1103.1 Vertical Conductors and Leaders — 2025 California Plumbing Code
California Plumbing Code (Title 24, Part 5) · 2025 edition · updated 2026-09-25 · California
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Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Plumbing Code (Title 24, Part 5) § 1103.1 · Effective January 1, 2026 · Official source: Building Standards Commission
Vertical conductors and leaders shall be sized by the maximum projected roof area and Table 1103.1.
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