How can you minimize risk of backflow when connecting to a live hydrant?

• A. Open hydrant fully.
• B. Bypass all safety devices.
• C. Use backflow prevention devices as required and maintain proper valve sequencing; follow local procedures.
• D. Ignore local procedures.

Answer: (C)

Preventing backflow when connecting to a live hydrant focuses on keeping the potable water supply from being contaminated by reverse flow. The safest and most reliable way is to use backflow prevention devices as required and to follow proper valve sequencing and local procedures. Backflow prevention devices create a physical barrier that stops water from flowing backward into the public supply, even if pressure changes occur in the piping. Valve sequencing ensures you isolate the connection correctly, control the flow, and avoid creating a path that could draw contaminated water back into the system. Following local procedures ensures you’re using the right equipment, performing the correct steps, and meeting code requirements, including any testing or draining steps that keep the system protected. Open hydrants or bypassing safety devices remove those protections and increase the risk of contaminating the potable supply, while ignoring procedures can lead to improper setup and unsafe conditions.