An Excess Flow Valve (EFV) is a mechanical shut-off device that can be installed in the gas pipe running from the gas main to the gas meter on 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. It should be noted that EFVs generally do not protect against slow leaks such as those caused by corrosion, loose fittings, or leaks beyond the gas meter (house piping). You may request that (SCUD) install an excess flow valve (EFV) on the gas line to your property. If you notify us that you want an EFV, we will contact you to set up a mutually agreeable date when we will install an EFV on your service line.
If an EFV is installed on an existing service, we will install the EFV as close to the gas main as possible without removing asphalt. However, the installation will require SCUD to excavate a small area on your property. You will be charged the current EFV Installation Fee to cover the cost of installing the EFV prior to installation. On new services, the EFV is included with the initial installation charge for a new gas service. If it becomes necessary to replace the EFV on your service line due to the addition of gas load at the location, you may be charged the current EFV Installation Fee.
EFVs cannot be installed on some service lines due to high gas flow, low pressure, or other factors. If you request an EFV, but your service line cannot accommodate an EFV, we will let you know.
If an EFV is tripped and closes as expected, SCUD personnel will reset the EFV and place the gas service back in normal operation.
Frequently Asked Questions
What won’t an EFV do?
EFVs are not designed to close if a leak occurs beyond the gas meter (on house piping or appliances). EFVs also may not close if the leak on the service line is small.
Will the EFV accidently close and shut off my gas?
If you add additional gas appliances, for example, a pool heater, emergency generator, etc., the additional gas flow may cause the EFV to close. To prevent unwanted closure, it may become necessary for you to replace the EFV for one with a larger capacity. For this reason, it is always a good idea to contact SCUD before adding appliances such as these.
What happens if the EFV malfunctions?
EFV replacement may be necessary if the EFV malfunctions (sticks open or closed). However, industry experience is that EFVs rarely malfunction. There is no charge to the customer if an EFV requires replacement due to malfunction.
Will the EFV require replacement if it is tripped?
No. EFVs that are tripped can be easily reset by qualified personnel.