If a meter is oversized, what could occur?

• A. The meter will over-register at high flows
• B. The meter will register only at extreme flows
• C. The meter will under register or not register anything at low flows
• D. The meter will re-calibrate automatically

Answer: (C)

When a meter is larger than the service it serves, the metering mechanism needs a higher flow to start moving and keep registering accurately. This creates a higher minimum flow (Qmin) for the meter to register. At low usage, the flow may be below that threshold, so the meter may under-register or not register at all. It can still measure correctly at higher flows where the water velocity is sufficient to drive the meter properly. Automatic re-calibration isn’t a feature of the meter’s behavior, and over-registering at high flows isn’t the typical outcome for an oversized meter.