Choosing the best gas line for an outdoor fire pit starts with fit, not just flexibility. The line must match your fire pit’s fuel type, connection sizes, required gas flow, and installation layout. The options below range from compact connectors to larger-diameter lines, so check your appliance specifications and have a qualified gas professional confirm compatibility before buying or installing one.
Table of Contents
Quick Comparison
| Product | Size | Fuel compatibility | Notable feature | Availability |
|---|---|---|---|---|
| Dreffco High-Capacity Gas Flex Line | 18 in x 1/2 in | NG or LP | Flexible, non-whistle design | Listed as available |
| Alloxity 12-Inch Flex Gas Line Kit | 12 in, 3/8 in OD | NG or LP | Fittings and tape included; CSA certified | Listed as available |
| Dreffco 24-Inch Gas Flex Line | 24 in x 3/4 in | NG or LP | Larger-diameter flexible line | Listed as available |
| METER STAR Whistle-Free Gas Flex Line | 24 in; 1/2 in OD x 3/8 in ID | Propane | Stainless steel; fittings included | Listed as unavailable |
| Midwest Hearth 18-Inch Black Flex Line | 18 in; 3/8 in ID | Not specified in the supplied product details | Black finish; adapters included | Listed as unavailable |
Our Picks: Best Gas Line For Outdoor Fire Pit reviews
1. Dreffco High-Capacity Flex Line: Best for NG or LP Setups
This 18-inch Dreffco line is a flexible connector for compatible natural gas or propane fire pit systems. It uses corrugated stainless steel tubing with a black finish and is designed to bend around corners or through tight installation spaces. Its non-whistle design aims to reduce airflow noise that can occur with some gas connections.
The 1/2-inch size makes it important to check the fire pit’s specified connection and the rest of the gas system rather than assuming it fits because the fuel type matches. Dreffco also advises choosing the shortest suitable line for proper gas flow. Professional installation is recommended, which is a sensible approach for a fuel-gas connection.
Compared with the 12-inch Alloxity kit, this line gives you more length and a larger stated size. It has fewer listed accessory details, though, so verify whether you need additional fittings for your setup.
Pros:
- Listed for compatible NG or LP systems
- Flexible stainless steel construction with a black finish
- Non-whistle design
- 18-inch length can help with routing around obstacles
Cons:
- Fitting compatibility still needs to be confirmed
- Professional installation and service are recommended
Verdict: Choose this Dreffco line if your fire pit calls for a 1/2-inch connector and you need a flexible 18-inch option for an NG or LP setup.
2. Alloxity 12-Inch Flex Gas Line Kit: Best for a Short Connection
The Alloxity kit is a compact, 12-inch connector made for compatible natural gas or propane fire pits and fireplaces. Its product description specifies use with burners under 90,000 BTU and a 3/8-inch connection hub, so those limits are essential checks before you order. The line is listed as 3/8-inch outside diameter and made from 304 stainless steel with a black coating.
The kit includes a 1/2-inch male NPT fitting, a 1/2-inch female NPT fitting, a 90-degree adapter, and gas tape. This range of fittings may help with certain connection layouts, but it does not make the line universal: your appliance’s connection type and the gas professional’s requirements still determine whether the parts are appropriate. The product is described as CSA certified and intended for indoor or outdoor use.
Its short length may suit a close-coupled installation where extra hose would get in the way. It is less suitable when the layout needs more reach, and the stated burner limit makes it especially important to confirm your fire pit’s BTU requirement.
Pros:
- Kit includes several fittings and gas tape
- Short 12-inch length for a compact connection
- Described as CSA certified
- Black-coated stainless steel construction
Cons:
- Product details limit compatibility to burners under 90,000 BTU
- Specified for a 3/8-inch connection hub, so it may not fit other setups
Verdict: Consider the Alloxity kit when your fire pit meets its stated connection and BTU requirements and you want a short line with several fittings included.
3. Dreffco 24-Inch Flex Line: Best for a Larger Specified Size
This Dreffco connector is 24 inches long and 3/4 inch in size, with stainless steel construction and a black outer finish. It is listed for compatible NG or LP setups and several gas appliances, including fire pits. Its flexible body is designed to route around corners and turns, while its non-whistle profile is intended to soften connection noise.
The larger stated size sets it apart from the other choices here, but bigger is not automatically better. Your fire pit, supply system, and fittings must call for this size; choosing a line based on length alone could lead to a mismatch. The product description recommends installation and service by an NFI- or WETT-certified professional and advises shutting off the gas and having the system checked if unusually loud whistling continues.
At 24 inches, it offers more routing reach than the 12- and 18-inch options. That extra length can be useful in a compatible layout, but the line’s size and path should be checked by a qualified professional to make sure they suit the appliance and gas supply.
Pros:
- 24-inch length allows more routing reach
- Listed for compatible NG or LP systems
- Flexible stainless steel with a black finish
- Non-whistle design
Cons:
- 3/4-inch size may not match many fire pit connections
- Professional installation and service are recommended
Verdict: This is a reasonable option only when your fire pit setup specifically calls for a 3/4-inch line and the 24-inch length suits the planned route.
4. METER STAR 24-Inch Flex Line: Propane Option with Included Fittings
The METER STAR line is a 24-inch stainless steel connector described for propane fire pits and fireplaces. Its stated dimensions are 1/2 inch outside diameter and 3/8 inch inside diameter. The product description says it has a CSA approval and uses a multi-pattern corrugation intended to reduce whistling.
The listing includes 1/2-inch male NPT and 1/2-inch female NPT fittings. Check the actual connection requirements carefully: the line’s stated dimensions and the fittings’ thread sizes refer to different aspects of the connection and do not guarantee a match for your fire pit. This option is also listed as unavailable, so it may not be a practical choice unless its listing status changes.
Compared with the NG-or-LP Dreffco lines, this model is specifically described as a propane option. Its 24-inch reach may help with a longer route, but use it only if your appliance and gas setup are compatible with its specifications.
Pros:
- 24-inch length for a longer connection route
- Stainless steel construction
- Fittings are included
- Described as CSA approved and whistle-free
Cons:
- Listed as unavailable
- Product details specify propane rather than both NG and LP
Verdict: If it becomes available, consider this line only for a compatible propane setup that matches its dimensions and included fittings.
5. Midwest Hearth 18-Inch Flex Line: Black Finish for a Less Visible Connection
The Midwest Hearth connector is an 18-inch stainless steel line with a black finish. Its listed dimensions are 1/2 inch outside diameter and 3/8 inch inside diameter, with 1/2-inch flare nuts. The product description says the line is suitable for gas fire pits and other fire features and uses multi-pattern corrugation designed to disrupt vibrations that can cause whistling.
The package is described as including 1/2-inch male flare and 1/2-inch female NPT adapters. That combination may help with some installations, but it is not a substitute for checking your appliance’s exact connection type. The supplied details do not specify whether this line is intended for natural gas, propane, or both, so confirm fuel compatibility with the manufacturer or a qualified installer before considering it.
The black finish may be useful where you want the connection to be less noticeable around a fire feature. However, the listing is marked unavailable, and the missing fuel-type detail makes compatibility checks especially important.
Pros:
- 18-inch length with stainless steel construction
- Black finish can be less visible around a dark fire feature
- Adapters are included
- Non-whistle design
Cons:
- Listed as unavailable
- Supplied details do not specify NG or LP compatibility
Verdict: The Midwest Hearth line could suit a compatible installation where its black finish and dimensions are a match, but confirm fuel type and availability first.
How to Choose a Gas Line for an Outdoor Fire Pit
Confirm the Fuel Type
Start by checking whether your fire pit uses natural gas or propane. Some connectors are described for both fuel types, while others list only propane or do not specify a fuel type in the supplied details. Do not assume that a line is suitable for both. Confirm compatibility with your appliance instructions and a qualified gas professional.
Match the Line and Fitting Sizes
Compare the fire pit’s required connection sizes with the line’s stated dimensions and the fittings included in the package. Outside diameter, inside diameter, flare connections, and NPT threads describe different parts of a connector. A fitting that looks close is not necessarily the correct one, so check the appliance requirements rather than relying on a general size label.
Choose the Right Length and Route
Measure the route between the gas supply and the fire pit before choosing a 12-, 18-, or 24-inch line. A line that is too short may not reach without strain, while extra length may not be appropriate for every installation. One product description specifically recommends using the shortest suitable length for proper gas flow. Ask an installer to confirm the correct route and length for your setup.
Check Gas Demand and System Requirements
Make sure the connector is appropriate for your fire pit’s gas demand and the rest of the supply system. The Alloxity listing, for example, specifies burners under 90,000 BTU; that limit should not be treated as a universal rating for the other lines. Compare your appliance’s requirements with the connector’s published specifications and get professional guidance if anything is unclear.
Consider Construction and Noise Features
Several options here use stainless steel and describe a black finish, while some also advertise a non-whistle design. These details can matter for the appearance and sound of a compatible installation, but they do not establish that a line will fit your fire pit. Treat noise-reduction features as secondary to correct sizing, fuel compatibility, and proper installation.
Use Qualified Installation and Service
A gas connection is a safety-critical part of a fire pit system. The product descriptions recommend professional installation or service for some of these lines, and a qualified installer can check fitting compatibility and system requirements. If you notice unusual whistling or suspect a leak, stop using the fire pit, shut off the gas if it is safe to do so, and contact a qualified professional.
Frequently Asked Questions
Can I use the same gas line for natural gas and propane?
Only if the specific connector and fire pit are listed as compatible with both. The Dreffco lines and Alloxity kit are described for NG or LP use, while the METER STAR listing specifies propane. The Midwest Hearth details provided here do not state a fuel type. Always confirm compatibility for your exact setup.
How do I know what size gas line my fire pit needs?
Check the fire pit’s installation instructions for the required line size and fitting type. Then compare those requirements with the connector’s stated dimensions and included adapters. If the specifications use terms you are unsure about, have a qualified gas professional confirm the match.
Is a longer gas line always better?
No. Choose a length that suits the route and the requirements of the system. A longer line may provide more reach, but it is not automatically the right choice. One of the product descriptions advises choosing the shortest suitable length for proper gas flow; have an installer confirm what your setup needs.
What does “whistle-free” mean?
It describes a design intended to reduce whistling that can occur in some gas connections. It is not a guarantee that every installation will be silent. If unusually loud whistling continues, shut off the gas and have the system checked by a qualified professional.
Do these gas lines include all the fittings I need?
Not necessarily. The Alloxity, METER STAR, and Midwest Hearth descriptions list certain fittings, while the Dreffco descriptions do not provide the same level of accessory detail. Even an included adapter may not match your fire pit. Compare every connection with the appliance requirements before purchase.
Can I install an outdoor fire pit gas line myself?
The product descriptions recommend professional installation or service for some of these connectors. Because fit and gas-system requirements matter, use a qualified professional if you are unsure about the work or your local requirements. Follow the fire pit manufacturer’s instructions.
Final Recommendation
For a broadly useful starting point, the Dreffco 18-inch High-Capacity Flex Line stands out because it is listed for compatible NG or LP setups and has a flexible, non-whistle design. The Alloxity kit is a better fit for a short connection when your fire pit meets its stated 3/8-inch hub and under-90,000-BTU requirements. In every case, confirm fuel type, fittings, line size, and length with your appliance specifications and a qualified gas professional before choosing.
