What is the recommended installation point for a pressure vacuum breaker?

The recommended installation point for a pressure vacuum breaker is near high-hazard devices. This is crucial because the primary function of a pressure vacuum breaker is to prevent backflow, particularly in situations where there is a risk of contamination from high-hazard sources like chemical injectors, irrigation systems, or fire protection lines. Placing the pressure vacuum breaker close to these high-hazard devices ensures that any potential backflow is effectively contained before it can mix with the potable water supply, hence protecting the public health and drinking water quality.

The effectiveness of the pressure vacuum breaker diminishes with distance from the source of the potential backflow. Therefore, installing it near high-hazard devices maximizes its protective capabilities. It also aligns with plumbing codes that aim to mitigate risks associated with water contamination. Understanding this principle is essential for any plumbing professional to maintain compliance and ensure safety in their installations.