Automatic gas shutoff valves are installed on buildings’ gas house line (the pipe between the gas meter and the building).
Expert Tip: Make sure you get your EQ Seismic Shutoff Valve installation permitted, for a Retrofit Companies to give you credit for having an existing seismic valve installed correctly, they need to be able to find a permit for it. The permit fee for a seismic shut off valve in the City of LA is $80, and for Santa Monica and West Hollywood it is $300. Its a very small permit so sometimes it is missed.
Multifamily Seismic Shutoff Valves. If you have multiple gas meters run from the same gas line, which is common in multifamily apartment buildings, sometimes you only need to install one seismic meter if they are arranged in an array. This can be significant savings, however, there is a big downside.
For EQ Seismic Meters, if they are not accessible, you should not run into this issue, but if they are hit or bumped hard, they will trigger and turn off the gas. A lot of homeowners don’t know that this is one of the most common reasons for problems with the gas not working. Consumers usually call the landlord, property management company, or Gas Company and complain that their gas is turned off. It is very easy to reset a tripped seismic shutoff valve yourself. All you need is a small screw driver, and to know where the meter is. They have Green and Red dots in a viewport. If the dot is red it is disabled- Green means it is on.
Cost $400-$500 per valve.