San Jose, CA Earthquake Safety: Seismic Gas Shutoff (2026)

Seismic gas shutoff valve requirements in San Jose follow the California Plumbing Code (CPC) and San Jose Municipal Code building provisions. An approved seismic gas shutoff valve or excess flow shutoff valve must be installed on new construction with gas piping and when existing buildings undergo certain permitted renovations. Point-of-sale requirements follow California Civil Code provisions requiring disclosure and, in many jurisdictions, installation. San Jose is located in a high seismic risk area near the Hayward and Calaveras faults, making gas shutoff valves particularly important. The valve must be installed downstream of the gas utility meter, rigidly mounted to the building exterior or other approved location. Valves must meet state certification requirements and carry manufacturer warranties. PG&E, the gas utility serving San Jose, provides guidance on gas safety during earthquakes and coordinates with the city on gas shutoff valve compliance. Installation requires a plumbing permit from the San Jose Building Division. Only state-approved valve models may be used.