Excess flow valves

 Excess flow valves

natural gas workers with excess flow valve

An excess flow valve (EFV) is an enhanced safety device designed to automatically close and restrict natural gas flow if the service line or meter is severely punctured or damaged, causing a major pressure drop.

Excavation is the primary cause of damage. It’s best to contact 811 before you dig to have your utility lines marked for free.

An excess flow valve will not protect against leaks inside a home or business, such as an appliance malfunction. If you smell natural gas inside your home, leave immediately and call 911 from a safe distance. 

Where is the EFV installed?
The EFV is inserted in your natural gas service line by a qualified installer contracted by Colorado Springs Utilities. The line runs underground from the natural gas main line to your meter.  Sometimes, an EFV cannot be installed because of high gas flow, low pressure or other factors.

Excess Flow Valve diagram


How do I know if I have an excess flow valve?
Excess flow valves are installed in homes built after October 2010 or when natural gas service lines are replaced.

If I don’t have an excess flow valve, is it necessary? 
We operate and maintain a safe natural gas system. An excess flow valve is not required on existing natural gas service lines. Federal code requires us to let our customers know about this optional device.

How much does the optional valve cost and who is responsible for payment?
Most installations range between $1,200 to $1,600 depending on the excavation and restoration required for a premise. The homeowner is responsible for the full amount before the EFV is installed. 

If you request an EFV, we will make a site visit to determine if it can be installed on your natural gas service line, give you a cost estimate and schedule a convenient installation date and time.  Any disturbance to existing landscape during the installation will be restored.

There is no additional cost to the customer for maintenance of the excess flow valve.

Why do I have to pay for the excess flow valve?
We are required by federal regulations to install an excess flow valve on all new or replaced natural gas service lines. The initial cost of the EFV installation is included in the charge for a new or replaced service line. Where these EFVs were not previously installed, it is the customer’s option to have the device installed at their expense. 

Will installation interrupt my natural gas service?
We temporarily interrupt natural gas service to your home, typically for a few hours. We will need limited access to your home (inside and out), and someone 18 years or older needs to be present to permit us to relight appliance pilots and conduct a safety check. 

If you have questions, need additional information or would like to request an excess flow valve, please send us an email.