Most whole-house generators do need a fuel line, because they run on natural gas or propane. For a natural gas generator, that means a connection to your utility gas line, and for a propane generator, a line from a propane tank. The exact requirement depends on the fuel your generator uses. Understanding the fuel connection helps you plan a generator installation.

Here is what to know about gas lines for a whole-house generator.

Most standby generators use gas or propane

Whole-house standby generators are commonly fueled by natural gas or propane, both of which require a fuel line to deliver the fuel to the generator. This is different from a portable gasoline generator that you fill manually. A permanently installed standby generator is connected to a continuous or tank-based fuel supply through a proper fuel line.

Natural gas: a utility gas line

If your generator runs on natural gas and you have natural gas service, the generator is connected to your utility gas line. A gas line is run to the generator’s location, sized to deliver the fuel the generator needs. The advantage of natural gas is a continuous supply, so the generator does not run out of fuel under normal conditions. This is a popular choice for homes that already have natural gas service.

Propane: a tank and line

If your generator runs on propane, or if natural gas is not available at your home, the generator is fueled from a propane tank on your property, connected by a propane line. The tank provides fuel until it needs refilling. Propane is the common choice where natural gas service is not available.

Sizing and connecting the line

The fuel line must be properly sized to deliver enough fuel for the generator’s demand, especially for larger units. For natural gas, this may involve confirming that your gas service and meter can supply the additional demand, and in some cases the utility may need to be involved. The fuel line connection, whether gas or propane, is handled by a licensed gas fitter or plumber as part of the installation, with the appropriate permit.

What if you do not have gas or propane?

If you have neither natural gas service nor a desire for a propane tank, a standby generator that runs on those fuels may not fit without adding a fuel source. In that situation, options include installing a propane tank or considering alternative backup power. An installer can assess your fuel situation and recommend the best approach for your home.

Most whole-house generators need a fuel line, because they run on natural gas or propane. A natural gas generator connects to your utility gas line for a continuous supply, while a propane generator connects to a tank on your property. The fuel line must be properly sized and installed by a licensed professional with a permit. If you have neither fuel source, an installer can help you plan a fuel supply or alternative.

Stella Electric installs natural gas and propane whole-house generators for homeowners across the Baltimore area and throughout Maryland, with flat-rate pricing and no overtime charges. We coordinate the electrical and fuel connections for a complete installation. Financing is available on qualifying projects.