A gas fault rarely gives you much warning. One moment your hot water is working, the next there is a sulphur-like smell near the meter, a yellow flame under the cooktop, or a heater that keeps cutting out. This gas safety compliance guide explains what Sydney property owners, landlords and managers need to keep on top of, and when the job must be handed straight to a licensed gasfitter.

Gas is efficient and reliable when an installation is correctly designed, tested and maintained. When it is not, the risks include fire, explosion, carbon monoxide exposure and costly damage to a property. Small warning signs should never be treated as something to monitor later.

What gas safety compliance means in NSW

Gas safety compliance is not simply having a gas appliance that turns on. It means the gas installation, pipework, appliances and ventilation arrangements are safe, suitable for their intended use and worked on by appropriately licensed tradespeople.

For most homes, this involves ensuring gas work is completed by a licensed gasfitter, appliances are installed to manufacturer requirements, connections are sound, and faults are repaired without delay. After eligible gasfitting work, your contractor should provide the required compliance documentation. Keep it with your property records, particularly if you are a landlord, strata manager or planning to sell.

There is no one-size-fits-all annual gas certificate for every NSW home. The right maintenance schedule depends on the appliance type, its age, how heavily it is used, manufacturer guidance, and whether the property is residential, tenanted or commercial. A commercial kitchen, for example, needs a more structured inspection program than a lightly used residential cooktop.

The key point is simple: do not use unlicensed labour for gas work, and do not assume an appliance is safe because it is still operating.

The gas safety compliance guide for property owners

A practical compliance approach starts with knowing what is installed at your property. This includes gas hot-water systems, cooktops, ovens, heaters, fireplaces, bayonet points, outdoor BBQ connections and gas meters. Older homes may also have concealed pipework that has been altered during renovations, landscaping or extensions.

Keep a basic record of appliance make, model, installation date, service history and any past repairs. This is particularly useful for investment properties and strata buildings, where several people may need to confirm what work has been done and when.

Your regular checks do not replace professional testing, but they can help you spot an issue early. Look out for:

• a gas smell inside or outside the building
• yellow, orange or uneven burner flames instead of a steady blue flame
• black marks, soot or heat damage around an appliance
• pilot lights that go out repeatedly, delayed ignition or unusual sounds
• headaches, dizziness, nausea or tiredness that improve when people leave the room

The last point matters. Faulty or poorly ventilated gas appliances can create carbon monoxide, which cannot be seen or smelled. If occupants feel unwell and a gas appliance may be involved, turn it off if safe to do so, move everyone to fresh air and arrange urgent professional advice.

Do not ignore ventilation

Gas appliances need enough fresh air to burn fuel properly. Never block fixed vents, close off required ventilation openings or use an unflued gas heater in a room that is not suitable for it. Renovations can accidentally create problems too. New cabinetry, enclosed alfresco areas and altered wall openings may change clearances and airflow around an existing appliance.

Before enclosing, relocating or replacing a gas appliance, have a licensed gasfitter assess the setup. What looks like a straightforward kitchen upgrade can require changes to gas pipe sizing, ventilation, isolation valves or appliance positioning.

Treat pipework as part of the system

Property owners often focus on the heater or cooktop and forget the pipework feeding it. Exposed gas lines can corrode, be damaged by gardening equipment or suffer from unsupported sections. Underground pipework can also be affected by excavation, soil movement or previous building work.

If you are planning a deck, retaining wall, pool work or major landscaping, identify gas services before digging. Never cut, cap, extend or move a gas line yourself. A licensed professional can isolate the service, test for leaks and ensure the altered installation is compliant before gas is restored.

Landlords, strata managers and commercial operators

Landlords have a duty to provide premises that are reasonably fit to live in and to arrange repairs within a reasonable time. If a tenant reports a gas smell, faulty heater, damaged cooktop or hot-water issue involving gas, treat it as urgent. Asking a tenant to keep using the appliance while waiting for a routine inspection is not a safe option.

For rental properties, clear reporting instructions help. Tenants should know how to turn off an appliance if safe, where the gas meter is located, and who to contact after hours. Maintain copies of gasfitting invoices, compliance certificates, appliance manuals and service reports. This creates a useful record and avoids disputes when a property changes hands or management.

Strata and commercial sites need more coordination because the gas network may serve common areas, plant rooms, multiple tenancies or commercial equipment. Responsibility can vary between an owners corporation, lot owner, tenant and managing agent. Documenting the boundary of responsibility before a fault occurs prevents delays when immediate action is needed.

Commercial businesses should also consider their work health and safety obligations. Restaurants, childcare centres, workshops and other workplaces using gas equipment need staff who know how to report faults, isolate appliances where appropriate and respond to a suspected leak. Scheduled servicing is usually cheaper and less disruptive than an unexpected shutdown during trading hours.

What to do if you smell gas

A gas smell is not a diagnosis to make from a distance. Take sensible precautions and get help.

Do not use flames, smoke, operate electrical switches or start vehicles near the suspected leak. If it is safe, turn off the appliance and isolate the gas supply at the meter. Open doors and windows, move people away from the area, then contact your gas network emergency line or emergency services if there is immediate danger. Once the area is safe, arrange a licensed gasfitter to inspect, locate and repair the fault.

Do not try to find a leak with a match, temporary tape or a DIY fitting. Gas leak detection and pressure testing require the right equipment and training. A proper repair should be tested before the system is put back into service.

When to book a gas safety inspection

Book a professional inspection when you move into an older property, buy a home with ageing gas appliances, renovate a kitchen or laundry, install a new heater or hot-water system, or notice any change in appliance performance. It is also sensible to arrange servicing in line with the appliance manufacturer’s recommendations, especially for heaters that will be heavily used through winter.

A licensed gasfitter can carry out fault finding, inspect visible pipework and connections, test for leaks, assess burner operation and check whether an appliance installation appears suitable. If repairs or replacement are needed, you should receive a clear explanation of the problem, the work required and the likely cost before work proceeds.

For homes and businesses across Western Sydney, South-West Sydney, the Hills District and North-West Sydney, a prompt inspection can prevent a manageable fault from becoming an evacuation, a shutdown or a serious safety incident.

Gas safety is one area where waiting rarely improves the outcome. If something smells wrong, sounds wrong or is not operating as it should, stop using it and book a licensed technician before the risk gets worse.