Compare one state/local authority or approved-design minimum liquid volume and compartment count with an exact candidate while preserving the responsible design-flow record and withholding permit conclusions.
A quick decision brief for this specific tool
One de-identified onsite record; named state/local authority minimum-sizing, property/system classification, responsible design-flow and exact candidate-tank records; one paired GPD/gallon or litre-per-day/litre unit system; positive documented flow/volumes; and positive whole required/candidate compartment counts
Source-preserving design-flow context, authority/design minimum liquid volume and compartment count, exact candidate values, signed candidate-minus-minimum liquid-volume difference and signed compartment-count difference
Copy the already established design-flow and authority/design minimum records, then subtract only the minimum liquid volume and required compartment count from the exact candidate values; do not infer flow from bedrooms/occupancy, apply a universal detention factor, choose a tank/system or declare adequacy/permit compliance
Choose your path
Compare one authority- or design-selected septic-tank minimum liquid volume and compartment count with one exact candidate while preserving the responsible design-flow record and withholding system or permit conclusions.
Preserve the controlling jurisdiction, classification and design-flow revision instead of relying on a generic bedroom table.
Name the authority, classification, flow and candidate records; choose one paired unit system; inspect both signed differences.
Can reconcile the candidate while site, treatment/dispersal design, product approval and permit acceptance remain in the complete submission.
Distinguish minimum liquid capacity and compartment configuration across the exact property/use class.
Select authority or permit basis, copy the already approved design flow/minimum/count and compare the exact candidate submittal values.
Sees source-preserving arithmetic without an adequate, undersized, inspection or approval verdict.
Understand why online national averages cannot replace the local health/permitting process.
Use a de-identified education record in gallons or litres, including a candidate with negative differences, then review the exclusions and authority links.
Can assemble the required records without treating current occupancy, pumping frequency or a bedroom estimate as a permitted design.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
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Jurisdictions distinguish residential/nonresidential classes, design-flow methods, bedroom or occupancy definitions and tank configurations. This tool inserts no national table.
Minimum liquid volume and required compartments = values copied from the named current authority/design recordThe flow value is retained for audit context only. Bedrooms, current occupancy, metered use and a fixed detention period are not converted into design flow or tank volume here.
Documented design flow = copied GPD or L/day from the responsible scheduleSigned differences expose the submitted arithmetic without deciding adequacy, product approval, treatment/dispersal suitability, installation acceptance or permit compliance.
Volume difference = candidate liquid volume − minimum; compartment difference = candidate count − required countUpdated: August 2026
A designer names the jurisdiction, classification and approved design-flow revision, then compares the exact candidate's liquid volume and compartments with the copied minimums.
A reviewer uses the governing facility classification and already established design flow rather than applying a residential bedroom rule or fixed retention multiplier.
A property owner enters L/day and litres from a de-identified exercise, sees negative candidate differences preserved, and takes the record to the local authority or qualified professional.
Start with the controlling state/local authority or approved design—not a national bedroom average. Preserve the exact property/system classification, already established design flow, minimum liquid volume and compartment requirement, then compare one documented candidate in paired US or metric units. The record does not select a tank/system or approve a permit.