In the city of Alameda, we have a new point of sale! Not only does a seller have to test their sewer line on homes 25 years or older, if it fails must be replaced, the seller now is required to install a gas service shutoff valve prior to close of escrow. There are some other cities in California that require this retrofit too. Soon, it will be a requirement for all California properties. Below is some information from PGE that might be helpful to all California Realtors. Manually turning off the gas service shutoff valve is the most common method (3 comments)