Mazzei Black Polypropylene Injectors

Mazzei Black Polypropylene Injectors

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Mazzei® Venturi Injectors

Mazzei pioneered this simple-to-use, easy to install, injection solution more than 30 years ago. Using high-efficiency patented and trademarked Mazzei Venturi injectors, Mazzei’s chemigation technology delivers a uniform distribution of chemicals and fertilizers within the irrigation water. Mazzei Injectors offer the advantage of an easy to maintain, non-mechanical system.

With no moving parts, and often, no supplemental pump system, Mazzei is the cost-effective choice. Because Mazzei Injectors are designed for vacuum (not pressure) transfer of irrigation chemicals, they provide safe chemigation.

The venturi style injector works off pressure differential to draw the solution into the injector system. Selecting the proper size injector unit for your application is very important. Mazzei has an "Injector Selector" on their website to help you choose which model best matches your needs. Go to .


  • Easy installation
  • Years of proven performance
  • Uniform chemical injection
  • Injection stops when water flow stops
  • Versatile and cost effective
  • High tensile strength

How a Mazzei® Venturi Injector Works
When pressurized water enters the injector inlet, it is constricted toward the injection chamber and changes into a high-velocity jet stream. This increased velocity through the injection chamber results in a lower absolute pressure. This creates a vacuum, which enables an additive material to be drawn through the suction port and incorporate into the water stream. As the jet stream is diffused toward the injector outlet, its velocity is reduced and it is reconverted into lower pressure energy.

Mazzei Quick Sizing Chart

Injector Size/Model

1/2” Model 283

1/2” Model 287

1/2” Model 384

3/4” Model 484A

3/4” Model 584

1” Model 878

1” Model 1078

Irrigation System Flow

Very Low







Minimum Flow required at 50 PSI inlet pressure

30 GPH

60 GPH

150 GPH

240 GPH

425 GPH

750 GPH

1050 GPH

Fertilizer Suction Rate at 30 PSI injector outlet pressure



10 GPH

12 GPH

21 GPH

56 GPH

86 GPH

Fertilizer Suction Rate at 10 PSI injector outlet pressure



14 GPH

17 GPH

25 GPH

75 GPH

92 GPH

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