"Odor fade may cause the gas odor to diminish
so that it is NOT DETECTABLE"
(Source: The Gas Co. in 2009) Ask for free copy*

After the Northridge Quake, there were at least 17,000 documented, detectable gas leaks... Occupants were advised by The Gas Co. to evacuate the premises (L.A. Times 12/31/94)

What is not known by the public is how many undetectable gas
leaks created problems!

Why take a chance???

It's the law: (FREE copy L.A. City law and L.A. Fire Dept. "How to control gas") *Includes Gas Co. advice on how to detect undetectable gas leaks.

Little Firefighter Brand
The Only Nationally Certified Made in the USA
Earthquake Automatic Gas Valve With EZ Emergency Manual Shut OFF/On Gas Control in Seconds
30 Year Factory Warranty---Free No Obligation Estimate.

1-800-927-9594 24 Hrs.  Built in Gas Wrench Co. Ask for references
Les@WrenchFREEGasOFF.com

Note the gas co. does not recommend any brand valve or any valve installer.