Plumbing Drainage Fixture Units To Gpm Calculator
Interpolate actual branch drainage fixture-unit demands using independently verified caller DFU→GPM table; simultaneous branch sum explicitly assumed, not universal supply Hunter units or jurisdiction code.
Description
Drainage fixture units map to estimated GPM through a verified table.
Drainage fixture units map to estimated GPM through a verified table. Summing independently estimated branch flows assumes they occur together.1
The returned values include Caller interpolated branch gpm, Sum independent branch gpm. The How section below explains the calculation, input rules and interpretation.
When to use Plumbing Drainage Fixture Units To Gpm Calculator
Use Plumbing Drainage Fixture Units To Gpm Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No universal supply Hunter curve, diversity correction or jurisdictional code table 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 Drainage Fixture Units To Gpm 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 callerObservedDrainageFixtureUnitsByBranch, callerVerifiedDfuKnots, callerVerifiedBranchGpmKnots using the field table and calculation rules, then run the tool.
- Read callerInterpolatedBranchGpm, sumIndependentBranchGpm. 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 |
|---|---|---|---|
| callerObservedDrainageFixtureUnitsByBranch | Caller observed drainage fixture units by branch | list of number | Required |
| callerVerifiedDfuKnots | Caller verified dfu knots | list of number | Required |
| callerVerifiedBranchGpmKnots | Caller verified branch gpm knots | list of number | Required |
Enter nonnegative branch fixture units and nonnegative calibration values. For each query require aligned calibration lists with at least two strictly increasing DFU knots and an in-range query. Return branch GPM and their sum; an empty branch list returns empty results and zero without interpolating.
branchGpm_i=linearInterpolation(DFUKnots,GPMKnots,DFU_i); total=sum(branchGpm) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| callerInterpolatedBranchGpm | Caller interpolated branch gpm | list of number |
| sumIndependentBranchGpm | Sum independent branch gpm | number |
{
"input": {
"callerObservedDrainageFixtureUnitsByBranch": [
2,
4
],
"callerVerifiedDfuKnots": [
0,
4,
8
],
"callerVerifiedBranchGpmKnots": [
0,
10,
16
]
},
"output": {
"callerInterpolatedBranchGpm": [
5,
10
],
"sumIndependentBranchGpm": 15
}
}Limitations and assumptions
No universal supply Hunter curve, diversity correction or jurisdictional code table 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 Drain Pipe Sizing Calculator: Drain-pipe capacities depend on matched slope and roughness. Peak waste demand can screen a verified catalog directly. For a complementary task, use Plumbing Vent Pipe Sizing Calculator: Vent selection compares served fixture units and developed length against a caller catalog. A candidate must satisfy both limits.
References
Similar or alternative tools
- Plumbing Drain Pipe Sizing Calculator
Drain-pipe capacities depend on matched slope and roughness. Peak waste demand can screen a verified catalog directly.
- Plumbing Vent Pipe Sizing Calculator
Vent selection compares served fixture units and developed length against a caller catalog. A candidate must satisfy both limits.