6 Plumbing Emergencies That Need a Professional Plumber

A burst pipe can release hundreds of litres of water per hour into your home. The damage compounds rapidly — saturating walls, ceilings, flooring, and electrical wiring. In winter, pipes that have been exposed to cold temperatures are particularly vulnerable, and the burst often occurs when temperatures rise and pressure returns to the line.

If a pipe bursts in your home, immediately turn off the main water supply at the meter. Open the lowest taps in the property to drain remaining pressure. Move furniture, electronics, and valuables away from the affected area. Do not attempt to repair the pipe yourself — a temporary fix can mask the problem and lead to hidden water damage behind walls.

Related service: Leak Detection →

A gas leak is the most dangerous plumbing emergency you can face. Natural gas and LPG are highly flammable, and in confined spaces, a gas leak can create an explosion risk. Even a small leak can cause carbon monoxide poisoning over time. The distinctive rotten egg smell added to natural gas is your first warning — but not all gas leaks produce a noticeable odour.

If you smell gas or suspect a leak, do not operate any electrical switches, appliances, or open flames. Do not start your car in the garage. Evacuate everyone from the property immediately and call from outside. A licensed gas fitter with calibrated detection equipment can locate the leak, isolate it, and make the repair in compliance with AS/NZS 5601 gas installation standards.

Related service: Gas Plumbing →

When raw sewage backs up through floor drains, toilets, or shower outlets, it is classified as a Category 3 health hazard. Sewage contains bacteria, viruses, and parasites that pose serious health risks — particularly to children, elderly people, and anyone with a compromised immune system. The contamination can spread through flooring, carpet, and into wall cavities.

Do not attempt to clean up a sewage backup yourself without proper protective equipment. Avoid contact with contaminated water, keep children and pets away from the affected area, and do not use any plumbing fixtures connected to the affected drain line. A professional emergency plumber will clear the blockage, assess the cause — which may include tree root intrusion, collapsed pipes, or a main sewer line failure — and advise on any necessary decontamination.

Related service: Blocked Drains →

A major water leak — whether from a ceiling, behind a wall, under a slab, or from a failed appliance connection — can cause thousands of dollars in damage within hours. Flexi hoses under sinks and behind washing machines are one of the most common causes of catastrophic water damage in Australian homes. When a flexi hose fails, it can discharge the full mains pressure water supply into your home continuously until someone shuts off the main.

Turn off the water at the mains immediately. If the leak is near electrical wiring, switch off the power at the circuit breaker. Contain the water with towels and buckets, and move valuables to higher ground. Document everything with photos before you begin clean-up — this documentation is critical for insurance claims. Call a licensed plumber to locate the source, repair the failure, and assess whether any hidden damage has occurred behind walls or under flooring.

Related service: Leak Detection →

A hot water system failure becomes an emergency when the unit has burst and is actively leaking, the relief valve is discharging water continuously, or the system has failed completely during cold weather — particularly if you have young children, elderly family members, or anyone with health conditions that make cold water dangerous.

If your hot water tank has burst or the relief valve is discharging, turn off the power supply at the circuit breaker (for electric systems) or the gas isolation valve (for gas systems), and turn off the cold water inlet to the unit. Do not attempt to drain or move a hot water system yourself — the water inside can be near boiling temperature. An emergency plumber can isolate the system, assess whether repair or replacement is required, and in many cases install a new unit on the same visit.

Related service: Hot Water Repairs Sydney →

If you turn on a tap and nothing comes out — and this affects the entire property, not just one fixture — you may have a main water line break, a failed isolation valve, or an infrastructure issue that needs urgent diagnosis. Before calling a plumber, check with your neighbours to see if they are also affected — if they are, it may be a Sydney Water supply issue rather than a problem on your property.

If your neighbours have water and you do not, the issue is likely on your side of the meter. A main line break underground can be difficult to detect without professional equipment — the water may be escaping into the ground rather than surfacing. Call a licensed plumber who can pressure-test your supply line, locate the break using acoustic detection, and restore your water supply as quickly as possible.

Related service: Leak Detection →

What Not to Do During a Plumbing Emergency

In the stress of a plumbing emergency, it is natural to want to fix the problem yourself. But for the six emergencies above, DIY attempts almost always make things worse. Chemical drain cleaners can damage pipes and create toxic fumes during a sewage backup. Using electrical appliances near standing water creates electrocution risks. Attempting to solder or patch a burst pipe without proper tools can turn a single leak into multiple failure points.

The most useful thing you can do is isolate the problem — turn off water, gas, or power as appropriate — contain the damage, document everything, and call a licensed professional. For a full step-by-step guide, see our emergency plumbing page.

Frequently Asked Questions