Excess Flow Valves

Since 2017, MGE has proactively installed excess flow valves (EFVs) on all new or replaced natural gas service lines where required by federal regulations. This includes service lines serving single-family homes, multifamily properties with natural gas loads under 1,000 cubic feet per hour and small business customers with similar loads. EFVs are installed before these service lines are activated to enhance safety and to comply with the performance standards outlined in 49 CFR § 192.381. 

What is an EFV?

An EFV is a mechanical safety device installed on your natural gas service line. It is designed to automatically shut off the flow of natural gas if the service line is broken or damaged. EFVs do not stop the flow of gas for any leaks or faulty equipment on the customer’s side of the gas meter. 

Why should I consider installing an EFV?

If you or an excavator accidentally contacts the the natural gas service line while digging and severs the line, the EFV will automatically minimize or stop the flow of natural gas. By shutting off the gas flow, an EFV helps to:

• Prevent the buildup of natural gas, reducing the risk of an accident.
• Enhance the overall safety of your property and neighborhood. 

What is the cost of installing and maintaining an EFV?

• The cost for installation is typically $1,200, depending on the conditions of your property.
• While EFVs are highly durable, they may require maintenance or replacement over time. If maintenance or replacement is necessary, contact MGE for assistance.