Section 01 · Spatial & Fluid Dynamics
The Plumber
Every drain line is a geometry problem solved against gravity. Pick a lab — slope, offset, DFU, pressure, or pipe sizing.
Water Supply Pipe Sizing Chart
WSFU → minimum pipe diameter (Hunter's curve, IPC §E202)
Demand never equals connected load — Hunter's probability curve converts WSFU to expected simultaneous flow.
Recommended service size
1-1/4"
| ≤ WSFU | Min size |
|---|---|
| 2 | 1/2" |
| 4 | 3/4" |
| 10 | 1" |
| 27 | 1-1/4" |
| 60 | 1-1/2" |
| 113 | 2" |