Before the test
Verify wet-well dimensions, use one level reference, note active pumps and valves, and allow levels to stabilize before recording.
Field calculator
Lift station drawdown calculations for field verification.
Estimate pump output from measured wet-well dimensions, level change, and elapsed time. The calculator accounts for incoming flow during the test.
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Calibrations & Controls
Lift Station Drawdown Field Estimate
Report generated: Generated when printed
Drawdown calculator
Calculate estimated pump output
Enter wet-well geometry, a fill observation, and a pump-on drawdown observation. Use consistent water-level reference points for both rise and drawdown measurements.
01Wet-well information
02Fill observation
03Drawdown observation
04Pumping rate
Enter the measurements below to create an estimate.
Add test details (optional)
These details are saved only in this browser until reset.
01 Wet-well information
02 Fill observation
Observe the incoming level rise with the pump off; use the same reference point.
03 Drawdown observation
Time only the steady pump-on drawdown interval.
Measurements are saved on this device until you reset the calculator.
Test details
Facility / lift station: —
Pump number(s) / equipment ID: —
Operating pumps during drawdown: —
Technician / operator: —
Test date: — | Test time: —
Field notes: —
Measure carefully. Interpret the result in context.
During the test
Keep inflow conditions as steady as practical, time consistent intervals, and repeat observations whenever conditions change.
What this estimate means
This is a field estimate based on assumed constant inflow and measured geometry. Irregular wet wells, changing inflow, turbulence, or timing error can affect results.
Need a documented flow verification?
Our team provides documented verification with calibrated instrumentation for regulated and audit-ready reporting.