Gas Line Safety

Meter Protection

To ensure the safe and efficient operation of natural gas equipment, please protect meters and vents:

  • Keep snow from burying exhaust and intake vents and from piling up on natural gas meters. A snow-free meter can function properly. Unobstructed vents can also help keep the pilot lights on, allow your appliances to breathe and operate efficiently and direct combustion byproducts to the outside.
  • Consider using a shelter specifically designed to protect the meter if you live in an area where snow and ice tend to build up on the meter. Do not shelter the meter with a metal sheet or wheelbarrow. When these or other metal objects, including trash cans, bicycles and/or gardening tools, come in contact with the meter, they can interfere with the system that protects the meter and associated piping from corrosion.
  • Please ensure any outside gas meters are not in direct contact with soil or mulch below them. Natural gas meters have aluminum housings that can corrode and cause damage (creating the potential for leaks). Also, take care not to bury the valve at the side of the meter. This valve must be exposed for emergency responders. 

Excess Flow Valve (EFV) 

An EFV is a safety device that is designed to shut off or significantly reduce the flow of natural gas if a service line becomes damaged, and that damage causes a sudden and significant leak or pressure drop. The damage is typically caused by excavation damage.

An EFV isn't required for normal, safe operation of the service line. However, a customer may request the installation of an excess flow valve (“EFV”) on an existing service line that qualifies for installation under federal pipeline safety regulations. Customers requesting installation of an EFV shall be responsible for the actual costs associated with installation, which shall be billable to the customer. Dominion Energy reserves the right not to install an EFV under conditions specified under federal pipeline safety regulations. Dominion Energy has been routinely installing these devices as part of the ongoing Pipeline Infrastructure Replacement Program  in Ohio and the Pipeline Replacement and Expansion Program in West Virginia.

A typical EFV

This is what a typical EFV looks like. The actual installed EFV may differ from this photo.


  • May prevent buildup of natural gas pressure and lessen the possibility of a natural gas emergency and/or resulting property damage.
  • Provides safe working conditions for Dominion Energy personnel at the scene of mainline damage.
  • Diminishes environmental impact by reducing the amount of natural gas escaping into the atmosphere.

If you have questions, or to request installation of an Excess Flow Valve, please Contact Us. During the call, we will determine whether the service line is eligible and, if appropriate, schedule an inspection and possible installation at a mutually agreeable date.

View the Federal Register notice detailing the ruling by the Pipeline and Hazardous Materials Safety Administration

Cross Bores

Cross Boring occurs when a utility unintentionally intersects or damages another utility's underground facilities.

For additional information, please refer to the Cross Bore Frequently Asked Questions (FAQ)