California law requires licensed professionals to install earthquake automatic shut-off valves on natural gas systems. DIY installation violates building codes, voids manufacturer warranties, and creates serious safety risks.
Gas line work requires specific tools, knowledge of pressure testing, and understanding of local code requirements. Improper installation can cause gas leaks, valve malfunctions, or failure during actual earthquakes when you need protection most.
Licensed installers also handle permits, inspections, and provide proper documentation for insurance purposes. The cost of professional installation is worth the safety and legal compliance you receive.