Where is an earthquake safe valve typically installed?

The installation of an earthquake safe valve is particularly critical in areas prone to seismic activity. This type of valve is designed to automatically shut off the gas supply in the event of an earthquake, thereby reducing the risk of gas leaks and potential fires.

For optimal safety, these valves are installed before the shut-off valve for gas. By placing the earthquake safe valve in this position, it can effectively monitor the gas line for unusual activity or pressure changes that may suggest a rupture. If an earthquake occurs, the valve can promptly close off the gas supply, ensuring immediate action before any potential damage can escalate.

The other locations mentioned do not offer the same level of proactive safety. For example, placing an earthquake valve after the gas meter will not serve its purpose effectively since it would allow gas to continue flowing in the event of a seismic incident. Similarly, the water heater location, though critical for gas safety, is not the optimal point to proactively shut off gas before other appliances can be affected. Lastly, under the sink is typically not related to gas supply systems, further underscoring that the most effective placement of the earthquake safe valve is before the shut-off valve for gas.