Standpipe Friction Loss

Formula and source

Total = elevation (0.434 psi/ft × height) + per-outlet friction + appliance friction. Min residual at the topmost outlet 100 psi for Class I per NFPA 14 §7.10.

NFPA 14 (2024) §7.10 (Pressure Limitations) by name and section.

Audience

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Posture

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