Plumbing Sump Pump Capacity Calculator
Budget measured steady sump inflow against caller duty and usable cycle volume, no pump discharge-head inference or basement flood guarantee.
Description
A sump cycle alternates filling while the pump is off and net draining while it is on.
A sump cycle alternates filling while the pump is off and net draining while it is on. A chosen on-time fraction determines pump capacity for steady inflow.1
The returned values include Required on cycle pump liters minute, Modeled sump pump cycle minutes. The How section below explains the calculation, input rules and interpretation.
When to use Plumbing Sump Pump Capacity Calculator
Use Plumbing Sump Pump Capacity Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No pump head, varying inflow or flood protection guarantee is supplied.
Prepare measured flows, pressures, temperatures or inventories with consistent units. For catalog tools, use independently verified capacities at the stated operating conditions and supply the explicit design demand.
How to use Plumbing Sump Pump Capacity Calculator and understand its results
- Prepare measured flows, pressures, temperatures or inventories with consistent units. For catalog tools, use independently verified capacities at the stated operating conditions and supply the explicit design demand.
- Enter observedSumpInflowLitersMinute, callerPumpRunFraction, callerUsableSumpCycleLiters using the field table and calculation rules, then run the tool.
- Read requiredOnCyclePumpLitersMinute, modeledSumpPumpCycleMinutes. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| observedSumpInflowLitersMinute | Observed sump inflow liters minute | number | Required |
| callerPumpRunFraction | Caller pump run fraction | number | Required |
| callerUsableSumpCycleLiters | Caller usable sump cycle liters | number | Required |
Enter positive inflow and usable cycle liters, plus an on-time duty fraction strictly between zero and one. Divide inflow by duty to obtain required pump flow. Compute off-time as volume/inflow and on-time as volume/(pump−inflow); add them for the cycle duration. Return required pump L/min and total cycle minutes. The component on/off times are intermediate calculations.
pump=inflow/duty; off=volume/inflow; on=volume/(pump−inflow); cycleMinutes=off+on Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| requiredOnCyclePumpLitersMinute | Required on cycle pump liters minute | number |
| modeledSumpPumpCycleMinutes | Modeled sump pump cycle minutes | number |
{
"input": {
"observedSumpInflowLitersMinute": 10,
"callerPumpRunFraction": 0.5,
"callerUsableSumpCycleLiters": 20
},
"output": {
"requiredOnCyclePumpLitersMinute": 20,
"modeledSumpPumpCycleMinutes": 4
}
}Limitations and assumptions
No pump head, varying inflow or flood protection guarantee is supplied.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Plumbing Ejector Pump Capacity Calculator: A sewage ejector cycle alternates filling and net draining. Cycle frequency depends on measured inflow, pump rate and usable wetwell volume. For a complementary task, use Plumbing Rainwater Harvesting Tank Size Calculator: Rainwater inventory depends on the chronological collection and withdrawal ledger. Starting empty exposes withdrawals that cannot be served.
References
-
Plumbing Sump Pump Capacity Calculator — tool.io
Similar or alternative tools
- Plumbing Ejector Pump Capacity Calculator
A sewage ejector cycle alternates filling and net draining. Cycle frequency depends on measured inflow, pump rate and usable wetwell volume.
- Plumbing Rainwater Harvesting Tank Size Calculator
Rainwater inventory depends on the chronological collection and withdrawal ledger. Starting empty exposes withdrawals that cannot be served.