How to turn the water off in an emergency: and what that tap tells you.
A braided hose under the vanity lets go and a house can take on a serious amount of water before anyone works out where it is coming from. The valve that stops it takes about five seconds to turn, if you already know where it is. Here is where to look, which one to reach for first, and the thing the meter tap tells you the moment the flow stops.
There are three places you can stop the water, and you use whichever one you can reach fastest. The stop tap at the fixture, the main isolating valve where the supply enters the house, and the tap at the water meter near your front boundary. The meter tap stops everything, and Sydney Water’s own advice, when water is running on a property, is to go and turn it off.
That same tap also tells you whose problem it is. Sydney Water owns your meter, and you are allowed to turn its tap on and off. If the flow stops when you close it, the fault is in your pipes, and in NSW that repair has to be done by a licensed plumber. If water keeps running with the meter tap shut, the fault is upstream of the meter, which is Sydney Water’s side, and their fault line is 13 20 90.
The first minute, in the order that matters
Nobody reads a guide while the laundry is filling up. So this is the short version, and the rest of the page is the detail worth having read before the day it happens.
- Look before you step. If water has reached power points, an appliance or the switchboard, do not walk into it. That is no longer a plumbing problem first, it is an electrical one.
- Shut it off at the nearest point that will actually work. If the water is coming from one fixture, use that fixture’s stop tap. If it is coming from a pipe, or you cannot tell, go straight to the main valve or the meter. Do not lose three minutes hunting for the tidy option.
- Turn the hot water system off if you have shut down the whole house. An electric element heating a cylinder that is emptying will wreck itself.
- Open the lowest tap you have, usually an outside tap or the laundry, to drop the pressure and drain what is still sitting in the pipes.
- Move what can be moved, photograph what cannot. Insurers want to see it before you start mopping.
- Ring a licensed plumber. The water being off is not the repair, it is the pause button.
Your three shut-off points
Every home in our area has at least two of these and most have all three. They stop different amounts of the house, which is the whole reason it is worth knowing which is which before you need one.
| Shut-off point | Where to look | What it stops |
|---|---|---|
| Fixture stop tap | On the pipes under a sink or vanity, on the wall or floor beside the toilet, on the wall behind the washing machine or dishwasher, and on the inlet and outlet of the hot water unit. | That one fixture. The rest of the house keeps working, which matters if the repair is going to take a few days. |
| Main isolating valve | Where the supply enters the building. Commonly near the meter, at the front of the house, near the hot water unit, in the laundry, under the kitchen sink, or on an external wall. | The whole house, from that valve inwards. Not every home has one, and not every one that has one still turns. |
| Meter tap | At the water meter, usually near the front boundary just inside your property line, in a ground-level box with a lid. | Everything on the property, including outside taps and irrigation. This is the one that still works when the others have seized. |
Work from the smallest one that will do the job. A stop tap under the vanity means the kitchen still runs and the toilet still flushes while you wait for a plumber, which makes for a much better weekend than shutting the whole property down.
The tap at the meter, and what it tells you
This is the one worth understanding properly, because it does two jobs. It stops the water, and it draws the line between your problem and Sydney Water’s.
Where it is, and getting the lid up
In the Sydney Water area the meter usually sits near the front boundary, just inside your property line, in a ground-level box with a lid. On plenty of the places we go to, that lid has not been lifted since the house was built and there is now a hedge, a garden bed or half a driveway over it. Finding that out on a dry Saturday costs you ten minutes. Finding it out at 11pm with water running costs a great deal more.
In units and townhouses the meters are often grouped together in a common meter room or cupboard, one per lot. Find yours, and check it is actually marked with your unit number, because they are not always.
Turning it
Sydney Water is direct about this: a meter tap controls the water supply to your property, and you can turn it on and off. What you cannot do is treat it as a garden tap, so no hoses on it and no filling buckets from it.
- A lever handle is a quarter-turn valve. Turn it so the lever sits across the pipe rather than along it, and it is closed.
- A round or wheel handle turns clockwise to close, and it will usually take several full turns before it stops.
- The tool varies. Most turn by hand or with a small shifter. Some older ones want a key. Work out which yours is now, and keep whatever it needs somewhere the whole household knows about, not in the bottom of the ute.
The part most people miss
Once that tap is closed, watch what happens for a minute, because the answer decides who you ring.
If the flow stops, the problem is in your pipes. Everything from the meter to your building belongs to the property owner, and in NSW that repair has to be done by a licensed plumber.
If water keeps running with the meter tap shut, the problem is upstream of the meter. That is Sydney Water’s side. A leaking meter, a leaking meter tap, or a leak in the pipes between the meter and the street may all be fixed by them. Ring 13 20 90, which they staff around the clock, before you pay anyone to dig.
It is the same boundary question that decides who pays when a blockage is in Sydney Water’s main, and it is worth landing on the right side of it before the work starts rather than after the invoice.
The main valve inside your boundary
Most homes have a valve where the supply enters the building, and it is the one people reach for first because it is usually under cover and does not involve kneeling in a wet garden bed.
Look near the hot water unit, under the kitchen sink, in the laundry, in a utility cupboard, or on the external wall where the line comes in. On a lot of Penrith-area homes it is at the front of the house within a metre or two of where the service enters.
- Lever handle. A quarter-turn ball valve. Handle along the pipe means open, handle across the pipe means closed. Quick, positive, and the type most likely to still work in twenty years.
- Wheel or round handle. A gate valve. Clockwise to close, and expect several turns. Anticlockwise to open.
Old gate valves that have not been touched in fifteen years are the classic failure. The spindle seizes, and the handle either spins uselessly or the stem shears off inside the body. A seized valve that gets forced can also come apart, which turns a leak somewhere else in the house into a leak right where you are standing.
If it will not move with reasonable hand pressure, leave it and go to the meter tap. Then get the valve replaced afterwards, because a shut-off you cannot operate is not a shut-off. The same goes for one that closes but still lets water past: it has failed, it just has not told you yet.
Stop taps at the fixture, and the hose that causes most of this
For anything contained, a running toilet, a dripping mixer, a washing machine hose that has let go, you do not need to shut the property down. There is almost certainly a stop tap within arm’s reach of the problem.
- Under sinks and vanities: small chrome taps on the pipes feeding the tapware, usually one for hot and one for cold. Often an oval handle or a screwdriver slot.
- At the toilet: on the wall or floor near the base of the cistern, on the pipe feeding the inlet valve.
- Behind the washing machine and dishwasher: the wall taps the hoses screw onto.
- At the hot water unit: isolating valves on the cold inlet and, on many installs, the hot outlet as well.
Clockwise to close, or a quarter turn on a lever type. Same rule as everywhere else on this page: if it does not want to move, do not lean on it.
Braided flexible hoses are the short silver-jacketed connectors between the stop tap and the tapware, and they are behind a large share of the sudden indoor flooding we get called to. They do not last forever, and they tend to fail all at once rather than start with a polite drip.
Look at the braid. Rust spots, fraying strands, or any bulging means replace it now, not at the next renovation. They are cheap, they have a manufacturer’s service life, and a vanity cupboard is a much easier place to do that work than a flooded hallway.
Stopping the flow is not fixing the pipe.
Shutting the water off buys you time and stops the damage getting worse. It does not repair anything, and in NSW plumbing and drainage repairs have to be done by a licensed plumber. We cover Penrith and Western Sydney, we tell you what it costs before the work starts, and after-hours is by arrangement at an uplifted rate that gets disclosed before you book.
Turn the hot water off as well
This gets skipped constantly and it is the step that turns a plumbing bill into a plumbing bill plus a new hot water system. If you have shut the mains off, the cylinder can end up heating with not enough water in it, and the element or the tank will not survive that.
- Electric storage: switch off the dedicated circuit at the switchboard. It is often labelled HWS or hot water, and it may be on a separate off-peak circuit.
- Gas storage: turn the gas control on the unit to off, or to pilot if that is what it offers.
- Continuous flow gas: isolate the gas at the appliance, and switch off the power if it has one.
- Solar: turn the booster off too, whether that is an electric element at the switchboard or a gas booster at the unit.
Turn it back on only once the mains is back on and water is running steadily from a hot tap, so you know the cylinder has refilled. On an electric unit in particular, powering up a partly empty cylinder is how elements die.
Once the water is off
The flow has stopped. Now the job is limiting what the water already in the building does next, and collecting what you will need later.
- Drain the pressure down. Open the lowest tap in the house, usually an outside or laundry tap, and open a high one as well so air can get in behind it. That empties what is still sitting in the pipework and stops it finding its way out through the damaged section.
- Get things off the floor. Lift rugs, move furniture legs onto blocks or foil, and get anything absorbent out of the wet area. Water wicks upward into skirtings and chipboard faster than most people expect.
- Photograph and video everything before you clean up. Wide shots and close shots, including the failed part itself. Keep the failed hose or fitting rather than binning it.
- Keep the invoice and the plumber’s description of the fault. Insurers and Sydney Water both ask for it, for different reasons.
- Stay out of any area where water has reached electrics. Standing water near power points, an appliance or the switchboard is a licensed electrician’s problem, and if the switchboard itself is involved, your electricity distributor, which across the Penrith area is Endeavour Energy. If anyone is at risk, that is a triple zero call, not a research project.
Shut the mains off and wait. If the dripping slows and stops within a few minutes, it was a pressurised water pipe. That is a plumbing repair and the water staying off has already limited the damage.
If it keeps coming with the mains off, it is not a pressurised pipe. The realistic candidates are a broken waste pipe, the waterproofing membrane in the wet area above, or the roof. We will find the source and tell you which. If it turns out to be the membrane, you want a waterproofer, because waterproofing is not our trade and you are better served by being told that than by a plumber having a go at it.
Turning it back on without causing the next problem
Once the repair is done and your plumber has told you it is right to restore supply, the order and the speed both matter.
- Meter tap first, then the internal main valve, then the fixture stop taps. Work back down the chain the same way you came up it.
- Open everything slowly. A fast open sends a pressure surge through pipework that has just been drained, and that surge will happily find the next weakest joint in the house. There is no prize for doing it quickly.
- Bleed the air out. Start at the lowest tap and work upwards, cold then hot at each one, and let them splutter and cough until the flow runs clean and steady.
- Bring the hot water system back last, once a hot tap has run steadily and you know the cylinder is full.
- Walk the house. Check under every sink, around the repair, and at the hot water unit. Then turn everything off and look at the meter: with nothing running, the leak indicator should be completely still.
Sydney Water runs a hidden leak allowance for concealed leaks that a licensed plumber or qualified technician has found and repaired. It is applied against your bill, it has its own eligibility criteria and time limits, and it is one of the few things in this business where the paperwork genuinely pays.
Keep the invoice, make sure it describes the leak and the repair rather than just saying “plumbing”, and check the current criteria on Sydney Water’s page. The link is in the sources at the bottom.
Find Your Shut-Off Points Before an Emergency Happens
Everything above is easier if it is not the first time you have seen any of it. This is a genuinely short job and it is the single most useful thing a homeowner can do about plumbing without being a plumber.
- Lift the meter box lid. Clear whatever has grown over it, and confirm the tap actually turns.
- Work out what your meter tap needs, hand, shifter or key, and keep that where the household can find it.
- Find the internal main valve and turn it fully off and back on once. That is how you discover it has seized on a dry afternoon rather than on a bad night.
- Test the stop taps under each sink and vanity, at each toilet, and behind the washing machine.
- Label them. A luggage tag or a paint pen is enough. It also helps whoever is house-sitting.
- Show every adult in the house where the three shut-off points are. Walk them out to the meter, do not just describe it.
- Look over the flexi hoses while you are under there.
- Put it in the calendar once a year. Valves seize from doing nothing, which is exactly what most of them do.
If a valve does not turn, or you cannot find a main isolating valve at all, that is worth mentioning next time we are on site. Replacing a dead stop tap is a small job on a normal day and an expensive one in the middle of a flood.
Common questions
Am I allowed to turn off the tap at my own water meter?
The meter tap is off and water is still running. What now?
The valve is seized and will not turn. Do I force it?
Can I just isolate one part of the house?
Do I really have to switch the hot water system off too?
Water is coming through the ceiling but the mains has been off for an hour and it has not stopped.
Can I repair a burst pipe myself if I have already turned the water off?
Sources & Plumbing References
The ownership boundary, the meter tap rules and the leak allowance are Sydney Water’s, and they set and revise them. The licensing requirement is the NSW Government’s. These are the pages to check rather than taking our word for it.
Written 28 August 2026 and correct against Sydney Water’s and the NSW Government’s published information on that date. General information for property owners in our service area, not advice on your specific installation. Sydney Water sets and revises its own service standards, responsibilities and allowances.