Plumbing Drain Pipe Sizing Calculator

Screen actual drain pipe SKU matched slope/roughness capacity against measured waste flow; not water supply capacity, universal fixture-unit sizing or overflow safety guarantee.

Description

Drain-pipe capacities depend on matched slope and roughness.

Drain-pipe capacities depend on matched slope and roughness. Peak waste demand can screen a verified catalog directly.^[1]

The returned values include Caller compatible candidate ids, Signed candidate capacity margins liters second. The How section below explains the calculation, input rules and interpretation.

When to use Plumbing Drain Pipe Sizing Calculator

Use Plumbing Drain Pipe Sizing Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No automatic fixture-unit conversion, universal sizing table or overflow safety guarantee 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 Drain Pipe Sizing 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 callerDrainPipeSkuIds, callerVerifiedMatchedDrainageCapacityLitersSecond, callerMeasuredPeakWasteLitersSecond using the field table and calculation rules, then run the tool.
Read callerCompatibleCandidateIds, signedCandidateCapacityMarginsLitersSecond. 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
callerDrainPipeSkuIds	Caller drain pipe sku ids	list of string	Required
callerVerifiedMatchedDrainageCapacityLitersSecond	Caller verified matched drainage capacity liters second	list of number	Required
callerMeasuredPeakWasteLitersSecond	Caller measured peak waste liters second	number	Required

Enter aligned nonempty unique nonblank SKU IDs and nonnegative capacities, plus nonnegative measured peak waste flow. Return all adequate IDs and signed L/s margins.

margin=capacity−peakWaste; eligible=margin≥0

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
callerCompatibleCandidateIds	Caller compatible candidate ids	list of string
signedCandidateCapacityMarginsLitersSecond	Signed candidate capacity margins liters second	list of number

json

{
  "input": {
    "callerDrainPipeSkuIds": [
      "a",
      "b",
      "c"
    ],
    "callerVerifiedMatchedDrainageCapacityLitersSecond": [
      5,
      10,
      20
    ],
    "callerMeasuredPeakWasteLitersSecond": 8
  },
  "output": {
    "callerCompatibleCandidateIds": [
      "b",
      "c"
    ],
    "signedCandidateCapacityMarginsLitersSecond": [
      -3,
      2,
      12
    ]
  }
}

Limitations and assumptions

No automatic fixture-unit conversion, universal sizing table or overflow safety guarantee 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 Drainage Fixture Units To Gpm Calculator: Drainage fixture units map to estimated GPM through a verified table. Summing independently estimated branch flows assumes they occur together. For a complementary task, use Plumbing Sewer Velocity At Full Flow Calculator: The SI Manning equation estimates gravity-driven full circular-pipe velocity using hydraulic radius D/4. This assumption differs from pressurized flow.

References

Plumbing Drain Pipe Sizing Calculator — tool.io

Similar or alternative tools

Plumbing Drainage Fixture Units To Gpm Calculator
Drainage fixture units map to estimated GPM through a verified table. Summing independently estimated branch flows assumes they occur together.
Plumbing Sewer Velocity At Full Flow Calculator
The SI Manning equation estimates gravity-driven full circular-pipe velocity using hydraulic radius D/4. This assumption differs from pressurized flow.