Add Gas Service to Outdoor Appliances Safely

New gas line installation for grills, heaters, and generators in Marble Falls, Texas.

When you want to run a natural gas grill on your patio in Marble Falls or add a tankless heater to your outdoor kitchen, the work begins with routing a new gas line from your meter or existing supply to the appliance location. This is not a simple extension of existing plumbing, and it requires proper sizing to ensure the line delivers adequate pressure under full demand without starving other appliances. Marble Falls Plumbing LLC handles the planning, permitting, and installation to ensure the system meets local code and operates reliably in all weather conditions.


Gas line installation involves calculating the BTU demand of your appliances, selecting the correct pipe diameter, and routing the line in a way that avoids structural interference and minimizes exposure to physical damage. The line is then pressure tested before any gas is introduced, and all connections are checked for leaks using approved detection methods. This work supports grills, patio heaters, pool heaters, and standby generators, and is built to last without requiring frequent maintenance.


If you are planning an outdoor upgrade in Marble Falls and need a new gas line installed, contact Marble Falls Plumbing LLC to discuss your project and schedule an estimate.

Gas pipes with yellow insulation and shut-off valves in a wall opening.
Hands assembling plumbing components with tools on a wooden surface.

What Happens During a New Line Installation

The installation starts with a site evaluation to determine the best route from your gas meter to the appliance, accounting for obstacles such as footings, landscaping, and underground utilities. In Marble Falls, lines are often routed along exterior walls or buried in trenches depending on the appliance location and code requirements. The correct pipe size is chosen based on the total BTU load and the length of the run.


Once the line is installed, you will notice that your grill ignites immediately, your heater maintains consistent output, and your generator starts without hesitation during a power outage. Secure connections and pressure testing ensure the system operates safely under typical residential demand conditions.


All fittings are tightened to specification, and exposed sections are supported to prevent sagging or stress on joints. The work does not include appliance connection or startup unless specified, and it is your responsibility to ensure the appliance is rated for the gas type being supplied.

Person using pliers and a wrench to tighten a gas line fitting.

What to Know Before Adding a New Gas Line

Homeowners often ask about sizing, burial depth, permit requirements, and whether existing lines can support additional appliances without upgrading the main supply.


  • How do you determine the correct pipe size for my appliances? You add up the BTU rating of all appliances that may run simultaneously, then use a sizing chart that accounts for pipe length and pressure drop. Undersized lines cause weak flames and poor appliance performance.
  • What materials are used for outdoor gas line installation? Black iron pipe and CSST flexible gas line are both used in Marble Falls depending on the route and code requirements. CSST is easier to snake through walls, while black iron is often preferred for exposed runs.
  • How deep does a buried gas line need to be? Most jurisdictions require a minimum of 18 inches for residential lines, though depth may vary based on local code and whether the line runs under pavement or landscaping.
  • Can I add a new appliance to an existing gas line? Only if the existing line is sized to handle the additional load without exceeding capacity. Adding too many appliances to an undersized line causes pressure drop and poor performance across the system.
  • How long does it take to install a new gas line? A straightforward installation for a single appliance typically takes three to five hours, including trenching, pipe installation, and pressure testing. More complex runs with multiple appliances or longer distances take longer.


If you are ready to add gas service to your outdoor space or need a new line for a standby generator, Marble Falls Plumbing LLC can handle the installation from start to finish in Marble Falls. Reach out to discuss your project and get started.