Converting a propane grill to natural gas lets you connect it to a home natural-gas supply instead of using refillable propane cylinders. The change is safe only when the grill manufacturer explicitly supports it and provides the correct conversion parts and instructions. Many grills are designed for one fuel only; changing jets or connecting a hose without approval can cause a fire, explosion, carbon-monoxide exposure, or equipment damage. Check the model and local rules before buying parts, and hire a licensed gas fitter if the conversion is not clearly documented.
What You’ll Need
- The grill’s model and serial number, and its manual or manufacturer’s conversion instructions.
- A manufacturer-approved natural-gas conversion kit made for that exact grill model. It may include burners orifices, a regulator or hose, fittings, and labels; contents vary.
- An approved natural-gas outlet with adequate capacity and pressure, installed by a qualified professional where required.
- Tools specified by the manufacturer, commonly the correct-size wrenches and screwdrivers. Do not substitute parts or improvise fittings.
- Leak-detection solution approved for gas connections, or a commercial gas leak detector. Never use a flame to check for leaks.
- Eye protection and gloves. Keep a suitable fire extinguisher accessible while working.
Step-by-Step
- Confirm that conversion is permitted. Find the rating plate, usually on the grill cabinet or near the burners, and record the model number. Check the manual and contact the manufacturer to confirm that this specific grill can be converted. Obtain the specified kit and written instructions. If the manufacturer says the grill is not convertible, do not modify it; use a natural-gas grill instead.
- Check the gas supply and local requirements. Natural gas requires a correctly sized line, an appropriate shutoff valve, compatible outdoor-rated hose and fittings, and the pressure specified for the grill. A qualified gas fitter should confirm line capacity, outlet location, and any permit or inspection requirements. Do not connect a grill to a household appliance line or alter a gas pipe yourself.
- Shut everything off and let the grill cool. Work outdoors in a well-ventilated area, away from flames, sparks, cigarettes, and other ignition sources. Close the propane cylinder valve, disconnect the cylinder, and remove it from the work area. Make sure all grill burner knobs are off. Never work on a hot grill or leave propane attached during conversion.
- Follow the kit’s procedure to change the fuel components. Remove grates, heat plates, and burner assemblies only as directed. The kit may require replacing the propane orifices with natural-gas orifices, changing the regulator and hose, or making other model-specific changes. Use only the exact parts and tool sizes specified. Keep parts clean, do not enlarge or drill an orifice, and do not adjust a regulator unless the instructions expressly direct it. If a part is seized, damaged, or unclear, stop and call the manufacturer or a gas professional.
- Reassemble and identify the grill. Refit burners and other components in their original positions, ensuring burner tubes sit correctly over the gas valves and that no ports are blocked. Reinstall heat plates and grates. Attach any natural-gas label supplied with the kit in the location stated by the instructions, and retain the original propane parts separately. Never leave the grill labeled or configured in a way that could mislead someone about its fuel.
- Connect the natural-gas hose with the supply off. Close the grill’s shutoff valve and the natural-gas outlet valve before attaching the approved hose. Use only compatible, outdoor-rated connections and the specified method for sealing threaded joints. Do not use tape or sealant on flare fittings or other connections where the manufacturer prohibits it. Route the hose away from hot surfaces, sharp edges, traffic, and pinch points; it must not pass through an enclosed space or be stretched tight.
- Check every connection for leaks. With the burners off, open the gas supply as directed by the manufacturer. Apply leak-detection solution to the hose ends, fittings, and disturbed joints. Growing bubbles indicate a leak. Close the shutoff valve immediately, do not light the grill or operate electrical switches nearby, and ventilate the area. Have a qualified professional repair the problem, then repeat the test. If you smell gas and cannot promptly shut it off safely, leave the area and call the gas utility or emergency services from a safe location.
- Test the grill only after the leak test passes. Follow the manufacturer’s lighting instructions outdoors, with the lid open if required. Light one burner at a time and check for steady, even flames and normal ignition. Stop if flames lift, flare, burn unusually yellow, go out, or produce soot, or if you hear gas escaping or smell gas. Turn off the burners and supply, let the grill cool, and arrange professional inspection. Do not cook until the grill operates normally.
Common Mistakes
- Assuming every propane grill can be converted. Similar-looking models may use different valves, orifices, and regulators.
- Using a generic kit, propane hose, or homemade adapter. A connection that fits is not necessarily safe or approved.
- Drilling or enlarging burner orifices. Orifice size controls fuel flow; an incorrect size can create dangerous flames or incomplete combustion.
- Skipping the leak test or checking for leaks with a match or lighter.
- Ignoring the gas line’s capacity, pressure, shutoff requirements, or local permit rules.
- Operating the grill with a damaged hose, misplaced burner, blocked burner ports, or an open lid when the lighting instructions say otherwise.
Tips
- Photograph the original assembly before taking anything apart, but treat the manufacturer’s instructions as authoritative.
- Keep the conversion documentation, kit part numbers, and removed propane components together for future service.
- Inspect the hose and connections before use and periodically during the season. Replace damaged, cracked, corroded, or expired components according to their labels and the manufacturer’s schedule.
- Keep the grill outdoors, with the clearances specified by its manual. Never use it in a garage, enclosed porch, or other enclosed space because of fire and carbon-monoxide risks.
- If the procedure requires changing gas piping, measuring or setting pressure, or troubleshooting a leak, use a licensed gas fitter rather than guessing.
Troubleshooting
No gas or weak flames: Turn the grill off. Check that the outlet shutoff is open and the hose is not kinked, crushed, or disconnected. Do not loosen a fitting while the supply is on. If the supply is available but the burner still performs poorly, the kit, orifice, regulator, or line pressure may be incorrect; ask the installer or manufacturer to check it.
Uneven flames, delayed ignition, soot, or a strong gas smell: Stop using the grill, turn off the burners and gas supply if safe, and let the area air out. Do not attempt repeated lighting. Have a professional verify the orifices, burner alignment, pressure, and connections. Yellow tips can occur briefly during startup, but persistent abnormal flames or soot need attention.
Bubbles appear during the leak test: Close the supply, keep flames and ignition sources away, and do not use the grill. Do not simply tighten a pressurized fitting or cover the leak with sealant. Have the connection repaired and retested. If the odor continues, move away and contact the utility or emergency services.
The kit does not match or a part will not fit: Stop. Do not modify the fitting, reuse an incompatible propane component, or force the part. Confirm the exact grill model and kit number with the manufacturer or return the incorrect kit.
Frequently Asked Questions
Can any propane grill be converted to natural gas?
No. Convert only models the manufacturer explicitly approves, using the exact kit and procedure for that model. Otherwise, replace the grill with a natural-gas model.
Can I do the conversion myself?
Some manufacturers provide procedures for owner installation, but gas work may be restricted by local law and a supply-line installation should be handled by a qualified professional. If instructions or parts are unclear, do not proceed.
Can I use the same regulator and hose?
Only if the manufacturer’s conversion instructions specifically say to. Natural gas and propane operate differently; the required regulator, hose, fittings, and burner orifices depend on the grill.
Will the grill heat as well on natural gas?
Performance depends on the grill’s approved configuration and the supply pressure and capacity. A correctly converted grill should operate as specified by its manufacturer; weak heat is not a reason to enlarge an orifice.
Can I switch back to propane later?
Only if the manufacturer allows it. The correct propane components must be restored, the fuel connection changed safely, and the grill checked for leaks and proper operation before use.
What should I do if I smell gas?
Do not light the grill or operate switches. Shut off the gas only if you can do so safely, leave the area, and call your gas utility or emergency services from a safe location.