Plumbing Water Hammer Arrestor Size Calculator
Screen independently established surge-energy/pressure envelope against caller verified arrestor tests, not fixture-count sizing or inferred transient water hammer; no mitigation/safety guarantee.
Description
An arrestor candidate needs both stored-energy capacity and a sufficient rated pressure.
An arrestor candidate needs both stored-energy capacity and a sufficient rated pressure. Both ratings must describe the supplied operating conditions.1
The returned values include Caller jointly compatible arrestor ids. The How section below explains the calculation, input rules and interpretation.
When to use Plumbing Water Hammer Arrestor Size Calculator
Use Plumbing Water Hammer Arrestor Size Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No transient simulation, location selection or manufacturer approval is inferred.
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 Water Hammer Arrestor 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 callerVerifiedArrestorIds, callerMatchedTestedSurgeEnergyJ, callerMatchedMaximumPressureKpa, callerIndependentlyEstablishedSurgeEnergyJ, observedSystemMaximumKpa using the field table and calculation rules, then run the tool.
- Read callerJointlyCompatibleArrestorIds. 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 |
|---|---|---|---|
| callerVerifiedArrestorIds | Caller verified arrestor ids | list of string | Required |
| callerMatchedTestedSurgeEnergyJ | Caller matched tested surge energy j | list of number | Required |
| callerMatchedMaximumPressureKpa | Caller matched maximum pressure kpa | list of number | Required |
| callerIndependentlyEstablishedSurgeEnergyJ | Caller independently established surge energy j | number | Required |
| observedSystemMaximumKpa | Observed system maximum kpa | number | Required |
Enter aligned nonempty unique nonblank IDs, nonnegative energy capacities, positive pressure ratings, nonnegative required energy and positive system pressure. Return every jointly eligible ID in original order.
eligible=(energyCapacity≥requiredEnergy) and (pressureRating≥systemPressure) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| callerJointlyCompatibleArrestorIds | Caller jointly compatible arrestor ids | list of string |
{
"input": {
"callerVerifiedArrestorIds": [
"a",
"b"
],
"callerMatchedTestedSurgeEnergyJ": [
10,
20
],
"callerMatchedMaximumPressureKpa": [
500,
800
],
"callerIndependentlyEstablishedSurgeEnergyJ": 15,
"observedSystemMaximumKpa": 600
},
"output": {
"callerJointlyCompatibleArrestorIds": [
"b"
]
}
}Limitations and assumptions
No transient simulation, location selection or manufacturer approval is inferred.
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 Air Chamber Size Calculator: A polytropic gas model estimates air-chamber compression as absolute pressure increases. The displaced gas volume is ideal water acceptance. For a complementary task, use Plumbing Anchor Force Calculator: Pressure thrusts resolve along explicit local planar reaction directions. Opposing thrusts can cancel in the resultant.
References
Similar or alternative tools
- Plumbing Air Chamber Size Calculator
A polytropic gas model estimates air-chamber compression as absolute pressure increases. The displaced gas volume is ideal water acceptance.
- Plumbing Anchor Force Calculator
Pressure thrusts resolve along explicit local planar reaction directions. Opposing thrusts can cancel in the resultant.