Yes – but only if the city or jurisdiction that the mobile (or modular or manufactured) home is located in requires it, ie city of Los Angeles, Malibu, Culver City, San Fernando etc. Here is a list of cities that require an installed seismic earthquake shut off valve when selling.
Here is the verbiage for the city of Los Angeles – Buildings or structures which contain fuel gas piping shall have a seismic gas shutoff valve or excess flow shutoff valve installed.
All dwellings, buildings and structures – including mobile homes, manufactured homes and modular homes – located in the city of Los Angeles, are required to have a seismic earthquake shut off valve when selling. The city of LA code is also here, under item #4. Also, it does not matter if the land is owned or leased.
Mobile homes located in the unincorporated areas of Los Angeles County are not required to have a seismic earthquake shut off valve installed.
Here is a photo of an installed seismic earthquake shut off valve on a gas meter for a mobile home. The seismic valve goes between the gas meter and the flexible gas line that leads into the undercarriage of the mobile home.
Call us with any questions about this requirement at 310-800-4418.