During operation, why are gauges monitored when opening discharge lines?

• A. Gauges and target pressures/TDH
• B. Ambient temperature sensors
• C. Color of water
• D. Time of day

Answer: (A)

Discharge gauges are watched to verify the pump is delivering the correct pressure to meet the system’s demand. When discharge lines are opened, the system presents a total dynamic head (TDH) that the pump must overcome. The gauges provide real‑time pressure readings so you can compare them to the target pressures and ensure the pump is producing enough head and flow to satisfy the system. If readings are too low, the system isn’t being pressurized enough; if too high, you may be overpressurizing or stressing components. The other options don’t reflect the pump’s performance or the system’s demand, so they don’t help ensure proper operation.