Plumbing Toilet Flush Volume Calculator
Reconcile actual dual-flush volumes and independent full/reduced counts, not nominal fixture label or equal-volume count multiplication.
Description
Dual-flush water use combines two flush volumes with their observed counts.
Dual-flush water use combines two flush volumes with their observed counts. Mean liters per flush is weighted by count.1
The returned values include Observed total toilet flush liters, Observed mean liters per flush. The How section below explains the calculation, input rules and interpretation.
When to use Plumbing Toilet Flush Volume Calculator
Use Plumbing Toilet Flush Volume Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No leakage, user behavior forecast or efficiency certification 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 Toilet Flush Volume 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 observedFullFlushLiters, observedReducedFlushLiters, observedFullFlushCount, observedReducedFlushCount using the field table and calculation rules, then run the tool.
- Read observedTotalToiletFlushLiters, observedMeanLitersPerFlush. 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 |
|---|---|---|---|
| observedFullFlushLiters | Observed full flush liters | number | Required |
| observedReducedFlushLiters | Observed reduced flush liters | number | Required |
| observedFullFlushCount | Observed full flush count | number | Required |
| observedReducedFlushCount | Observed reduced flush count | number | Required |
Enter nonnegative full and reduced volumes and integer counts 0–1000000 with positive combined count. Return total liters and weighted mean liters per flush.
total=fullLiters×fullCount+reducedLiters×reducedCount; mean=total/(fullCount+reducedCount) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedTotalToiletFlushLiters | Observed total toilet flush liters | number |
| observedMeanLitersPerFlush | Observed mean liters per flush | number |
{
"input": {
"observedFullFlushLiters": 6,
"observedReducedFlushLiters": 3,
"observedFullFlushCount": 4,
"observedReducedFlushCount": 6
},
"output": {
"observedTotalToiletFlushLiters": 42,
"observedMeanLitersPerFlush": 4.2
}
}Limitations and assumptions
No leakage, user behavior forecast or efficiency certification 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 Urinal Flush Volume Calculator: Urinal consumption combines counted occupant and purge flushes with continuous leakage over a recorded duration. For a complementary task, use Plumbing Dishwasher Water Usage Calculator: Dishwasher water inventory includes cycle consumption and independently observed pre-rinse volume. Place-setting exposure is a recorded total.
References
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Plumbing Toilet Flush Volume Calculator — tool.io
Similar or alternative tools
- Plumbing Urinal Flush Volume Calculator
Urinal consumption combines counted occupant and purge flushes with continuous leakage over a recorded duration.
- Plumbing Dishwasher Water Usage Calculator
Dishwasher water inventory includes cycle consumption and independently observed pre-rinse volume. Place-setting exposure is a recorded total.