The Mazzei 2" Check Valve (Part No. C75-CVA) is a high-quality, PVC in-line check valve designed specifically for use with the Mazzei 2" Venturi Injector. It must be connected to the suction port of the injector to prevent backflow of liquid fertilizer or chemicals back through the injector. Backflow can occur when there is insufficient differential pressure between the injector's inlet and outlet, or during a no-flow condition in a pressurized line — both of which can contaminate your water supply or damage your system.
Constructed from durable PVC with low cracking pressure, this check valve is suitable for both liquid and gas suction applications. It features 1.25" Female NPT inlet and 1.0" barbed outlet connections, and weighs just 0.39 lbs. For a complete fertigation setup, pair with the full Mazzei injector system and a backflow prevention device upstream of your injector assembly.
| Specification | Details |
|---|---|
| Part Number | C75-CVA |
| Compatible Injector | Mazzei 2.0" Venturi Injectors |
| Inlet Connection | 1.25" Female NPT (FPT) |
| Outlet Connection | 1.0" Barbed |
| Body Material | PVC |
| Valve Type | In-Line Check Valve (Low Cracking Pressure) |
| Applications | Liquid & Gas Suction Lines |
| Weight | 0.39 lbs (0.18 kg) |
| Brand | Mazzei Injector Company |
Why does my Mazzei 2" injector need a check valve?
Without a check valve on the suction port, liquid fertilizer or chemicals can backflow through the injector and into your water supply when there is insufficient differential pressure or when motive flow stops.
This is a critical safety and system-protection component for any fertigation or chemigation application using a Mazzei 2" injector.
Where exactly does this check valve connect on the injector?
This check valve connects directly to the suction port of the Mazzei 2" injector. The 1.25" FPT inlet threads onto the injector's suction port, and the 1.0" barbed outlet connects to your suction tubing leading to your fertilizer or chemical solution tank.
Is this check valve compatible with other Mazzei injector sizes?
No. The C75-CVA is specifically designed for Mazzei 2.0" injectors. Other Mazzei injector sizes require their own corresponding check valve models.
Consult the full Mazzei product line to find accessories matched to your specific injector size.
Do I also need a separate backflow preventer on my main water line?
Yes. This suction-port check valve protects the injector itself, but a separate backflow prevention device should always be installed upstream on your main water supply line whenever fertilizers or chemicals are injected into an irrigation system.
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