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.
Pipe Slope Simulator
Drop (in) = Run (ft) × Pitch (in/ft)
Drain lines must fall just enough to keep solids suspended. Too flat clogs; too steep leaves them behind.
Total Drop
5.00"
Slope %
2.08%
Drains properly — self-scouring velocity (~2 ft/s)
Sweet spot: 1/8"–1/4" per ft maintains 2 ft/s scouring flow.
Visual drop is exaggerated 6× for clarity.