Seismic Gas Shutoff: Anaheim vs Fullerton
How do seismic gas shutoff rules compare between Anaheim, CA and Fullerton, CA?
Fullerton has fewer restrictions than Anaheim.
Anaheim, CA
Orange County
California Health and Safety Code 19200 through 19205 and the California Plumbing Code require seismic gas shutoff valves when a building is newly constructed or undergoes a substantial addition or alteration over 10,000 dollars. Anaheim enforces these standards through the Planning and Building Department at permit issuance.
View full Anaheim rules →Fullerton, CA
Orange County
California does not mandate seismic gas shutoff valves for existing single-family homes. Some Orange County cities require them upon property sale. SoCalGas recommends but does not require automatic shutoff valves. Installation requires a plumbing permit.
View full Fullerton rules →Key Facts Comparison
| Fact | Anaheim | Fullerton |
|---|---|---|
| - | - | |
| Mandatory | - | Not required in unincorporated OC |
| State Law | - | HSC 19180-19188 does not mandate |
| New Construction | - | Provisions required by code |
| Permit | - | Plumbing permit required |
| SoCalGas | - | Recommended, not required |
Highlighted rows indicate differences between cities.
Anaheim FAQ
Fullerton FAQ
Do I need a seismic gas shutoff valve?
Not mandatory in unincorporated OC. Some neighboring cities require them at point of sale. SoCalGas recommends installation. A plumbing permit is required.
How much does installation cost?
Typically $200 to $500 installed by a licensed plumber. The valve automatically shuts off gas during seismic events above a set threshold.
What should I do about gas after an earthquake?
If you smell gas or hear hissing, turn off gas at the meter manually. Call SoCalGas at 1-800-427-2200. Do not turn gas back on yourself — wait for SoCalGas.
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