California Building Code §1219 (Excessive Pressure Relief Devices) and CA Health & Safety Code §19200-19205 require seismic gas shutoff valves at certain Carmichael properties on new construction, additions over $10,000, or when re-piping the gas line. Existing pre-1979 homes are not required to retrofit absent triggering work.
California Health & Safety Code §19200-19205 and California Plumbing Code §1218 require automatic gas shutoff valves activated by earthquake motion on: (1) new construction; (2) substantial additions/alterations over $10,000; (3) replacement of the gas service piping. The valve must be listed under ANSI Z21.70 and installed downstream of the gas meter. Sacramento County Building Permits Division verifies installation at gas inspection. The Sacramento County Code adopts these state requirements via SCC Title 16. The Hayward and West Napa faults pose moderate risk to Carmichael despite no Alquist-Priolo zones running through the community; PG&E does provide free seismic-valve training at safety fairs.
Failure to install required valve: building permit cannot be finaled. After-the-fact installation required plus inspection. Operating without a required valve creates negligence-per-se exposure if a post-quake gas leak causes injury or fire.
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