What To Do If There Is a Gas Leak

The smell of gas inside a home demands an immediate response, even when the source seems likely to be a stove burner, barbecue connection or appliance that has failed to ignite. Gas can spread beyond the room where it was first noticed and collect in spaces where a spark, flame or electrical switch could ignite it. The safest approach is to stop treating the situation as a household fault to investigate and start treating it as an emergency that must be made safe.

Natural gas and liquefied petroleum gas, usually known as LPG, are naturally odourless. A strong-smelling substance is added so that escaping gas can be detected quickly, producing the familiar odour commonly compared with rotten eggs. Even a faint or intermittent smell should not be dismissed simply because no damaged pipe or faulty appliance is immediately visible.

What happens in the first few minutes is more important than finding the source. People need to leave, possible ignition sources must be avoided and the appropriate emergency service, distributor or licensed gasfitter must be contacted from outside. Searching cupboards, relighting appliances or repeatedly walking through the property to see whether the smell has faded only increases the risk.

Leave Electrical Switches And Appliances Alone

The instinctive response to an unusual smell is often to turn on a light, activate an exhaust fan or use a phone to investigate. During a suspected gas leak, none of those actions is appropriate. Electrical equipment can produce a small spark when it is switched on or off, and that spark may be enough to ignite gas that has accumulated in the air.

Leave lights in their existing position. Do not switch them on and do not switch them off. The same applies to power points, rangehoods, fans, air conditioners, garage-door motors, doorbells and other powered equipment. A mobile phone should not be used until the person calling has moved outside and away from the suspected leak.

Flames present an obvious danger. Cigarettes, candles, matches, cigarette lighters, fireplaces and gas cooktops must not be used. Nobody should attempt to locate a leak by passing a flame along a pipe or connection. A gas leak may be difficult to see, but testing with an ignition source can turn an uncertain situation into a fire or explosion.

The household switchboard should also be left alone. Turning off the main electrical supply may appear sensible, but operating the switch can itself create a spark. Unless emergency services give different instructions, the priority is to leave rather than moving around the property trying to shut down electrical systems.

Move Everyone To A Safe Place

Ask everyone in the home to leave calmly and directly. Children, visitors and pets should be taken with them, and people should move far enough away that they are no longer standing beside the house, gas meter, cylinder installation or any place where gas can be heard or smelt.

Do not delay evacuation to collect possessions or complete a final inspection. A gas leak cannot be judged reliably by how strong the smell seems to one person. People become accustomed to odours, air movement can shift the smell through different rooms, and gas may be collecting in a concealed or poorly ventilated space.

In an apartment or townhouse complex, a leak may involve shared pipework, a meter bank, a communal barbecue area or another residence. Leave the affected area before contacting neighbours, the body corporate manager or building management. Do not use an internal intercom or lift if doing so requires operating electrical equipment in the area where gas is suspected. Follow instructions from emergency services about whether adjoining residences also need to be evacuated.

If gas is smelt outside near a meter, footpath, service line or street, keep away from the area and prevent others from approaching where this can be done safely. Do not search for the source, move covers or interfere with network equipment.

Turn Off The Gas Only When It Is Safe

Queensland safety guidance advises turning off the affected appliance and gas supply when this can be done safely. That qualification is important. Nobody should remain in a gas-filled room, enter an enclosed area or spend time searching for an unfamiliar valve simply to shut the supply down.

For a home connected to a natural gas network, the main shut-off valve is normally located at the gas meter. Its exact arrangement can vary, and householders should learn where it is before an emergency occurs rather than trying to understand it while gas is escaping. Australian Gas Networks describes a common quarter-turn valve that closes when rotated 90 degrees, but the instructions for the particular meter and distributor should always be followed.

Homes using large LPG cylinders generally have valves at the cylinders or regulator assembly. A barbecue or portable appliance has a valve on the cylinder itself. Close the valve only when the cylinder is readily accessible, there is no fire and approaching it does not require moving into a strong concentration of gas.

If a valve is damaged, difficult to reach, surrounded by gas or located close to fire, leave it alone. Emergency responders and gas technicians have the equipment and training to control situations that are unsafe for a resident to approach.

Ventilate The Area Without Using Powered Fans

Opening an external door or window can help gas disperse, but only when it can be done quickly and without delaying evacuation. Natural airflow is appropriate. An electric exhaust fan, ceiling fan, rangehood or air conditioner is not.

Someone already beside an openable door or window may be able to leave it open while departing. It is not worth walking deeper into the property or returning after evacuation to open additional rooms. Ventilation does not prove that the leak has stopped, and a reduction in smell does not make the gas installation safe to use.

Weather conditions and the type of gas affect where it travels. Natural gas is lighter than air and tends to rise, although it can still build up in roof spaces, high cupboards and other enclosed areas. LPG is heavier than air and can settle near floors, beneath buildings, in pits and around drains. This makes low areas particularly concerning during an LPG leak.

Doors and windows may reduce the concentration inside an ordinary room, but they cannot be relied upon to clear wall cavities, subfloor spaces, ceiling voids or drains. Professional assessment remains necessary before the supply or appliance is used again.

Know Who To Call

Call Triple Zero (000) immediately when there is a fire, explosion, uncontrolled gas release, immediate threat to people or property, or a gas smell that continues after the available supply valve has been closed. The call should be made from outside and away from the suspected leak.

A gas distributor should be contacted when natural gas is smelt around the street, service line, meter or property. The distributor’s emergency number appears on the gas bill, usually under a heading such as emergencies, faults or leaking gas. Australian Gas Networks customers can call its 24-hour gas leak line on 1800 GAS LEAK, which is 1800 427 532. Distribution areas vary across Queensland, so the number printed on the household’s current bill should remain the primary reference.

For bottled LPG, contact the cylinder supplier using the emergency details supplied with the account, delivery documentation or cylinder installation. A supplier may arrange an inspection or advise that a licensed gasfitter is required.

A licensed gasfitter deals with leaks involving household pipework, connections and appliances. Gas work is licensed work in Queensland. Residents should not dismantle an appliance, tighten internal fittings, replace valves or attempt to repair a pipe themselves.

The gas distributor and gasfitter have different responsibilities. A distributor generally manages the network, service line and meter, while the property owner is normally responsible for pipework and appliances beyond the meter outlet. The emergency operator can help determine which response is required.

Do Not Go Back Inside To Check

Once outside, remain outside until emergency services, the gas distributor or a qualified technician says the area is safe. Do not re-enter because the smell appears to have weakened, because an open door has been ventilating the room or because another person believes the leak came from a burner that was left on.

The source may have stopped temporarily, particularly where a valve, regulator or appliance is failing intermittently. Gas may also remain in enclosed parts of the building after the main rooms begin to clear.

Anyone who needs medication, mobility equipment or another essential item from inside should tell emergency responders rather than attempting to retrieve it. Pets that could not be collected safely should also be reported so that responders can decide how they should be reached.

When The Smell Comes From A Cooker

A cooking appliance is a common place to first notice gas, but familiarity with the kitchen should not make the response casual. A burner may have been turned without igniting, a flame may have been extinguished by a spill or draught, or a valve or connection may be leaking.

If the burner control is immediately within reach and can be turned off without operating another appliance or remaining in a strong gas smell, close it. Open a nearby door or window on the way out where this is safe, then leave the property. Do not keep clicking the igniter in an attempt to relight the burner, and do not test another burner to see whether the gas supply is working.

A small amount of gas released during an unsuccessful ignition may disperse once the control is closed and the room is ventilated. However, a continuing, recurring or unexplained smell requires professional attention. The cooker should remain unused until the cause is known.

An abnormal flame can also indicate that an appliance needs servicing. Flames that are unstable, repeatedly extinguish or do not burn as expected should be assessed by a licensed gasfitter rather than managed through repeated relighting or adjustment by the householder.

When The Leak Involves An LPG Cylinder

LPG requires particular caution because it can collect at ground level. A leaking barbecue cylinder, household cylinder bank or portable appliance should be kept away from drains, pits, enclosed patios, sheds and other low or poorly ventilated places.

If a portable cylinder is leaking, do not carry it through the house or place it in a vehicle. Moving a damaged or leaking cylinder can disturb the valve and spread gas into a more dangerous location. Keep people away and contact the supplier, fire service or licensed gasfitter for instructions.

A cylinder valve may be closed when it can be approached safely and there is no fire. Never attempt to remove or repair the cylinder valve. Queensland guidance requires cylinder valves to be repaired or replaced by an approved test station or qualified person.

Cylinders should normally be kept upright, secured and away from excessive heat or ignition sources. Visible corrosion, impact damage, a damaged hose or a persistent smell around a connection is reason to stop using the equipment and have it inspected.

A Gas Leak And Carbon Monoxide Are Different Hazards

The distinctive rotten-egg smell indicates escaping fuel gas. Carbon monoxide is different. It is produced when fuel does not burn properly and has no colour or smell, which means a household cannot rely on its senses to detect it.

A faulty or poorly ventilated gas appliance can produce carbon monoxide even when there is no obvious gas leak. Possible symptoms include headache, dizziness, nausea, weakness, tiredness, confusion, chest pain and shortness of breath. Several people becoming unwell in the same room, or symptoms easing after they move outside, should be treated seriously.

Move everyone into fresh air and call Triple Zero (000) when carbon monoxide exposure is suspected or anyone is seriously unwell. Do not return to operate or inspect the appliance. Medical assessment may be needed even when the person begins to feel better after leaving the building.

Portable outdoor heaters, barbecues, camping cookers, generators and outdoor water heaters must not be brought into enclosed rooms, tents, garages or other spaces for which they were not designed. An outdoor appliance can create a dangerous carbon monoxide concentration without producing the warning smell associated with leaking LPG.

What Happens After The Immediate Danger Has Passed

Stopping the gas supply is not the same as repairing the leak. Once the property has been made safe, the distributor or gasfitter will determine whether the problem lies with the network, meter, regulator, internal pipework or appliance.

A technician may isolate one appliance while leaving the remainder of the installation available, or the whole property may remain disconnected until repairs and testing are complete. This can affect cooking, hot water and heating, but the supply should not be restored simply for convenience.

Do not turn a meter or cylinder back on unless the distributor, supplier or licensed gasfitter has confirmed that it is appropriate. Relighting appliances may involve a specific sequence, and some equipment needs to be checked individually before use.

When an appliance has caused the leak, repair or replacement may be required. The safest decision depends on the appliance’s condition, age, availability of approved parts and whether the installation still complies with current requirements. A licensed gasfitter should provide the assessment rather than the household attempting to confirm the fault through further use.

What Renters Should Do

A renter does not need to wait for permission from an owner or property manager before responding to immediate danger. Leave the property, call Triple Zero when necessary and contact the gas distributor or cylinder supplier from a safe place.

Once the urgent response is underway, notify the property manager or owner and explain what has happened, who has attended and whether the supply has been isolated. Keep any job number, technician’s notice or written instruction provided by the distributor or emergency service.

Do not agree to restart an isolated appliance or supply merely because the smell has gone. Repairs to a fixed gas installation should be completed by an appropriately licensed person, and the property manager should be told promptly if the home cannot be used safely or has lost essential services.

Gas Leaks After Storms, Flooding Or Building Work

Gas systems can be damaged by events that do not initially appear connected to the supply. Floodwater may affect appliances, regulators and pipework. Falling branches, vehicles and construction work can damage meters or service lines. Soil movement and excavation can disturb underground pipes.

Any meter, cylinder, regulator or appliance that has been submerged, struck, displaced or visibly damaged should be left unused until it has been assessed. Drying the exterior does not establish that its internal components or combustion passages are safe.

A smell of gas after digging, fencing, landscaping or driveway work can indicate damage to an underground service. Stop work, turn off machinery without moving it closer to the leak if this can be done safely, move away and call Triple Zero or the gas distributor. Do not attempt to expose or clamp the damaged pipe.

Properties returning to use after flood or storm damage may need both the installation and individual appliances checked. Water or debris within an appliance can interfere with ignition and combustion even when no external damage is obvious.

Preventing The Next Gas Emergency

Preparation makes a real emergency easier to manage. Every household using gas should know whether the supply comes from a network meter or LPG cylinders, where the main shut-off point is located and which emergency number applies to the property. That information should be available without relying on an online search from inside the home.

Gas appliances should be installed, serviced and repaired by licensed gasfitters. Warning signs such as repeated ignition problems, unusual flames, damaged hoses, corrosion, unexplained smells or appliances that regularly shut down should be investigated rather than accepted as part of the equipment’s age.

Outdoor appliances should remain outdoors, and ventilation openings, flues and appliance clearances should not be blocked by renovations, stored belongings or new cabinetry. A room that has been altered since an appliance was installed may no longer provide the airflow on which the appliance depends.

LPG cylinders should be kept upright, secure and clear of heat and ignition sources. Portable cylinders need a valid test date and should be exchanged, refilled or repaired only through approved providers. Damaged, corroded or leaking cylinders should not be transported in the passenger compartment of a vehicle.

The most important preparation, however, is knowing when to stop investigating. A householder does not need to identify the exact failed fitting before asking for help. Smell the gas, avoid ignition sources, get outside and make the call. The technical work begins after everyone is safe.

Respond First And Investigate Later

A gas leak can begin with something easily overlooked: a faint smell near the stove, a hiss beside a cylinder or an odour that appears only when the hot-water system starts. The uncertainty can encourage people to stay inside and search for an explanation. That is the wrong order.

The immediate task is to remove people from danger and prevent a source of ignition. Valves can be closed and doors opened when they are directly accessible and safe to approach, but nobody should remain inside to complete a perfect shutdown. Calls should be made from outside, and the property should remain empty until the people responsible for making it safe have given clear instructions.

Most gas faults can be located and repaired once the supply is isolated. What cannot be undone is an ignition that occurs while someone is switching on a light, testing a burner or walking through the house with a phone. A cautious response may briefly disrupt the household. A delayed response can have far more serious consequences.

 

More Articles »

 

More Articles »

 

Disclaimer: Every effort has been made to ensure the accuracy of the information provided, but we make no guarantees regarding its completeness or reliability. The data is presented for general informational purposes only and does not constitute financial, investment, or legal advice. We are not liable for any errors, omissions, or consequences arising from its use. Users should verify details with relevant sources and seek professional advice where appropriate for the most accurate and up-to-date guidance.