How frequently should backflow prevention devices be tested under the UPC?

Backflow prevention devices are critical for safeguarding potable water supplies by preventing contaminants from entering the drinking water system. Under the Uniform Plumbing Code (UPC), these devices must be tested at least once a year to ensure they are functioning properly. This annual testing is essential as it helps detect any functional failures or deterioration that could compromise safe drinking water. Regular yearly tests ensure compliance with health and safety regulations and maintain the integrity of the water supply.

While some options suggest more frequent testing, such as every month or every six months, these intervals are generally not required under the UPC unless specific local regulations dictate otherwise or if the device is in a high-risk application. Other choices like every two years are insufficient, as annual testing is crucial for ensuring that backflow prevention devices remain operational and effective in protecting the water supply.