Partial List of Backflow Prevention Devices
- Air gap
- Atmospheric vacuum breaker (AVB)
- Check valve (usually not a legally approved method of backflow prevention)
- Chemigation valve (primarily used in agriculture)
- Double check valve, or double check valve assembly (DCVA)
- Pressure vacuum breaker assembly (PVB)
- Reduced Pressure Principle Valve (RPPV or RP Device)
- Reduced pressure zone device (RPZ)
- Spill Resistant Pressure vacuum breaker assembly (SPVB)
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