If you’ve ever plugged a portable gas heater into a small chrome socket set into a wall or floor, that’s a gas bayonet point, and it’s one of the most Australian-specific pieces of gas terminology homeowners run into without ever quite knowing its name. Bayonet points turn up everywhere from lounge rooms to outdoor entertaining areas, and they’re a genuinely useful part of a gas system, but like all gas work, adding, moving, or connecting one needs to go through a licensed Gasfitter Gold Coast homeowners can trust to get it right the first time.
This guide covers what a gas bayonet actually is, how it works, what installation costs, and the safety and placement rules that apply to it.
What Is a Gas Bayonet?
A gas bayonet is a quick-connect gas outlet, usually a small chrome or metal socket set into a wall or floor, that lets a gas appliance be plugged straight into the home’s gas supply without any tools or fixed pipework connection. It’s the standard way portable gas heaters connect to a home’s gas system in Australia, and it’s increasingly used for outdoor BBQs and gas log fires as well.
How Does a Gas Bayonet Work?
A bayonet fitting has a built-in shut-off valve that stays closed when nothing is plugged in, sealing the point completely. When an appliance’s hose is pushed into the socket and given a quarter twist to lock, the valve opens and gas flows only while the connector is securely locked in place. Pull the hose out, and the valve closes automatically. This push-and-twist design is precisely why bayonets are the accepted method for portable gas appliances, there’s no open valve left exposed and no risk of gas flowing when nothing is connected.
How Much Does Installation Cost?
Pricing for a new bayonet point generally sits between $150 and $550, with the pipe run being the single biggest factor:
- A point tapped off a nearby existing gas line, on the same side of a wall, sits at the lower end, roughly $150 to $250
- A run across the house, under the floor or through a roof space, pushes toward the upper end, roughly $400 to $550
- Outdoor BBQ points specifically tend to run $200 to $600, since they often need a longer run to reach an alfresco or outdoor kitchen area
- Difficult access, slab floors, or an undersized existing gas line needing an upgrade can add further cost on top
This figure typically includes the fitting itself, pressure testing the completed connection, and the compliance certificate that must be issued for the work.
Who Can Install One?
Only a licensed gas fitter. In several states, including New South Wales, gas bayonet installation is explicitly classified as restricted gas fitting work under consumer safety legislation, meaning it must be carried out, modified, or relocated only by someone holding a current gasfitting licence. Every state applies the same underlying principle even where the specific legislative wording differs.
Can I Install One Myself?
No. This is regulated gas work in every state, and it involves connecting into a live gas supply, exactly the same as any other gas fitting task. DIY bayonet installation is illegal, voids most home insurance policies, and skips the pressure testing that confirms the fitting is sealed and safe before an appliance is ever plugged into it. Unlicensed gas work can also attract significant financial penalties, on top of the genuine fire, leak, and carbon monoxide risks involved.
Can Bayonets Be Installed Outside?
Yes, and this is one of the most common uses for a bayonet point. Outdoor bayonets are widely used for BBQs, alfresco cooking areas, patio and pergola heaters, and gas log fires, and they’re rated appropriately for weather exposure when installed correctly. A licensed fitter will assess ventilation, weather protection, and appliance clearance requirements specific to the outdoor location before installing the point.
Can I Use One for a BBQ?
Yes. A wall or floor-mounted outdoor bayonet is a common way to connect a natural gas BBQ directly to the home’s gas supply, replacing the need to manage and refill LPG cylinders entirely. This is a popular addition during outdoor kitchen renovations or alfresco upgrades, and it needs to be sized correctly for the BBQ’s gas demand as part of the installation.
Can I Use One for a Portable Gas Heater?
Yes, this is the most common residential use of a gas bayonet. Portable gas heaters are designed specifically to connect via a bayonet fitting rather than a fixed gas line, since the quick-connect design lets the heater be moved between rooms or seasons without any pipework being disturbed.
Are Gas Bayonets Safe?
Yes, when installed and used correctly. The built-in shut-off valve is specifically designed to prevent gas flow when nothing is connected, and a properly installed, pressure-tested bayonet carries no more risk than any other correctly fitted gas outlet. The risk comes almost entirely from incorrect installation, an unlicensed or poorly fitted bayonet can leak at the connection point, creating genuine fire or asphyxiation risk, which is exactly why pressure testing and a compliance certificate are non-negotiable parts of the job.
Can LPG Appliances Connect to Natural-Gas Bayonets?
Not directly. Bayonet fittings are rated to the specific gas type and pressure of the system they’re installed on, LPG and natural gas run at different pressures and require different injector sizing within the connected appliance. An LPG appliance generally can’t be safely connected to a natural gas bayonet, or vice versa, without the appliance being converted first. A licensed gas fitter can confirm what gas type your existing bayonet is rated for and whether your appliance is compatible or needs conversion.
Where Can a Bayonet Be Installed?
Bayonet points suit a wide range of indoor and outdoor locations, depending on how the property uses gas:
- Living rooms and bedrooms, for flued or unflued portable heaters
- Outdoor entertaining areas and alfresco kitchens, for BBQs
- Near a gas log fire or decorative fireplace unit, connecting at the base
- Under a pergola or patio, for overhead or standing outdoor heaters
- Behind a freestanding gas cooktop, giving a flexible connection point during a kitchen renovation
Before choosing a location, a licensed fitter will check the gas type, required appliance load, existing line sizing, ventilation, and clearance requirements, since the wrong location or an undersized line can cause real performance and safety issues down the track.
Can You Move an Existing Bayonet?
Yes, but relocating a bayonet point is treated as regulated gas work in exactly the same way as installing a new one, and it must be carried out by a licensed gas fitter. This comes up fairly often during renovations, moving a heater point to a different wall, or repositioning an outdoor bayonet as part of an alfresco redesign, and it generally involves capping the old point and running new pipework to the new location, followed by pressure testing and a fresh compliance certificate.
What Happens If a Bayonet Leaks?
Treat it the same as any other suspected gas leak. If you smell gas near a bayonet point, don’t attempt to inspect or tighten it yourself, leave the area, avoid switches or naked flames, and contact your gas network’s emergency line if the leak can’t be immediately isolated. Once the immediate situation is safe, a licensed gas fitter will locate the exact fault, whether that’s a worn valve, a damaged connector, or a poorly sealed original installation, repair it, and re-issue a compliance certificate confirming the fitting is safe again.
Book a Licensed Gasfitter Gold Coast Wide for Your Bayonet Point
Whether you’re adding a heater point before winter, connecting a BBQ to your outdoor kitchen, or relocating an existing bayonet as part of a renovation, Plumb Professor installs and certifies gas bayonet points across the Gold Coast with upfront pricing, a $0 call-out fee, and pressure testing on every job.
Call 07 5551 5954 or get in touch online to book your gas bayonet installation on the Gold Coast.
