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Seismic gas shutoff valves will help safeguard

seismic gas valve

In an effort to safeguard citizens and government facilities, the City of Mission Viejo installed seismic gas shutoff valves at all City facilities with gas. 

The valves will interrupt the gas supply to the building when a magnitude 5-6.0 earthquake is detected. When determined safe, staff will manually reset the valves. This proactive measure will protect the buildings and occupants in case of a large earthquake, drastically reducing the chance of a fire or explosion due to a ruptured gas line.  

The valves were installed at City Hall, the Mission Viejo Library, Marguerite Aquatics Center, YMCA, corporate yard, Mission Viejo Animal Services Center, Sierra Recreation Center and Montanoso Recreation Center.


Submitted by Simon Pinkas on Thu, 01/23/2020 - 8:43 pm


How about offering Seismic shut off valve for residential & shopping centers.

It would be more beneficial for more people than the $13M
that was spent of buying the golf course which only few use.

Submitted by City Staff on Tue, 01/28/2020 - 9:28 am


Seismic shutoff valves can be installed on residential gas lines as long as the valve is compatible with the gas line. The City recommends that you have a professional plumber install them. There is currently no City program to assist with this installation but you may wish to check with your gas company as they may offer an incentive program.

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