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Plumbing & Pipe Flow Calc – Flow Velocity
x402
Plumbing & Pipe Flow Calc – Flow Velocity is a paid API for AI agents from plumbing-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Calculates water velocity in feet per second from flow rate and pipe size, or calculates the flow a pipe carries at a given velocity, for copper Type L or PVC Schedule 40 pipe.
Price / call$0.02
Success—
StatusUnknown
How this service works
Water velocity in feet per second from flow in gpm and pipe size, or the flow a pipe carries at a chosen velocity.
Output
Returns an object with velocity in feet per second and meters per second (or flow in GPM and liters per minute if velocity was the input), along with inside diameter in inches, flow area in square feet, flow in cubic feet per second, a text summary of the result, the pipe description, and a disclaimer. Also includes degraded flag and any reasons or notes about the calculation.
Example use cases
Residential plumbing velocity check
“I'm sizing a water supply line — what velocity will I get with 6 gpm through a 1/2 inch copper Type L pipe?”
PVC irrigation line flow rate
“If I want water moving at 5 feet per second through a 1 inch PVC Schedule 40 pipe, how many gallons per minute does that work out to?”
Custom pipe diameter calculation
“I have a pipe with an inside diameter of 1.05 inches and I'm pushing 10 gpm through it — what's the velocity in feet per second?”
Technical details
Endpoint
GEThttps://plumbing-calc.x402tookit.com/flow-velocity?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to compute water velocity from a known flow rate and pipe size, or to find the flow rate that corresponds to a target velocity in a standard copper Type L or PVC Schedule 40 pipe. It is the right choice for residential or light commercial plumbing design, irrigation system checks, or any hydraulic calculation involving standard US pipe sizes. Prefer it over pressure-loss or pipe-sizing sibling endpoints when your primary question is specifically about velocity or flow rate in an already-known pipe.
Side effects
- Missing both flowGpm and velocityFps — exactly one must be provided
- Missing both nominalSize/material and insideDiameterInches — one must be provided to identify the pipe
- Invalid material string not matching 'copper-l' or 'pvc-40' may produce an error or fall back to default
- Non-standard nominal size string that doesn't match known pipe tables may return an error
- Providing both flowGpm and velocityFps may cause ambiguity or an error
- Very large or zero flow/velocity values may return degraded results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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