Gas leak detection in Newcastle: leave first, diagnose second.
A practical safety sequence, the tests a licensed gasfitter should perform, realistic repair costs and the documents you receive when the installation is safe.
Do not search for the source inside the building.
A strong or persistent gas smell, visible damage to a gas pipe, or hissing near an appliance is urgent. Move everyone outside. Do not operate a light, fan, power point, garage door or mobile phone while still inside. Extinguish flames only if that can be done immediately without approaching the suspected leak. From a safe location, call Triple Zero if the smell is strong, anyone is unwell, or there is immediate danger.
If the gas meter or LPG cylinder is outdoors and you can reach it without walking through the affected area, close the supply valve. Do not re-enter to find it. Ventilation may help only when doors and windows can be opened safely on the way out. Contact the gas network operator when the suspected leak is at the meter or supply side, and a licensed gasfitter for the installation after the supply point.
Do not turn the gas back on to see whether the smell returns. An installation that has leaked must be tested before use. Our after-hours guide explains what information to have ready for an urgent trade call without delaying evacuation.
Gas odour and carbon monoxide are different
Network gas and LPG are odorised so a fuel leak can be noticed. Carbon monoxide is produced by incomplete combustion and has no reliable warning smell. Headache, nausea, dizziness, unusual tiredness or confusion around an operating heater means everyone should move to fresh air and seek emergency medical help. Sooting, a yellow unstable flame where the manufacturer specifies blue, condensation and an acrid combustion smell are appliance warning signs, not a reason for DIY adjustment.
Close down a suspect heater and keep it off. A gas-tight pipe can still feed an unsafe appliance, so leak testing alone is not a combustion safety service. Flue, ventilation, burner condition and combustion performance must be checked as part of the relevant appliance service.
A pressure drop locates the problem by elimination.
The gasfitter first confirms the supply type, makes the area safe and visually checks the meter, regulator, cylinders, exposed pipework, isolation valves, connectors, flues and appliances. The installation is isolated and tested at the specified pressure for the specified period. If it does not hold, the system is divided into sections so pipework and individual appliances can be tested separately.
Electronic combustible-gas detectors and approved leak-detection solution help pinpoint an accessible source. Concealed leaks may need staged isolation, access openings or replacement of a suspect run. A detector sweep on its own is not a substitute for a complete tightness test, because air movement and inaccessible cavities can hide the highest concentration.
After repair, the installation is tested again and connected appliances are inspected as required. Gasfitting must comply with AS/NZS 5601 and NSW gas safety law. The responsible contractor issues the appropriate Certificate of Compliance for network gas or Certificate of Inspection for bottled gas. Current NSW requirements set a 5 business day period for the network-gas certificate. Keep it with the property records.
Where Newcastle leaks commonly occur
Older homes in Hamilton, Mayfield and Merewether can retain threaded steel gas pipe, disconnected fireplace branches or additions completed in different eras. Coastal air can accelerate corrosion on poorly protected external components. Renovations create another pattern: a cabinet screw or wall fixing damages a concealed run, or an old bayonet is left live behind new joinery. LPG properties add regulators, cylinder pigtails and outdoor connections that weather over time.
None of those patterns proves the source. The correct diagnosis still comes from isolation and testing, not the age of the house or the strongest-smelling room.
Separate attendance, testing, access and repair.
Normal-hours attendance and tightness testing commonly costs $250 to $500. Urgent after-hours attendance is often $400 to $800 before parts. Repairing an accessible joint, valve or connector may bring the total to $450 to $900. An appliance control, regulator or complex valve can take a repair to $700 to $1,800, subject to model and parts availability.
Replacing a concealed or corroded gas run commonly starts around $1,500 and can exceed $6,000 where access, wall repair, trenching or appliance upgrades are involved. The written quote should distinguish gasfitting from carpentry, plastering and painting. It should also state whether GST, testing, recommissioning and the compliance certificate are included. Compare these components with the general pricing guide.
A suspiciously cheap quote often covers a detector sweep but not sectional testing or certification. Ask for the licence class, testing scope, repair rate if the first hour is exceeded, access assumptions and certificate. If an old appliance is the source, compare a major repair with safe replacement and future fuel plans. The gas versus heat pump guide is useful when the failed appliance is the home’s last major gas load.
Prevention and timing
Follow the appliance manufacturer’s service interval, commonly around 2 years for many residential gas heaters, and arrange service sooner for a changed flame, soot, unreliable ignition or ventilation changes. Check exposed LPG hoses and cylinder dates, but do not dismantle fixed fittings. Fire and Rescue NSW says cylinders require retesting every 10 years and warns never to use a naked flame for leak detection.
Planned servicing is sensible before the first sustained winter use, typically in autumn. Urgent symptoms have no season. Use the licensed gas fitting service for testing, repair and compliance rather than waiting for the next appliance cycle.
Gas leak questions, answered safely.
Keep the supply off until the installation is tested.
Licensed tightness testing, sectional diagnosis, repair and AS/NZS 5601 compliance across Newcastle and Lake Macquarie. For immediate danger, leave the property and contact emergency services first.