Excess Flow Valves (EFV)

Excess Flow Valves

Hawaii Gas (HG) customers can purchase an excess flow valve (EFV) for their home or business. If you are interested in obtaining more information on EFVs, please contact your local HG branch. Certain eligibility limitations may apply.

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What is an EFV?

An EFV is a device that’s designed to automatically restrict the flow of gas if your service line fails or an overpressure surge occurs. 

Where is an EFV installed?

An EFV is installed on the service pipeline that runs underground between the gas main in the street and the meter on your property.

Benefits of an EFV

An EFV can restrict gas flow when an excavator accidentally hits a service line. Likewise, if a meter is damaged during a car crash or similar incident, an EFV can restrict the flow of gas. This helps to reduce the chance of a gas related damage or injury.

How does the Installation Process Work?

If you are interested in having an EFV installed on your service pipeline for your home or business, contact your local HG branch to get started. Please note customers requesting this upgrade will be responsible for all costs associated with the installation and maintenance. Installation typically involves digging up the service pipeline, installation of the EFV, and any paving or concrete work as required. Restoration of any paving or concrete work will be scheduled at a later date. Please note it is possible gas service may be interrupted during installation of the EFV. Hawaii Gas will coordinate with you to schedule the installation and any follow up work.

What is the Cost to Install an EFV?

The cost to install an EFV at your home or business may range from $2,500 to $7,500, or more, based on specific site conditions. An estimate can be provided to you.

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Call 811 before you dig

Although an EFV may limit the damage caused by pipeline failure, the best way to prevent one is to make sure those who are digging on your property call 811.

Hawaii Gas Contact Numbers