If it is safe, locate the property’s isolation valve beside the water meter, close it gently and open a cold tap to confirm the flow stops. Stay out of pooled water and do not touch wet electrical equipment.
Turn off the mains water
Check for electrical danger: Do not enter pooled water or touch wet switches, appliances, fittings or switchboards. If there is an immediate threat to life, stay clear and call Triple Zero (000). Arrange qualified electrical assistance if water may have reached electrical equipment.
Find the isolation valve: In many Sydney houses, the water meter is near the front property boundary, either exposed or inside a ground-level box. The isolation valve is usually beside it. Locations vary, particularly in apartments and older properties. Do not operate locked, sealed or unidentified valves, fire-service fittings or other utility equipment.
Close the valve gently by hand:
- A wheel or multi-turn stop tap will commonly close clockwise. Turn it until it stops, without overtightening.
- A quarter-turn lever valve is generally closed when its handle sits across the pipe rather than parallel with it.
Valve designs vary. Stop if the correct direction or fitting is unclear.
Do not force a stuck or corroded valve: Avoid pliers, extension bars, improvised meter keys or excessive force. A broken valve could worsen the leak.
Confirm the supply is off: Open a cold tap, preferably an accessible low-level or outdoor tap. Residual water may run briefly, but the flow should weaken and stop. Water held in appliances or pipework may not drain immediately.
Limit further damage safely: If there is no electrical or contamination risk, use towels or a bucket for minor leakage and move unaffected belongings. Do not loosen fittings, cut pipes or attempt repairs; plumbing work should be handled by an appropriately licensed plumber.
If one fixture is leaking and its local isolation valve is obvious, dry and safely accessible, you may close that valve instead. Do not search inside wet cabinetry or dismantle anything.
If the water will not shut off
Do not force the valve or experiment with unidentified fittings. Sustained flow may mean the valve is not fully closed, is faulty, or the property has a shared or different supply arrangement.
If the valve is inaccessible, leaks when operated, will not move with gentle hand pressure or does not stop the supply, keep clear of electrical hazards and contact our Sydney emergency plumbing team. A licensed plumber can assess a property supply that cannot be safely isolated.
For an apartment or strata property, contact the building manager or strata emergency contact because the valve may be in a locked or shared area. If the problem appears to involve the water meter or public water network, report it through Sydney Water’s current faults and emergencies channel rather than attempting repairs.