Excess Flow Valve
An Excess Flow Valve (EFV) is a mechanical device installed inside a natural gas distribution service line between the street and meter.
EFVs are designed to shut off the flow of natural gas automatically if the service pipe breaks between the main in the street and the gas meter. EFVs do not stop the flow of gas for any leaks or faulty equipment on the customer’s side of the gas meter, and are designed so that general usage, such as turning on appliances, will not trip the valve.
Recent changes in federal regulations require natural gas system operators to provide notification to all of their customers of their right to have an EFV installed on their service if one does not already exist, and if the service allows for the proper installation of this device. These devices are installed on all new gas services lines, and many existing services are already equipped with them. EFVs are not installed on service lines that operate at pressures less than 10 psig, or large service lines with high gas flow rates. Certain other conditions may also prohibit the installation of an EFV.
If an existing service line is not already equipped with an EFV, we will install an EFV on an existing eligible gas service line upon request by the customer at a mutually agreed date. To install the excess flow valve, we will excavate the service line at its connection to the gas mainline piping that runs down your street. We will then turn off your gas service line, install the excess flow valve, backfill the excavation and relight your appliances. Typically, within a few months our restoration contractor will return to restore the excavation to a permanent condition. Under certain conditions we may need to replace your entire gas service at no additional cost.
Since an excess flow valve must be sized to operate properly under current load conditions, any significant load changes that would require a larger meter, such as installing an emergency generator or pool heater, may also require the replacement of the EFV at an additional cost.
The cost to install an EFV on an existing gas service is typically between $2,300-$6,200, depending upon a variety of conditions. However, at the time of the posting of this notice, the Connecticut Public Utilities Regulatory Authority has not determined who will be responsible for the costs of installing these devices. As such, we are currently gathering the names and contact information of those customers who may have interest in the potential installation of this device, and shall communicate with each of these customers once a regulatory decision is reached.
For more information, or to place your name on the contact list, please call 203.795.7712.