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Natural Gas

There aren’t many home improvement decisions you can make that are as clear cut as the choice for natural gas. The benefits of natural gas are many, including:

  • Economical
    Affordable and the preferred choice among homeowners, natural gas can be a wise investment in your home.
  • Versatile
    Provides warm even heat, consistent hot water, and precise temperature control for stovetop cooking. 
  • Convenient and Reliable
    Available on demand – never run out of fuel and no need to arrange for deliveries. There's no waiting, no storage, no mess.
  • Clean
    Switching to natural gas from wood heat or oil can help reduce smog and greenhouse gas emissions.
  • Plentiful and Domestic
    Abundant energy resource produced in North America, which helps lessen our dependence on foreign oil.

For more information on the benefits of natural gas – or to obtain natural gas service – please call us at 877-GAS-TEAM (877-427-8326).

Washington Natural Gas Line Excess Allowance Program

Washington homeowners who convert to natural gas may now be eligible to take advantage of Avista’s Line Excess Allowance Program (LEAP).  This program provides residential customers with an “allowance” of $4,482 to help pay for the cost of connecting to our natural gas system.*

Additionally, if the cost to connect to our system is less than the allowance amount, the excess remaining may be applied toward the purchase and installation of a new high efficient (90% AFUE or greater) natural gas furnace or boiler, and/or a new natural gas water heater.

This program is available to Avista’s electric customers as well as homeowners who are not currently an Avista customer (Washington only, some restrictions may apply).

Interested?  For more information, please call 877-GAS-TEAM (877-427-8326).

*This program is not available for new construction

Excess Flow Valve (EFV)

What’s an EFV?

An excess flow valve (EFV) is a device that automatically closes and restricts the flow of natural gas if an underground pipe is broken, completely cut, or torn apart. Such damage may result from excavation or digging. However, an EVF does not shut off the flow of natural gas completely and the best way to protect against such incidents is to ensure that anyone excavating on your property has called 811 to have all underground utility lines properly marked before digging. Anyone performing excavation is responsible for immediately contacting Avista to report any damage to natural gas facilities.

It is important to note the following information about EFVs: First, installation of an EFV will not protect against customer appliance malfunction, customer houseline natural gas leaks, small natural gas service line punctures, or natural gas meter leaks. Second, EFVs are not suitable for all applications. Finally, an EFV may not protect against damage to natural gas service lines from earthquakes or flooding.

Where is an EFV installed?

The EFV is installed underground on the service pipeline that runs between the natural gas main (usually located in or near the street, alley, or easement) and the Avista meter on the customer’s property. Generally, the EFV is installed as close as possible to the natural gas main. In some instances the location may need to be installed further from the natural gas main to accommodate interference from other buried structures. EFVs may only be installed on Avista’s natural gas pipe by Avista employees or its approved contractors for safety reasons.

How do I request an EFV and how much does it cost to have an EFV installed?

EFV’s have been installed on most new and replaced natural gas customer services since 2008, however, beginning on April 14, 2017, existing natural gas customers without an EFV on their natural gas service may elect to have one installed at the customer’s request and expense. Installation costs vary greatly due to different conditions within our service territory. Customers will be billed for actual labor and materials costs associated with the installation. Estimates for cost and timeframe for construction will be provided as requested on a case-by-case basis. There is no ongoing maintenance cost for the customer.

Installation feasibility will be based on a site visit by an Avista Customer Project Coordinator. If the installation is feasible, then the EFV installation will be made within a mutually agreeable time.

If you would like to pursue having an EFV installed in your service line or if you would like to find out if you already have an EFV, please call us at (800) 227-9187 or email us at

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For more information about the important role Natural gas plays in our region, visit the Northwest Gas Association website.

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