Most homeowners know they should arrange a gas inspection when installing a new appliance or after gas work has been completed. Fewer know what actually happens during the inspection.
A licensed gas inspection involves far more than checking whether a stove lights or a heater turns on. It is a systematic assessment of your entire gas installation, including pipework, appliances, ventilation and safety devices, to ensure everything complies with NSW regulations and Australian Standards.
Some gas faults are obvious. Others remain hidden until proper testing is carried out. That’s why a professional inspection is essential for protecting your property and the people living in it.
Here’s what you can expect during a licensed gas inspection in NSW.
Who Can Carry Out a Licensed Gas Inspection?
Only a licensed gas fitter can legally inspect, test and certify gas installations in New South Wales.
General plumbers, handymen or appliance installers who are not licensed for gas work cannot issue compliance certificates.
Before booking an inspection, homeowners can verify a contractor’s licence through NSW Fair Trading to ensure they are qualified to carry out the work.
Without the appropriate licence, any inspection or certificate may be invalid and could affect insurance or future property transactions.
Step 1: Inspecting the Gas Pipework
The inspection begins with a thorough visual assessment of the gas pipework throughout the property.
This may include exposed pipes located:
- Along external walls
- Beneath the floor
- Inside roof spaces
- Within cupboards or service areas
The gas fitter checks for:
- Corrosion
- Physical damage
- Unsupported pipework
- Poor routing
- Deteriorating joints or fittings
- Correct pipe sizing for connected appliances
While visual inspections identify obvious issues, hidden leaks require pressure testing.
Step 2: Pressure Testing the Gas System
Pressure testing is one of the most important parts of a licensed gas inspection.
The gas fitter isolates the gas installation and uses specialised equipment to pressurise the pipework. The pressure is then monitored for a specified period in accordance with AS/NZS 5601.
Even a small pressure loss can indicate a gas leak somewhere within the system.
If a leak is detected, the gas fitter will locate the source, complete the necessary repairs and repeat the test until the installation passes.
A pressure test provides confidence that the entire gas system is sealed and operating safely.
Step 3: Checking Every Gas Appliance
Each connected gas appliance is inspected individually.
This may include:
- Cooktops
- Ovens
- Hot water systems
- Gas heaters
- Barbecue outlets
- Other permanently connected gas appliances
During operation, the gas fitter checks:
- Burner performance
- Flame colour and stability
- Ignition and shutdown
- Gas pressure
- Appliance connections
- Signs of gas leaks or unusual odours
A healthy gas flame should burn blue and stable.
Yellow flames, lifting flames or uneven burner operation often indicate combustion or pressure problems that require further investigation.
Step 4: Ventilation and Flue Inspection
Safe gas appliances rely on adequate airflow.
Without proper ventilation, incomplete combustion can produce dangerous carbon monoxide.
The inspection includes checking:
- Permanent ventilation openings
- Flue condition and integrity
- Flue terminal locations
- Obstructions caused by debris or renovations
- Compliance with ventilation requirements for each appliance
Ventilation problems can be difficult for homeowners to identify, making this one of the most important parts of the inspection.
Step 5: Gas Meter and Regulator Inspection
The gas meter and pressure regulator are also examined.
These components ensure the gas supply reaches each appliance at the correct operating pressure.
The gas fitter checks:
- Regulator outlet pressure
- Meter connections
- Signs of leakage
- Accessibility for servicing
- General condition
Problems with the regulator can affect every gas appliance connected to the property.
Step 6: Identifying and Rectifying Defects
If any problems are found, the gas fitter will explain the issue and determine the appropriate course of action.
Minor Defects
Minor issues that don’t present an immediate safety risk are documented and scheduled for repair.
Serious Defects
Where a fault creates a safety concern, the affected appliance or section of pipework may be isolated until repairs are completed.
Immediate Safety Risks
If the installation presents an immediate danger, the gas fitter is legally required to make the system safe. This may involve shutting off the gas supply and notifying the relevant gas network operator.
A compliance certificate cannot be issued until all required safety issues have been addressed.
Step 7: Compliance Certification
Once the installation passes inspection, the appropriate documentation is issued.
Depending on the type of installation, this may include:
- Certificate of Compliance
- Certificate of Inspection
These documents confirm the work complies with NSW legislation and applicable Australian Standards.
Homeowners should keep these certificates in a safe place as proof that the installation has been inspected and certified.
When Is a Licensed Gas Inspection Required?
A licensed gas inspection is commonly required after:
- Installing a new gas appliance
- Extending or altering gas pipework
- Completing gas repairs
- Reconnecting a previously disconnected gas service
- Certain rental property compliance requirements
If you’re unsure whether your property requires an inspection, a licensed gas fitter can provide advice based on your situation.
Why Gas Inspections Are So Important
Natural gas is safe when installed and maintained correctly.
However, damaged pipework, leaking fittings, blocked flues or poorly operating appliances can create serious safety risks if left undetected.
A professional inspection confirms that every part of the gas installation is operating safely, efficiently and in accordance with current standards.
Identifying small problems early is often far less expensive than dealing with emergency repairs or replacing damaged appliances later.
Final Thoughts
A licensed gas inspection is far more comprehensive than a simple visual check.
From pressure testing the pipework to inspecting appliances, ventilation and regulators, every stage is designed to ensure your gas installation is safe, compliant and performing as it should.
Whether you’ve recently installed a new appliance, completed renovations or simply want peace of mind, arranging a professional gas inspection is one of the most important steps you can take to protect your home and family.
About Tai Irwin Plumbing and Draining
At Tai Irwin Plumbing and Draining, we provide reliable plumbing and gas plumbing services across Sydney’s Northern Beaches and North Shore for residential, commercial, strata and real estate clients.
Our experienced team handles gas leaks, appliance installations, gas repairs, hot water systems, blocked drains, burst pipes and 24/7 emergency plumbing. If you need a licensed gas inspection, we’ll thoroughly assess your gas installation, identify any safety concerns and provide practical advice to help keep your property safe and compliant.