Here’s a detailed guide on how to connect a BBQ grill to a gas line safely and properly. (Always follow local codes and regulations — gas work can be dangerous.)

Safety and Preliminary Considerations

Before you begin:

• Determine whether your grill and gas supply use natural gas (NG) or propane (LP). You usually can’t just hook up a propane grill to a natural gas line without a conversion kit.

• Confirm the house gas system has the capacity (BTU capacity) to supply the grill in addition to existing appliances.

• Check local building codes and permit requirements.

• Turn off the main gas supply before doing any work.

• Use pipe sealant or tape rated for gas connections (“yellow PTFE tape” for gas) when threading fittings.

• After installation, always test for leaks using soapy water or approved leak detection fluid. Look for bubbles.

Tools and Materials You’ll Need

• Pipe or tubing suitable for gas (flexible or rigid)

• Gas-rated fittings, adapters, quick-connect couplers

• Shut-off valve near the grill location

• Pipe sealant / gas-rated thread tape

• Pipe supports/hangers

• Wrenches, drills, pipe cutters

• Soapy water or gas leak detector

• Pressure gauge (for testing)

Step-by-Step Installation

Here’s a typical sequence to connect a grill to a gas line:

1. Turn off gas supply at the meter or main shut-off.

2. Tap into existing gas line via tee or branch (or use a stub-out) to feed your grill location.

3. Install a dedicated shut-off valve in the new branch, ideally both inside and outside. 

4. Run gas piping (rigid or flexible) from the valve to the grill location. Use proper supports and avoid sagging.

5. At the end of the line, install a quick-connect fitting (if desired) so you can easily detach the grill.

6. Connect the grill’s gas hose or supply line to that fitting (or direct to the stub). Use gas-rated hose and fittings. 

7. Pressure test the system (capped off) to ensure no leaks. Monitor for a period (e.g., 30–40 minutes) to confirm pressure holds. 

8. Use soapy water on all connections and fittings — turn on gas slowly and check for bubbles indicating leaks. Tighten as needed.

9. Once the line is verified leak-free, turn on the grill and test it under normal operating conditions.

Common Mistakes to Avoid

• Using the wrong type of line material (e.g. standard copper or non-gas-rated hose) when code prohibits it. 

• Undersizing the gas line, which results in insufficient gas pressure to the grill. 

• Skipping a shut-off valve near the grill.

• Using flare fittings instead of straight pipe nipples for natural gas grills (flare fittings can damage the hose ends). 

• Forgetting to account for conversion if using a propane grill on a natural gas supply.

• Neglecting leak tests after installation.