Plumbing Grease Interceptor Size Calculator
Budget actual kitchen discharges under caller concurrency/retention/usable volume assumptions; not hydraulic grease separation efficiency, universal fixture-code interceptor sizing or sanitation approval.
Description
Interceptor retention volume depends on concurrent kitchen discharge and required holding time.
Interceptor retention volume depends on concurrent kitchen discharge and required holding time. Usable fraction converts that to nominal storage.1
The returned values include Caller concurrent kitchen flow liters minute, Required usable retention liters, Required nominal interceptor liters. The How section below explains the calculation, input rules and interpretation.
When to use Plumbing Grease Interceptor Size Calculator
Use Plumbing Grease Interceptor Size Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No grease separation performance, fixture-code table or sanitation approval 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 Grease Interceptor 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 observedKitchenDischargesLitersMinute, callerPeakConcurrencyFractions, callerVerifiedRetentionMinutes, callerUsableGreaseInterceptorFraction using the field table and calculation rules, then run the tool.
- Read callerConcurrentKitchenFlowLitersMinute, requiredUsableRetentionLiters, requiredNominalInterceptorLiters. 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 |
|---|---|---|---|
| observedKitchenDischargesLitersMinute | Observed kitchen discharges liters minute | list of number | Required |
| callerPeakConcurrencyFractions | Caller peak concurrency fractions | list of number | Required |
| callerVerifiedRetentionMinutes | Caller verified retention minutes | number | Required |
| callerUsableGreaseInterceptorFraction | Caller usable grease interceptor fraction | number | Required |
Enter aligned nonempty nonnegative discharge flows and concurrency fractions 0–1, positive retention minutes and usable fraction in (0,1]. Return concurrent flow, usable liters and nominal liters.
flow=sum(discharge_i×concurrency_i); usable=flow×retention; nominal=usable/usableFraction Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| callerConcurrentKitchenFlowLitersMinute | Caller concurrent kitchen flow liters minute | number |
| requiredUsableRetentionLiters | Required usable retention liters | number |
| requiredNominalInterceptorLiters | Required nominal interceptor liters | number |
{
"input": {
"observedKitchenDischargesLitersMinute": [
10,
20
],
"callerPeakConcurrencyFractions": [
1,
0.5
],
"callerVerifiedRetentionMinutes": 2,
"callerUsableGreaseInterceptorFraction": 0.8
},
"output": {
"callerConcurrentKitchenFlowLitersMinute": 20,
"requiredUsableRetentionLiters": 40,
"requiredNominalInterceptorLiters": 50
}
}Limitations and assumptions
No grease separation performance, fixture-code table or sanitation approval is supplied.
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 Interceptor Oil Separation Efficiency Calculator: Oil-removal efficiency compares paired inlet and outlet inventories. Matched water volumes provide mass weights for the pooled result. For a complementary task, use Plumbing Septic Tank Size Calculator: Septic storage combines liquid retention with separate sludge and emergency reserves. Measured mean daily wastewater sets the liquid budget.
References
Similar or alternative tools
- Plumbing Interceptor Oil Separation Efficiency Calculator
Oil-removal efficiency compares paired inlet and outlet inventories. Matched water volumes provide mass weights for the pooled result.
- Plumbing Septic Tank Size Calculator
Septic storage combines liquid retention with separate sludge and emergency reserves. Measured mean daily wastewater sets the liquid budget.