A Self Actuation Gas Line Safety Device
Okaloosa Gas is required by federal regulation to install an Excess Flow Valve (EFV) in all new or renewed natural gas service lines that serve a single-family residence. An EFV is a safety device inside the service line that shuts off the flow of natural gas in the case of excess flow traveling through the line.
FREQUENTLY ASKED QUESTIONS PERTAINING TO THE EFV:
WHAT IS AN EXCESS FLOW VALVE (EFV)?
An Excess Flow Valve, or EFV, is a device that automatically closes and restricts the flow of natural gas if an underground pipe is broken, completely cut, or torn apart. Such damage usually results from some type of excavation or digging. An EFV may also restrict the flow if the gas meter is damaged. This damage usually results from a vehicle impact.
WHERE IS AN EFV INSTALLED?
The EFV is installed on the service natural gas line that runs underground between the gas main (usually located in or near the street, alley or easement) and the Okaloosa Gas meter on the customer’s property.
WHAT DOES AN EFV DO?
Because the EFV restricts the flow of gas, it reduces the potential for fire-related property damage, personal injury and death. Installation of an EFV will not protect against customer appliance malfunction or customer houseline gas leaks, small punctures in the underground pipe, or gas meter leaks. An EFV may not protect against damage to pipelines from extreme weather conditions or flooding. It’s also important to understand that an EFV doesn’t shut off the flow of gas completely. Some leakage may still occur and result in a hazardous condition. Anyone performing an excavation is responsible for calling 811 for line spots and to contact Okaloosa Gas immediately to report any damage to the natural gas pipelines, no matter how small the damage might be.
WHY IS IT USED?
The Excess Flow Valve (EFV) is used to automatically stop the flow of gas in cases of a ruptured gas line. Broken gas lines can occur with excavation machinery, extreme ground movements (such as earthquakes), drilling, digging and other accidental breaks of natural gas lines or regulators.
HOW DOES IT WORK?
An EFV operates similar to electrical circuit breakers that trip when the electricity current exceeds its limit. The EFV is tripped by an excess flow of gas, causing the spring to shut-off the flow. The valve is reopened when the excess flow has ceased or the correct pressure is regained.
DOES MY SERVICE HAVE AN EFV?
If you had a new or replaced service line since February 1999 you have an EFV. Service lines installed by the District before February 1999 does not have an EFV.
Charges for the EFV installation will be determined and agreed upon installation.
If you’re interested in having an EFV installed at your residence, or if you’d like more information regarding the EFV please call us at 729-4700 or complete this form and someone will be contacting you.