Which device is designed to keep backward flow of fire system water into the potable water system?

Which device is designed to keep backward flow of fire system water into the potable water system?

• A. Backflow Preventer
• B. Check Valve
• C. Rafter
• D. Bollard

Answer: (A)

Preventing contamination of drinking water by stopping any reverse flow from the fire protection system is the key idea. The device designed to keep backward flow of fire system water into the potable water system is the backflow preventer. It sits at the connection between the fire protection lines and the potable water supply and uses components like check valves and a relief mechanism to block any water from flowing back into the potable supply, even if fire system pressure drops or fluctuates. This protects the drinking water from cross-connection and back-siphonage. A plain check valve by itself can stop flow in one direction but may not provide full protection against all backflow scenarios or meet code requirements for cross-connections with fire systems. The other options, a rafter or a bollard, are unrelated to plumbing and backflow protection.

Preventing contamination of drinking water by stopping any reverse flow from the fire protection system is the key idea. The device designed to keep backward flow of fire system water into the potable water system is the backflow preventer. It sits at the connection between the fire protection lines and the potable water supply and uses components like check valves and a relief mechanism to block any water from flowing back into the potable supply, even if fire system pressure drops or fluctuates. This protects the drinking water from cross-connection and back-siphonage.

A plain check valve by itself can stop flow in one direction but may not provide full protection against all backflow scenarios or meet code requirements for cross-connections with fire systems. The other options, a rafter or a bollard, are unrelated to plumbing and backflow protection.