Plumbing Septic Tank Size Calculator
Budget actual mean wastewater observations and independent retention/sludge/emergency storage volumes; no minimum legal septic capacity, biological treatment or site approval.
Description
Septic storage combines liquid retention with separate sludge and emergency reserves.
Septic storage combines liquid retention with separate sludge and emergency reserves. Measured mean daily wastewater sets the liquid budget.1
The returned values include Caller liquid retention budget liters, Caller total septic tank budget liters. The How section below explains the calculation, input rules and interpretation.
When to use Plumbing Septic Tank Size Calculator
Use Plumbing Septic Tank Size Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No minimum legal capacity, treatment performance or site approval is inferred.
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 Septic Tank Size 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 observedWastewaterLitersPerDay, callerRetentionDays, callerSludgeReservedLiters, callerEmergencyReserveLiters using the field table and calculation rules, then run the tool.
- Read callerLiquidRetentionBudgetLiters, callerTotalSepticTankBudgetLiters. 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 |
|---|---|---|---|
| observedWastewaterLitersPerDay | Observed wastewater liters per day | list of number | Required |
| callerRetentionDays | Caller retention days | number | Required |
| callerSludgeReservedLiters | Caller sludge reserved liters | number | Required |
| callerEmergencyReserveLiters | Caller emergency reserve liters | number | Required |
Enter a nonempty nonnegative daily-volume list and nonnegative retention days and reserve liters. Return liquid retention and total tank budgets.
liquid=mean(dailyLiters)×retentionDays; total=liquid+sludgeReserve+emergencyReserve Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| callerLiquidRetentionBudgetLiters | Caller liquid retention budget liters | number |
| callerTotalSepticTankBudgetLiters | Caller total septic tank budget liters | number |
{
"input": {
"observedWastewaterLitersPerDay": [
100,
200
],
"callerRetentionDays": 2,
"callerSludgeReservedLiters": 100,
"callerEmergencyReserveLiters": 50
},
"output": {
"callerLiquidRetentionBudgetLiters": 300,
"callerTotalSepticTankBudgetLiters": 450
}
}Limitations and assumptions
No minimum legal capacity, treatment performance or site approval is inferred.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Plumbing Septic Drain Field Area Calculator: A drain-field area budget divides design wastewater by verified soil loading. An extra replacement reserve increases total land area. For a complementary task, use Plumbing Septic Percolation Area Calculator: A percolation result only maps to loading through a justified local calibration. Interpolation must stay within that supplied curve.
References
-
Plumbing Septic Tank Size Calculator — tool.io
Similar or alternative tools
- Plumbing Septic Drain Field Area Calculator
A drain-field area budget divides design wastewater by verified soil loading. An extra replacement reserve increases total land area.
- Plumbing Septic Percolation Area Calculator
A percolation result only maps to loading through a justified local calibration. Interpolation must stay within that supplied curve.