Guide to Gas Compliance Checks for Property Owners

A gas appliance can appear to be working normally while a connection, flue or burner is developing a serious fault. That is why this guide to gas compliance checks focuses on the practical decisions property owners and managers need to make: knowing what requires professional attention, keeping the right records, and acting quickly when something is not right.

For homes, commercial premises, worksites and rural properties, gas safety is not a job for guesswork. Requirements differ between Australian states and territories, and the type of gas system matters too. Natural gas, LPG cylinders, commercial kitchens, plant rooms and outdoor heating all have different risks and installation requirements.

What a gas compliance check is designed to confirm

A gas compliance check assesses whether gas installation work and connected appliances are safe, correctly installed and compliant with the applicable rules. A licensed gasfitter carries out the work, using testing equipment and an understanding of the relevant local regulations and gas installation standards, including AS/NZS 5601 where applicable.

The check may be required after new gas work, an alteration, an appliance replacement or the discovery of a defect. It can also form part of planned maintenance for a commercial building, rental portfolio, hospitality venue or rural facility.

It is not simply a quick look at the cooktop flame. A proper inspection considers the full gas path, from the supply or LPG bottle connection through pipework and isolation valves to the appliance, burner, ventilation and flue arrangement.

Where certification is required, the gasfitter should provide the relevant compliance documentation for your state or territory. The document name and process vary by jurisdiction, so do not assume that paperwork issued for a job in one state meets the requirements in another.

When should you arrange a gas check?

Some situations call for an immediate response, while others are best handled as scheduled maintenance. If you smell gas, hear hissing near pipework or an appliance, see a damaged gas line, or suspect carbon monoxide exposure, turn off the gas supply if it is safe to do so, avoid flames and electrical switches, move people away from the area, and contact the gas emergency service and a licensed gasfitter.

For less urgent situations, book an inspection after any significant change to the system. This includes installing a new hot water unit, moving a cooktop during a kitchen renovation, converting an appliance between natural gas and LPG, extending gas pipework, or replacing commercial equipment.

Property managers should also consider routine checks when a tenancy changes, particularly where the property has older appliances, unflued gas heaters or LPG bottles. A general inspection does not replace specific rental obligations, but it can identify faults before they become an after-hours emergency.

For commercial and industrial sites, inspection frequency depends on the equipment, risk profile, manufacturer instructions and workplace procedures. A busy commercial kitchen, for example, has different maintenance needs from a small office kitchenette. Facilities with boilers, multiple hot water units or high-demand equipment should have a documented maintenance plan rather than relying on reactive repairs.

What a licensed gasfitter will inspect

The exact scope depends on the property and the reason for the visit. A compliance check following a new installation is different from a fault investigation on an existing appliance. However, a qualified gasfitter will commonly assess the following areas:

• Gas pipework, fittings, joints and flexible connections for condition, correct installation and signs of leakage.
• Isolation valves and controls to confirm they are accessible, operational and correctly located.
• Appliance connections, gas pressure and burner operation, including flame quality where relevant.
• Ventilation and clearances around appliances, especially for indoor gas heaters and commercial equipment.
• Flues, terminals and exhaust arrangements to ensure combustion products can discharge safely.
• LPG cylinder placement, regulators, hoses and changeover systems where bottled gas is used.

Testing may include a gas-tightness test, pressure testing, burner checks and carbon monoxide testing. If an appliance cannot be safely tested or presents an immediate hazard, the gasfitter may isolate it from the supply until repairs are completed. That can be inconvenient, particularly when it is your hot water system or kitchen equipment, but it is the right call when safety is uncertain.

Common issues found during gas compliance checks

Age alone does not make an installation unsafe, but older systems are more likely to have been altered, damaged or left without clear service records. DIY work and unlicensed modifications are another concern. Even a small change to pipework or a connection can affect appliance operation and compliance.

Leaking joints, worn flexible hoses, corroded pipework and damaged LPG regulators are regular findings. So are appliances that have not been serviced according to the manufacturer’s recommendations. Yellow or lazy flames, soot around an appliance, pilot lights that repeatedly go out and unusual operating noises should all be investigated.

Flue and ventilation issues deserve particular care. Gas appliances produce combustion gases, and those gases must be managed safely. Blocked flues, incorrect terminal locations, inadequate ventilation or a poorly located appliance can create a carbon monoxide risk. Carbon monoxide cannot be seen or smelled, which is why an appliance that seems to heat water or cook food normally should not be treated as automatically safe.

Commercial properties can also develop compliance issues when equipment is replaced without reviewing the existing gas supply. A larger appliance may require different pipe sizing, ventilation or shut-off arrangements. Planning this work with a licensed gasfitter before equipment arrives helps avoid delays, rework and interruptions to trade.

Documents and records worth keeping

Keep certificates, invoices, appliance manuals, service reports and test results together with your other property records. For a business, store them where site managers, maintenance contractors and safety teams can access them easily.

Good records help establish what work was completed, who carried it out and when an appliance was last serviced. They are also useful when selling a property, managing an insurance matter, arranging future repairs or responding to a tenant query.

If a defect is identified, ask for clear written advice on what was found, whether the appliance or installation has been isolated, what repair is recommended and whether further testing or certification will be needed. This removes uncertainty for owners and helps facilities managers prioritise urgent works.

Choosing the right person for the job

Gas work must be completed by an appropriately licensed gasfitter in the state or territory where the property is located. Before booking, confirm that the contractor is licensed for the work required and insured. For complex sites, ask whether they have experience with your specific system, such as LPG reticulation, commercial cooking equipment, hydronic heating or large-capacity hot water systems.

The cheapest quote is not always the most useful comparison. Check what is included: fault finding, pressure testing, parts, certification, appliance commissioning and follow-up work can all affect the final cost. A clear scope gives you a more accurate price and reduces the risk of discovering that necessary compliance work was excluded.

For builders and renovators, involve the gasfitter early. Coordinating gas pipe routes, appliance locations, ventilation, access panels and cylinder positions before walls are closed or landscaping is finished is far more efficient than correcting avoidable issues later.

A practical maintenance approach

Between professional inspections, property owners can help by keeping appliance areas clear, avoiding storage around gas equipment, checking that outdoor vents and flue terminals are not blocked, and following manufacturer servicing advice. Do not attempt to repair pipework, regulators, valves or appliance internals yourself.

If you manage several properties or a large facility, create a simple register showing each appliance, its location, fuel type, installation date, service history and next planned check. This is particularly useful for hot water systems, commercial kitchens and sites using LPG, where missed maintenance can quickly affect operations.

Gas compliance is not about creating paperwork for its own sake. It is about making sure the systems people rely on for hot water, heating and cooking are safe, properly installed and ready to perform when needed. A trusted local plumbing team can assess the work, explain any issues in plain language and help you put the right fixes in place before a small fault becomes a serious problem.