Earlier editions: 2022
Chapter 7 — SANITARY DRAINAGE›Part I — DRAINAGE SYSTEMS
San Francisco Building Inspection Commission Codes § 710.0 Drainage of Fixtures Located Below the Next Upstream Manhole or Below…
San Francisco Building Inspection Commission Codes · 2026-08 edition · updated 2026-09-23 · San Francisco
Cite as: San Francisco Building Inspection Commission Codes § 710.0 · Text as of 2026-09-23
710.1.1 Add the following section:
710.1.1 Drainage of Fixtures Located Below the Fresh Air Inlet. Where a fixture is installed with the flood rim level equal to or lower than the elevation of the fresh air inlet serving the house trap, the piping serving the fixture shall be protected by installing an approved type of backwater valve. Where a fixture is installed with the flood rim level higher than the elevation of the fresh air inlet serving the house trap, the fixture shall not discharge through such backwater valve.
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