EFVs are mechanical shut-off devices that can be installed in the gas pipe running to the gas meter at your property (the “service line”). An EFV is designed to stop the flow of gas if the service line is broken, for example, by an excavation accident. Stopping the flow of gas from a broken service line significantly reduces the risk of natural gas fire, explosion, personal injury and/or property damage.

An EFV is not designed to close if a leak occurs beyond the gas meter (on house piping or appliances). The EFVs may not close if the leak on the service line is small.

Note: If you add additional gas appliances, for example, a pool heater, emergency generator, etc., the additional gas flow may cause the EFV to close.

If you choose to request the installation of an EFV, you may be responsible for paying the installation cost. The average cost is typically between $600 to $2,500 but the actual costs will depend on the difficulty of the installation. Corpus Christi Gas informs you of the actual cost before you make the final decision. If you notify Corpus Christi Gas that you want an EFV, a representative will contact you to set up a mutually agreeable date to install an EFV on your service line.

Note: EFVs cannot be installed on service lines with gas loads exceeding 1,000 SCFH, low pressure or other factors. If you request an EFV but your service line cannot accommodate an EFV, a representative will let you know.

EFV replacement or service may be necessary if you add additional gas appliances, such as a pool heater or emergency generator that exceeds the capacity of the EFV. The EFV replacement may also be necessary if the EFV malfunctions. If it becomes necessary to replace the EFV on your service line, Corpus Christi Gas will replace the EFV at no charge to you.