Major earthquakes could break home gas lines, releasing gas and causing fires. In fact, according to the California Seismic Safety Commission, natural gas is typically a factor in about one out of four fire ignitions following earthquakes.
Automatic Gas Shut off Valves (earthquake actuated valves), sense shaking in a building that is above a design level of shaking and automatically shut off the gas.
Installing an automatic gas shut off valve helps protect your home against gas-leak fires.
The red device is an Automatic Gas Shut Off Valve.