How to Check Gas Leaks Safely Around Home

A gas smell near the cooktop, hot water system or LPG bottle is not something to investigate at leisure. The safest answer to how to check gas leaks is to first decide whether you should check at all. If you can smell gas strongly, hear a hissing sound, or someone feels unwell, move people and pets away from the area and treat it as urgent.

Do not turn lights, exhaust fans or appliances on or off. Do not use a naked flame, smoke, start a vehicle nearby or make a call on your mobile while standing near the suspected leak. If it is safe to do so, turn off the gas supply at the meter or LPG cylinder valve, then leave the area. Contact emergency services on 000 if there is immediate danger, fire or a medical emergency, and report the issue to your gas network emergency service or a licensed gas fitter from a safe location.

For Busselton and South West property owners, this cautious approach matters whether you have mains gas, bottled LPG, a gas hot water system, cooktop, heater or outdoor barbecue connection. Gas is useful and reliable when the system is sound. A leak needs prompt, qualified attention.

Warning signs of a gas leak

Natural gas and LPG are given a distinctive sulphur-like or rotten-egg odour so they can be detected. That smell is the most familiar sign, but it is not the only one. A hissing or whistling sound around a pipe, appliance connection, regulator or cylinder can indicate gas escaping under pressure.

You may also notice an appliance that will not stay lit, yellow or lazy flames where there would normally be crisp blue flames, or soot around a gas appliance. These problems do not automatically mean there is a leak, but they can point to incorrect combustion, poor adjustment or a fault that requires a licensed gas fitter.

Outside, dying or discoloured vegetation near a buried gas line may be a concern. With LPG cylinders, pay particular attention to the valve, regulator and hose connection. LPG is heavier than air and can settle in low, enclosed spaces such as drains, pits, cupboards and underneath some outdoor structures.

Headaches, dizziness, nausea or unusual tiredness can also be serious warning signs where gas appliances are operating poorly. These symptoms may be linked to carbon monoxide, which has no smell or colour. Leave the area, seek medical advice if needed and arrange an urgent professional inspection. Never rely on your sense of smell alone to rule out a gas-related hazard.

How to check gas leaks with a soapy water test

A soapy water test can help identify a small leak at an accessible external connection, such as an LPG cylinder valve, regulator or barbecue hose fitting. It is not a replacement for professional gas testing, and it is not appropriate if you already smell gas strongly or suspect a significant leak.

Only carry out this basic check outdoors or in a very well-ventilated area, with no ignition sources nearby. Keep children and pets clear. Make a solution of water with a small amount of dishwashing liquid, then apply it gently to the outside of the connection using a brush, sponge or spray bottle. Do not pull fittings apart or attempt to tighten, alter or repair gas components yourself.

With the appliance controls off, open the cylinder valve slowly if it is safe to do so. Watch the soapy solution for a minute or two. Growing bubbles or foam that continues to expand indicate gas escaping from that point. A few bubbles caused by applying the solution are normal. Bubbles that keep forming are not.

If you see persistent bubbles, close the cylinder valve if safe, keep the area clear and contact a licensed gas fitter. Do not use the appliance until it has been repaired and tested. Wipe away the soapy solution only after the gas has been isolated and the area is safe.

This method has limits. It cannot test concealed pipework, connections behind fixed appliances, internal valves, appliance components or underground lines. It also cannot confirm that an appliance is burning gas correctly. Those jobs require specialist equipment and a licensed professional.

Never use a flame to find a leak

Using a match, lighter or barbecue flame to locate a gas leak is dangerous. Even a small spark can ignite accumulated gas. The same goes for testing by repeatedly operating switches, plugging in equipment or starting appliances near the suspected source.

Electronic gas detectors can be useful as an additional early-warning tool, particularly around LPG storage or caravans. However, their placement, sensitivity and maintenance affect their reliability. A detector should support safe habits and regular servicing, not replace a proper inspection where there is a concern.

What to do if you suspect an indoor gas leak

Indoors, the priority is ventilation and evacuation, not testing. If it is safe without touching electrical equipment, open doors and windows on your way out. Avoid creating sparks. Do not operate the rangehood, air conditioner, fan or garage door.

Once everyone is outside and well away from the building, call for assistance. If you know where the gas meter isolation valve is and can reach it without entering a gas-filled area, shut it off. If you are unsure, leave it alone and wait for emergency or licensed help.

Property managers and commercial operators should have a clear process for isolating gas, protecting occupants and arranging repairs. In rental homes, tenants should report suspected leaks immediately and not attempt repairs themselves. Rural properties may have gas cylinders located well away from the house, but that does not make a leak less urgent. Wind can carry the odour, and gas can collect around enclosed service areas.

Check the common trouble spots

Regular visual checks can help you notice developing issues before they become urgent. Look over accessible gas appliance connections and LPG equipment without disturbing them. Hoses should not be cracked, perished, kinked, rubbed through or stretched. Regulators should be secure and protected from impact and excessive weather exposure.

Pay attention after renovations, moving appliances, installing a new barbecue, replacing cylinders or any excavation work near known gas services. A connection may be damaged by accidental knocks, and underground pipework can be affected by digging. If you are planning outdoor works, do not assume service locations based on memory.

Gas hot water systems deserve particular care because they often operate out of sight until hot water performance changes. Delayed ignition, burner problems, unusual noises, soot marks or a recurring gas smell are all reasons to stop using the unit and arrange an assessment.

When a licensed gas fitter is needed

In Western Australia, gas fitting work must be completed by an appropriately licensed gas fitter. This includes repairing leaks, replacing valves or regulators, altering pipework, connecting fixed gas appliances and testing a gas installation. It is not a safe or legal DIY task.

A professional can carry out pressure testing and appliance checks that go beyond a visible bubble test. They can locate leaks in concealed sections, assess whether a regulator and hose are suitable, verify gas pressure, check burner operation and make sure the installation meets current requirements. The right solution depends on the system: a leaking barbecue hose is very different from a fault in a fixed gas line or a gas hot water unit.

SmartFlow Plumbing & Gas can assist South West property owners with gas installations, gas hot water issues and safe fault assessment. If a leak is suspected, explain what you noticed, where the smell or sound occurred, whether the gas has been isolated, and if anyone has felt unwell. That information helps the right response happen quickly.

Knowing where your meter or cylinder valve is before there is a problem is one of the most practical safety steps you can take. Check it when conditions are normal, make sure responsible adults on the property know how to isolate the supply, and leave repairs and formal testing to a licensed professional.