Backflow Prevention 

Importance of Backflow Prevention

Backflow prevention is essential to ensure the safety of potable water supplies. Backflow refers to the undesirable reversal of flow in a water system, which can lead to contamination from various sources. Having certified technicians to inspect, test, maintain, and service backflow preventers is crucial for:

  • Protecting Public Health: Prevents contamination that can arise from soil, chemicals, or waste entering the drinking water supply.

  • Ensuring Compliance: Many municipalities require regular testing and certification of backflow prevention devices to comply with health regulations.

How Backflow Occurs

Backflow can happen due to several reasons, including:

  • Water Main Breaks: A sudden burst in the water main can reduce pressure, allowing contaminants to enter the system.

  • Frozen Pipes: If pipes freeze, pressure can drop, causing backflow.

  • High Demand: Sudden demand on the water system (for instance, when multiple fire hydrants are used simultaneously) can create negative pressures.

Common Types of Backflow Prevention Devices

  1. Air Gap (AG): The most effective form of backflow prevention, relies on gravity to prevent backflow.

  2. Atmospheric Vacuum Breaker (AVB): Prevents backflow by breaking the vacuum in the water supply.

  3. Detector Check: Monitors water flow in irrigation systems.

  4. Check Valve: Commonly used but not legally approved for backflow prevention.

  5. Chemigation Valve: Primarily used in agricultural applications to prevent contamination.

  6. Double Check Valve Assembly (DCVA): A reliable choice for preventing backflow.

  7. Dual Check Valve: Commonly used in residential areas, not testable.

  8. Pressure Vacuum Breaker Assembly (PVB): Effective for preventing backflow in non-health hazard applications.

  9. Reducing Pressure Zone Device (RPZ): Offers the highest protection level and is suitable for high-risk installations.

  10. Spill Resistant Pressure Vacuum Breaker Assembly (SPVB): Designed to mitigate spills effectively.

  11. Vacuum Breaker: Prevents siphoning which can lead to backflow.

Conclusion

Regular inspection and maintenance of backflow prevention devices are crucial for safeguarding water quality. Sauer Fire Protection Services is committed to ensuring that your water supply remains safe and uncontaminated. For more information or to schedule a service, feel free to reach out!

Certification # BF-2023-454