Losing hot water counts as losing an essential service, so it is an urgent repair. Whether yours is a part or a whole unit matters more here than most places, and we say which first.
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Losing hot water is loss of an essential service, which makes it an urgent repair. So a tenant who cannot reach anyone has a path: arrange a licensed plumber, then seek reimbursement of reasonable costs up to $1,000 within 14 days of written notice.
The cap is where this gets interesting, and where people get caught. A repair to an element, a thermostat, a valve or an anode usually runs $250 to $650. That fits inside $1,000 comfortably.
A replacement starts at $1,400 and climbs. A tenant who authorises one is very likely to be funding part of a permanent improvement to a property they do not own, and there is no mechanism to get that difference back.
So we diagnose properly and tell you which it is before anything is agreed. If it is a part, we fit it. If the tank is finished, you get that in writing to put to the owner, and we do not quietly let a tenant sign off on a replacement.


Pause. A replacement is well past what an urgent repair claim covers. Get the diagnosis in writing and put it to the owner.
Its failure is treated as an urgent repair, which is what gives a tenant a path to act when nobody can be reached.
The usual sequence still applies: try the agent, note the time, then arrange a licensed plumber if it is genuinely urgent.
A repair typically sits at $250 to $650, comfortably inside. A replacement starts around $1,400 and does not.
That single difference decides whether a tenant can act at all, or whether this has to go back to the owner.
Under about eight years it is usually a part. Past twelve the tank lining is near its end regardless of today's fault.
In between it depends on what failed and what the inside of the tank looks like, which is a matter of testing rather than opinion.
Sydney's supply is soft, so furring up is rarely what ends a unit here. The anode corrodes so the tank does not.
Once the rod is consumed the tank becomes what corrodes. Replacing it on schedule is cheap and adds years, and almost nobody does it.
An owner asked to spend two thousand dollars on the word of a tenant will usually wait. Asked on the basis of a written test result, they generally act.
We provide that either way, whether or not we end up doing the replacement.
Type and size decide most changeovers. Here there is a prior question that matters more: whether this is a repair a tenant can act on or a replacement that belongs to the owner. The table below is for whoever is making that call.
| System | How it heats | Typical life | Who normally decides |
|---|---|---|---|
| Electric storage | An element heats a tank, often overnight on a controlled load tariff | 8 to 12 years | Repairs can fall to a tenant under $1,000; replacement is the owner's |
| Gas storage | A burner under a tank keeps a stored volume hot | 8 to 12 years | Same split. Needs gas metered to the individual flat |
| Continuous flow | Gas heats water on demand, nothing is stored | 15 to 20 years | Owner decision. It is a change of system, not a repair |
| Heat pump | Moves heat from the air into the tank rather than making it | 10 to 15 years | Owner decision, and often a strata one if it changes the exterior |
| Central building system | One plant serving multiple flats | Varies | Entirely the owners corporation's, never an individual's |
A starting point rather than a rule. Storage size is about how much you can draw before it runs out, so the number that matters is how many people want hot water inside the same hour rather than how many live there.
| People in the flat | Electric storage | Gas storage | Continuous flow |
|---|---|---|---|
| 1 to 2 | 125 to 160 L | 90 to 135 L | 16 L/min |
| 3 to 4 | 250 to 315 L | 135 to 170 L | 20 L/min |
| Share house, staggered | Size up, or accept a wait | Size up | No change, it does not run out |
| Two bathrooms at once | Size up a step | Size up a step | 26 L/min |
Given in writing with the diagnosis before anything proceeds. These are indicative 2026 ranges, and the first line is the one that generally fits inside a capped claim.
Element, thermostat, valve or anode. Usually inside a $1,000 reimbursement.
Beyond a tenant claim. This one belongs to the owner.
Where the flat has its own gas. An owner decision, not a tenant one.
Before rebate, where there is no gas and the position suits one.
Which side of repair-or-replace you are on, in a form you can send to an owner.
These are the makes behind most of the hot water calls we take here. We will always tell you the age of the unit and the specific fault before anyone talks about replacing it.
We service and replace these systems as an independent licensed plumber. We are not an agent for, or endorsed by, any of these manufacturers.








Two questions on the phone that decide the whole shape of this, including who we should be invoicing.

Anode, element, thermostat and valve checked before anybody uses the word replacement.

Repair or replacement, with the figure, so a tenant knows what they can act on and an owner knows what they must.

Fixed same day where it is a part. Where it is not, you leave with the document that gets the owner moving.
Tell us the age of the unit and whether you rent. On anything reasonably recent this is usually a part, which is also the version you can actually do something about.
Call 1300 381 569
Loss of an essential service is treated as an urgent repair, and hot water is an essential service. So the same path applies as any urgent repair: contact the agent or landlord and note the time you tried, and if nobody is reachable you can arrange a licensed plumber and seek reimbursement of reasonable costs up to $1,000 within 14 days of written notice. The usual conditions apply, and the Tenants' Union of NSW or NSW Fair Trading can advise on your situation.
For a tenant it matters enormously, because of the cap. A repair to an element, thermostat, valve or anode typically runs $250 to $650, which sits comfortably inside $1,000. A replacement starts at $1,400 and goes up from there, which does not. So a tenant arranging a full replacement is very likely to be out of pocket for the difference. That is why we diagnose precisely and tell you which side of the line yours is on before anything is agreed, rather than after.
Age decides it more than the fault does. Under about eight years the failure is usually a part, and the common ones are an element, a thermostat or the sacrificial anode. Past twelve you are spending on a tank whose lining is near the end regardless of today's fault. In between it depends on what has gone and what the tank looks like inside. We test rather than guess, and we say plainly what we found.
Stop, and put it to the landlord or agent in writing. A replacement is beyond what you can reasonably expect to recover under the urgent repairs provision, so arranging it yourself is how tenants end up funding an improvement to somebody else's property. What we can give you is a written diagnosis showing the unit has failed and cannot economically be repaired, which is exactly what an owner needs in order to act.
Not through scale, which surprises people from harder water areas. Sydney runs soft, so limescale is rarely the cause. What fails is the sacrificial anode, a rod designed to corrode instead of the tank, and once it is gone the tank starts corroding. Beyond that, elements burn out and thermostats fail. Three of those four are parts.
Usually still the lot owner's if it serves only one flat, even where it sits outside the front door, but the space around it is common property and that affects access and any change of position. Where a building has a central system serving multiple flats it is the owners corporation's entirely. We establish which arrangement your block has, because it changes who you should be talking to.
Diagnosing and repairing an element, thermostat, valve or anode is $250 to $650. Replacing electric storage in the same position is $1,400 to $2,800. Continuous flow is $1,900 to $3,500 where the flat has gas. A heat pump starts around $3,200 before rebate. We give the figure and the diagnosis in writing before anything proceeds.
Let us know whether you rent or own and roughly how old the unit is. If you rent, we will tell you before we start whether this is likely to sit inside what you can claim.
Parts tested first, the diagnosis in writing, and no tenant quietly signing off on a replacement they cannot recover.
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