Excess Flow Valve (EFV)
An EFV is a self actuating safety device that prevents unplanned, excessive gas flow from the gas service line into a home or building, typically caused by excavation damage.
An EFV isn't required for normal, safe operation of the service line. However, any customer can request one for service lines that are not newly installed or replaced. Nephi City Gas has been routinely installing these devices as part of the ongoing Pipeline Infrastructure Replacement.