Wells & water/ CALCULATOR

Well-pump cycle-rate screening

Estimate one pressure-tank draw-and-refill cycle under a steady water demand below pump capacity.

Use published or measured drawdown between the actual cut-out and cut-in settings.
Use flow at the system operating head, not an unrestricted maximum-flow label.
This model requires demand to remain below pump delivery.
Pump-off draw time

1.50 min

Pump-on refill time

1.50 min

Complete cycle time

3.00 min

Estimated starts per hour

20.0 starts/h

Pump run time per hour

30.0 min/h

Constant demand, constant pump delivery, full usable drawdown each cycle and no variable-speed control. Real fixtures vary, switch and tank behavior have tolerances, and pump manufacturers set allowable starts and minimum run time. Treat the result as a diagnostic screen, not a control setting.

FROM ESTIMATE TO ACTION

Use the result, not just the number.

01

Verify the inputs

Measure or document each input. If a value is only an estimate, record its source and test a conservative alternative.

02

Keep the calculation traceable

Save the input link or copied result together with the date, units and assumptions. A number without its inputs cannot be checked later.

03

Confirm the decision

Compare the estimate with the related guide, current product data and requirements that apply at your location before buying or building.

Inputs to verify

Usable tank drawdown (L)
Use published or measured drawdown between the actual cut-out and cut-in settings.
Pump delivery at operating head (L/min)
Use flow at the system operating head, not an unrestricted maximum-flow label.
Steady demand during screen (L/min)
This model requires demand to remain below pump delivery.

Continue your calculation