How often must backflow prevention devices be tested according to NFPA standards?

Backflow prevention devices are critical in maintaining water quality by preventing the backflow of potentially contaminated water into the potable water supply. According to NFPA standards, these devices must be tested at least once a year to ensure they are functioning correctly. This annual testing schedule ensures that any malfunctions or weaknesses in the device can be identified and addressed promptly, thus protecting the water supply from contamination risks. Regular maintenance and testing are essential components of compliance with NFPA standards and overall public health safety.