Natural gas is naturally odourless. Before it reaches homes across Adelaide, suppliers add a harmless chemical called mercaptan that gives the gas its distinctive sulphur or rotten egg smell.
This added odour makes even small gas leaks easier to detect before they become dangerous.
The smell may vary in strength depending on the size of the leak, airflow through the home and where the leak is located. Sometimes the smell may only be noticeable near a particular appliance, while larger leaks can spread throughout multiple rooms or outdoor areas.
If you detect this distinctive smell, it is important to treat it as a genuine gas leak until proven otherwise.
What Should You Do Immediately?
If you smell gas at home, acting calmly and quickly is the safest approach.
Turn Off Gas Appliances
If it is safe to do so, switch off any gas appliances that are operating. This includes:
- Gas heaters
- Gas cooktops
- Gas ovens
- Gas hot water systems
- Outdoor gas appliances
Avoid attempting repairs or dismantling any appliance.
Open Windows and Doors
Increase ventilation by opening windows and external doors to allow fresh air to circulate throughout the home.
Improved airflow helps disperse accumulated gas and reduces the concentration indoors.
Avoid Flames and Sparks
Even a small spark can ignite escaping gas.
Escaping natural gas can ignite from even a small source of ignition. If you suspect a leak, resist the urge to switch lights on or off, unplug appliances or check the problem yourself with a lighter or match. These everyday actions can generate enough of a spark to ignite accumulated gas. The safest approach is to leave the property immediately if the smell is strong, then contact the appropriate emergency service from outside.
Leave the Property
If the smell is strong or widespread, everyone should leave the property immediately, including pets.
Move to a safe location away from the home before making any phone calls.
Contact the Appropriate Emergency Service
If you believe there is an active gas leak, contact your local gas network emergency number immediately from outside the property. Once the area has been made safe, arrange for a licensed gas fitter to inspect and repair the affected appliances or gas pipework.
Common Causes of Gas Smells Around the Home
Gas leaks are not always caused by damaged underground pipes. Many originate from everyday household appliances or ageing fittings.
Loose Appliance Connections
Many household gas leaks originate at the connection between an appliance and the gas supply rather than the appliance itself. Over time, vibration, movement during cleaning or general wear can affect fittings and flexible connections, allowing small leaks to develop that become noticeable through the distinctive gas odour.
Ageing Pipework
Older properties across Adelaide may have gas pipework that has been in service for decades. Although these systems are designed for longevity, corrosion, accidental damage or ground movement can eventually affect their integrity, making periodic inspections worthwhile.
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Faulty Gas Appliances
Internal appliance components can wear over time.
Gas heaters, ovens and hot water systems may develop leaking valves, burners or seals that require servicing or replacement.
Regular servicing helps identify these issues early. Our article on Gas Appliance Maintenance Adelaide provides additional guidance on keeping household gas appliances operating safely.
Damaged Outdoor Gas Lines
Outdoor gas pipes supplying barbecues, pool heaters or external appliances can be damaged by gardening equipment, landscaping work or corrosion.
Even minor impacts can create leaks that may not be immediately visible.
Warning Signs Beyond the Smell
Although the odour is usually the first sign, it is not the only indicator of a gas leak.
Watch for:
- Hissing sounds near gas pipes
- Dead or discoloured patches of grass above underground gas lines
- Bubbling water around buried gas services
- Pilot lights repeatedly going out
- Appliances struggling to ignite
- Unexpected increases in gas usage
- Visible damage to gas pipes or fittings
If you notice several of these warning signs together, stop using the affected appliance and arrange a professional inspection.
Should You Try to Find the Leak Yourself?
It can be tempting to inspect the suspected leak yourself, particularly if the smell seems minor.
However, locating gas leaks requires specialised testing equipment and experience.
Avoid using:
- Open flames
- DIY repair kits
- Homemade leak detection methods
- Temporary tape or sealants
Only licensed gas fitters are legally permitted to repair gas installations in South Australia.
Attempting DIY gas work can place your household at significant risk and may breach safety regulations.
For more information, read our article about Why DIY Gas Work Creates Serious Safety Risks.
Why Professional Gas Leak Detection Matters
Gas leaks are not always visible.
Professional gas fitters use specialised leak detection equipment capable of locating extremely small leaks within appliances, fittings and concealed pipework.
During an inspection, they may:
- Test gas pressure
- Check appliance operation
- Inspect gas regulators
- Examine exposed pipework
- Test appliance connections
- Verify ventilation requirements
These inspections help identify both current leaks and potential future problems before they become emergencies.
Preventing Gas Leaks in Adelaide Homes
While not every leak can be prevented, regular maintenance significantly reduces the risk.
Simple preventative measures include:
Schedule Routine Gas Appliance Servicing
Annual servicing keeps appliances operating safely while identifying worn components before they fail.
Replace Ageing Appliances
Older appliances often become less efficient and may eventually develop safety concerns.
If your gas heater or hot water system is approaching the end of its service life, discuss replacement options with a licensed professional.
Keep Outdoor Gas Lines Protected
Avoid striking exposed gas pipes during landscaping projects.
If excavation work is planned, identify underground services beforehand.
Watch for Changes in Appliance Performance
Difficulty lighting burners, unusual flames or inconsistent heating may indicate developing gas problems that should be investigated promptly.
Frequently Asked Questions
Is a faint gas smell always dangerous?
Any gas smell should be taken seriously. Even if the smell disappears quickly, it is worth arranging a professional inspection to identify the source.
Can I stay inside while waiting for a gas fitter?
If the smell is strong or widespread, leave the property immediately and contact the appropriate emergency gas service before arranging repairs.
Why do I only smell gas near one appliance?
This may indicate a leak within that appliance or its connection. Stop using it until it has been inspected by a licensed gas fitter.
How often should gas appliances be checked?
Most residential gas appliances should be professionally inspected at regular intervals, particularly before heavy seasonal use. Routine servicing helps maintain efficiency while identifying developing safety issues.
Can a gas leak cause carbon monoxide?
Not directly, but faulty gas appliances can produce carbon monoxide if combustion is incomplete. This is another reason regular servicing and inspections are important.
Conclusion
Smelling gas at home is never something to ignore. While the source may be a minor appliance fault, it can also indicate a potentially dangerous gas leak that requires immediate attention.
Knowing how to respond calmly, ventilating the area, avoiding ignition sources and contacting the appropriate emergency service can help protect your household. Once the immediate risk has been addressed, a licensed gas fitter can identify the cause of the leak and carry out any necessary repairs.
Routine inspections and regular servicing remain the best way to reduce the likelihood of unexpected gas leaks and keep your home’s gas appliances operating safely.
