Excess Flow Valve
We carefully maintain a network of natural gas mains and service pipelines that deliver safe and reliable natural gas to the communities we serve.
An excess flow valve is a supplemental mechanical device installed inside a natural gas distribution service line. If there is a significant increase in the flow of gas (e.g., due to a damaged line), the EFV will “trip” or close to minimize the flow of gas through service the line. Once the repair is made and the correct pressure is restored, the EFV automatically resets itself.
While the pipelines serving your community are already safe, federal code changes require that we let customers know about this supplemental device. An EFV is not required on existing natural gas service pipelines.
The cost to have an EFV installed at your premises is between $1,400 and $3,600.
If you’d like information about having an EFV installed on your service line, complete our excess flow valve form.