What is the primary concern with backflow prevention devices?

The primary concern with backflow prevention devices is that they may fail and allow contamination. Backflow prevention devices are critical for protecting the potable water supply from contamination due to reverse flow of water, which can happen during pressure changes or system failures. If a backflow device fails, it can result in non-potable water, chemicals, or other contaminants entering the clean water supply. This can pose serious health risks to consumers and can lead to significant public health issues.

Ensuring that backflow prevention devices are properly maintained and regularly tested is essential to prevent such failures. While issues like pressure loss, maintenance needs, and installation costs are important considerations, they do not directly address the primary function of these devices, which is to safeguard the water supply from contamination risks.