What to Do With a Gas Leak: Act Fast to Stay Safe

Natural gas and Liquid Petroleum Gas (LPG) are staples in the Australian household. We use them for everything from searing a steak on the barbie to keeping the house warm during a chilly winter. While the gas network is generally very reliable, hardware does not last forever. Pipes can corrode, seals can perish, and accidents happen. When you suspect a leak, your priority is simple: protect life and property by acting without a second of delay.

Knowing what to do with a gas leak is about more than just common sense. It involves a specific set of steps designed to prevent a spark from turning a minor issue into a major emergency. This guide walks you through how to spot the signs and exactly how to handle the situation like a pro.

Spotting the Signs Early

You cannot see or taste natural gas, so suppliers add a chemical called mercaptan to the mix. This gives gas that famous “rotten egg” or sulphur smell. If you catch a whiff of this in your kitchen or laundry, do not ignore it. It is your first and most reliable warning sign.

However, a leak is not always about the smell. You might hear a distinct hissing or whistling sound coming from behind an oven or near a gas meter. This is the sound of gas escaping under pressure. Outside, keep an eye on your garden. If you see a patch of dead grass in an otherwise healthy lawn, or bubbles rising through a puddle after rain, you likely have an underground pipe leak.

Physical health is another indicator. Gas displaces oxygen, which can make you feel lightheaded. If you or your family members suddenly experience unexplained headaches, nausea, or dizziness that seems to improve when you step outside, treat it as a potential gas leak.

Immediate Steps to Stay Safe

If you suspect gas is leaking, you must stop the flow and clear the air. The risk of an explosion only exists when gas reaches a certain concentration in the air and finds a source of ignition. Your job is to keep that concentration low and remove the sparks.

• Ventilate the area: Open every door and window you can reach. This allows the gas to dissipate into the atmosphere rather than pooling in corners or cupboards.
• Shut off the supply: Go straight to your gas meter. You will find a lever on the pipe. Turn it so it sits at a right angle to the pipe. This shuts off the gas to the entire house.
• Kill the flames: Extinguish any cigarettes, candles, or incense immediately.
• Get out: Move everyone, including the dog and the cat, to a safe distance away from the building.

Once you are outside, stay there. Never go back inside to grab a wallet or a phone until a licensed professional says the coast is clear.

The Hidden Danger of Sparks

Many people do not realise how easy it is to create a spark. We do it dozens of times a day without thinking. When gas is in the air, these tiny actions become dangerous.

Do not touch any light switches. Turning a light off is just as risky as turning it on, as the internal mechanism can create a micro-spark. The same goes for unplugging a toaster or using a landline phone. Even static electricity from walking across a carpet can be enough to ignite a high concentration of gas.

If your car is in the garage or the driveway near the leak, leave it there. Starting an engine creates a massive electrical surge and a hot exhaust, both of which are ignition hazards. Use your mobile phone only once you are safely down the street, well away from the smell of gas.

Who Should You Call?

In Australia, the rules around gas are strict for a reason. You should never, ever try to fix a gas leak yourself. Not only is it illegal for an unlicensed person to work on gas lines, but it is incredibly dangerous.

If the leak is large, you hear a loud roar, or you feel the situation is life-threatening, call 000 immediately. The fire brigade has gas-sensing equipment and the training to secure a site. For smaller leaks or if you have successfully turned off the gas at the meter, call a licensed gas fitter.

Why Leaks Happen

Even the best-maintained homes can develop issues over time. Australia’s varied climate, from the humidity of the Top End to the dry heat of the outback, puts stress on materials.

• Ageing Pipes: Galvanised steel pipes in older homes eventually corrode, leading to pinhole leaks.
• Appliance Wear: The rubber hoses connecting your BBQ or gas heater can crack as they age.
• Ground Movement: If the soil shifts during a long drought or after heavy rain, it can put enough pressure on underground pipes to cause a snap.
• Poor Installation: Occasionally, DIY attempts or old, non-compliant work fail.

The Professional Fix

When a technician arrives, they don’t just guess where the leak is. They use a device called a combustible gas detector to find the exact spot. Once they identify the leak, they will likely perform a “static pressure test.” This involves using a manometer to see if the system can hold pressure. If the needle drops, there is still a hole somewhere.

Once the repair is done, they must issue you a Certificate of Compliance. This is a vital document in Australia. It proves the work meets the national safety standards (AS/NZS 5601) and ensures your home insurance remains valid. Without this certificate, you could find yourself in a difficult spot if something goes wrong later.

Carbon Monoxide: The Silent Risk

A gas leak is one thing, but “bad air” from a faulty heater is another. Carbon monoxide (CO) happens when gas doesn’t burn properly. Unlike raw gas, CO has no smell. It is a silent killer.

To stay safe, watch your appliance flames. A healthy gas flame should be a crisp, steady blue. If you see a lazy, yellow, or orange flame, your appliance is not burning correctly and could be pumping CO into your home. Ensure you have adequate ventilation, especially when using gas heaters in small rooms.

Keeping Your Home Gas-Safe

The best way to deal with a leak is to make sure it never starts. A bit of proactive maintenance goes a long way. Have a licensed gas fitter service your heaters and hot water units every two years. They will check the flues are clear of bird nests and ensure all the seals are tight.

Being prepared means you can stay calm if you ever smell that tell-tale rotten egg scent. Act fast, get outside, and leave the heavy lifting to the experts.

Gas Leak Safety: Frequently Asked Questions

Understanding the risks of gas in the home is the first step toward a safer household. This FAQ section addresses the most common concerns Australians have about detecting leaks, managing emergencies, and maintaining their gas appliances to prevent future issues.