What is the required distance for a pressure vacuum breaker to be installed above any connected fixtures?

The correct distance for a pressure vacuum breaker to be installed above any connected fixtures is 6 inches. This requirement is in place to ensure proper protection against backflow and to maintain a safe air gap. By installing the pressure vacuum breaker at this height, it allows for the prevention of any contamination that could occur if there were a reversal of flow due to a drop in pressure.

This distance is significant because it creates a reliable barrier, ensuring that any potential backflow remains at a distance sufficient to mitigate contamination risks. Adhering to this standard helps to protect the drinking water supply from possible pollution or hazardous substances that could enter the plumbing system. Thus, understanding and implementing this guideline is crucial for ensuring compliant installations and safeguarding public health.