Friction pressure loss in psi (and feet of head) over a pipe run by the Hazen-Wi
Friction pressure loss in psi (and feet of head) over a pipe run by the Hazen-Williams formula, from flow, size and C factor.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
334 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://plumbing-calc.x402tookit.com/pressure-loss
| Category | Everything else |
|---|---|
| Provider host | plumbing-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.02 | 334 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"flowGpm": 10,
"lengthFeet": 100,
"material": "copper-l",
"nominalSize": "3/4"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"cFactor": {
"description": "Hazen-Williams C: 140 copper, 150 PVC (defaults), 100 old steel",
"type": "number"
},
"flowGpm": {
"description": "Flow in US gallons per minute",
"type": "number"
},
"insideDiameterInches": {
"description": "Inside diameter in inches",
"type": "number"
},
"lengthFeet": {
"description": "Pipe length in feet (add equivalent length of fittings if you know it)",
"type": "number"
},
"material": {
"description": "copper-l or pvc-40 (default copper-l)",
"type": "string"
},
"nominalSize": {
"description": "Nominal size such as 3/4 (with material), or insideDiameterInches",
"type": "string"
}
},
"required": [
"flowGpm",
"lengthFeet"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"cFactor": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"feetOfHeadLoss": {
"type": [
"null",
"number"
]
},
"flowGpm": {
"type": [
"null",
"number"
]
},
"insideDiameterInches": {
"type": [
"null",
"number"
]
},
"kilopascalsLoss": {
"type": [
"null",
"number"
]
},
"lengthFeet": {
"type": [
"null",
"number"
]
},
"lossIfFlowDoubled": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"pipe": {
"type": [
"null",
"string"
]
},
"psiPer100Feet": {
"type": [
"null",
"number"
]
},
"psiPerFoot": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"totalPsiLoss": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}