Gas Leak Signs at Home in Newcastle: What to Do Before the Plumber Arrives

A gas leak is one of the few true household emergencies — not because they're common, but because the potential consequences of ignoring or mishandling one are severe. In Newcastle, where natural gas services most of the metro area's homes and businesses, knowing how to recognise a gas leak and respond correctly could save lives.

Signs of a Gas Leak in Your Newcastle Home

Smell

Natural gas is odourless in its natural state. Gas companies add mercaptan, a sulphur compound, specifically so leaks can be detected by smell. The characteristic smell is rotten eggs or sulphur. If you smell this inside your home when no drain or sewer issue is present, take it seriously immediately — don't investigate, don't ignore it.

Note: sewer gas from a dry drain trap also smells like rotten eggs. If you smell sulphur near a floor waste or drain that hasn't been used recently, refilling the trap (by running water) may resolve it. If the smell persists away from drains or doesn't disappear after filling traps, treat it as a potential gas leak.

Sound

A hissing or whistling sound near a gas appliance, gas meter, or along a wall where a gas line runs indicates escaping gas under pressure. Even a faint hiss near a gas fitting should be investigated by a licensed gas fitter.

Visual Signs

• Dead or dying vegetation in a line across your yard (where an underground gas line may be leaking)
• Bubbles in wet ground or puddles near where gas lines run
• Visible damage to a gas line or fitting
• Your gas meter reading increasing when no appliances are on

Physical Symptoms

Exposure to even small concentrations of natural gas can cause: headaches, dizziness, nausea, fatigue, and disorientation. If multiple people in your household develop unexplained symptoms simultaneously, a gas leak is among the causes to investigate — particularly in poorly ventilated spaces.

Immediate Steps When You Suspect a Gas Leak

1. Do not turn any electrical switch on or off — light switches, power points, appliances. Electrical arcing can ignite accumulated gas.
2. Do not use your mobile phone inside the building. Step outside first, then call.
3. Extinguish all naked flames — candles, pilot lights if you can reach them safely without using electricity.
4. Leave doors and windows open as you exit — don't stop to open them if doing so requires time; exit first, ventilate after.
5. Turn off the gas at the meter — usually located outside near the front of the property. Turn the valve perpendicular to the pipe to close it.
6. Evacuate all people and pets.
7. Call for help from outside: call us on 0491 570 006 for a licensed gas fitter, and if you believe there is immediate danger or can still smell strong gas outside after turning off the meter, also call your gas supplier's emergency line (Jemena: 131 909 for NSW natural gas emergencies).
8. Do not re-enter until cleared by a gas fitter.

Common Causes of Residential Gas Leaks in Newcastle

• Deteriorated appliance connections: Flexible gas hoses connecting appliances to gas points age and develop cracks or loose fittings over time. Stoves, cooktops and heaters that haven't been serviced in years are at higher risk.
• Damaged gas meter connections: Physical damage to the meter or its connections — from vehicle impact, garden work, or building work nearby
• Underground pipe deterioration: Gas supply lines buried underground corrode over decades. Newcastle's older housing stock in areas like Hamilton and Cooks Hill may have original steel supply pipes approaching end of life.
• DIY or unlicensed connection work: Incorrectly connected appliances are a common source of leaks — another reason licensed gas fitters are mandatory.