||
| 90 | 0 | 138 | 630 |
| 5 | 630 | ||
| 10 | 630 | ||
| 20 | 630 | ||
| 30 | 630 | ||
| 40 | 630 | ||
| 50 | 601 | ||
| 60 | 458 | ||
| 70 | 179 | ||
| 75 | - | ||
| 100 | 0 | 145 | 630 |
| 5 | 630 | ||
| 10 | 630 | ||
| 20 | 630 | ||
| 30 | 630 | ||
| 40 | 630 | ||
| 50 | 621 | ||
| 60 | 593 | ||
| 70 | 412 | ||
| 80 | 120 | ||
| 120 | 0 | 159 | 630 |
| 5 | 630 | ||
| 10 | 630 | ||
| 20 | 630 | ||
| 30 | 630 | ||
| 40 | 630 | ||
| 50 | 630 | ||
| 60 | 612 | ||
| 70 | 595 | ||
| 80 | 523 | ||
| 90 | 309 | ||
| 100 | - | ||