We test the parts before quoting a new unit, and we tell you the age of yours and the specific fault in writing. On a system that is not old, that is very often a repair.
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Hot water is the job most often turned into a same-day replacement when a part would have done. Not always dishonestly, but being without hot water makes people say yes quickly, and that is a lot of the reason it happens.
The decision rule is not complicated. Under about eight years, a failure is usually the element, the thermostat or the sacrificial anode, and those are repairs. Past twelve, the tank lining is near the end whatever went wrong today.
So before anyone quotes you a new unit, two things are worth having: the age of the system, and the specific fault they found. We put both in writing on every hot water job.
If it is a repair, we will say so, because a customer who was told the truth about a $300 job is more use to us than one sold a $2,000 one they did not need.


Ask what was tested and what the result was. A written quote will still be valid tomorrow, and it might turn out to be a part.
The common failures at that age are the element, the thermostat or the sacrificial anode, and all three are parts rather than a new system.
A replacement quoted on a unit that young deserves a straight question about what exactly was tested.
By then the tank's internal lining is near the end of its life whatever the immediate fault was, and spending on parts buys very little time.
That is the honest answer even though it is the expensive one, and we will give it.
Sydney's supply is soft, so limescale is rarely what kills a unit here, which catches out anyone from a hard water area.
The anode is a rod designed to corrode instead of the tank. Once it is gone, the tank is what corrodes. Replacing it on schedule is cheap and adds years.
If water is coming from the tank itself rather than a fitting, that is the one case where replacement is the only answer and any plumber will tell you the same.
Water from a valve, a connection or the relief line is a different matter and is often a small job.
Two facts, and they decide the entire decision. Any plumber can supply both in the time it takes to write a quote.
If a replacement is being proposed and neither has been mentioned, that is worth asking about before you agree to anything.
Install price is only half the decision. The cheapest unit to put in is generally the dearest to run, and over ten years that gap is larger than the difference in purchase price. Worth understanding before choosing rather than after the first bill.
| System | How it heats | Typical life | Worth choosing when |
|---|---|---|---|
| Electric storage | An element heats a tank, often overnight on a controlled load tariff | 8 to 12 years | Upfront cost is the constraint and there is no mains gas to the street |
| Gas storage | A burner under a tank keeps a stored volume hot | 8 to 12 years | Mains gas is available and there is room for a tank plus flue clearances |
| Continuous flow | Gas heats water on demand, nothing is stored | 15 to 20 years | There is mains gas, and you want it never to run out mid-shower |
| Heat pump | Moves heat from the air into the tank rather than making it | 10 to 15 years | There is no gas, there is airflow, and rebates bring the price down |
| Solar with boost | Roof collectors, with an element or burner covering the gap | 15 to 20 years | The roof suits it and the upfront budget is there |
A starting point rather than a rule. Storage size is about how much you can draw before it runs out, so what matters is how many people want hot water inside the same hour rather than how many live in the house.
| People in the house | 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 |
| 5 or more | 315 to 400 L | 170 L or twin | 26 L/min |
| Two bathrooms at once | Size up a step | Size up a step | 26 L/min, no wait |
Written down with the age of your unit and the fault we found, before you agree to anything. These are indicative 2026 ranges, published so you can compare any quote against them.
Element, thermostat, valve or anode. Very often the whole job on a newer unit.
Like for like in the same position, old unit removed and taken away.
Nothing stored, nothing to run out. Needs mains gas at the property.
Before rebate. The efficient answer where there is no gas to the house.
The two facts that decide repair or replace, written down before you choose.
These are the makes we repair and install. We will always tell you the age of your unit and whether a part will fix it before quoting a replacement.
We service and replace these systems as an independent licensed plumber. We are not an agent for, or endorsed by, any of these manufacturers.








It decides most of this before anyone drives anywhere, and it tells us what parts to bring.

Element, thermostat, valve and anode checked before anyone suggests a new system.

Both facts written down with the price, so the decision is yours and you can take it away.

Same day where we can, tested on completion, and the old unit taken away if it is a changeover.
Tell us the age of the unit when you ring. On anything reasonably recent this is very often a part, and we would rather fit it than sell you a tank.
Call 1300 381 569
Age is the rule, and it is worth knowing before anyone comes out. Under about eight years, a failure is usually a part: a thermostat, an element or the sacrificial anode. Those are repairs and they are not expensive. Past twelve years you are spending on a tank whose lining is near the end regardless of what failed today, so replacement generally is the honest answer. Between those it depends on what has gone and what the tank looks like inside. Ask any plumber to tell you the age and the specific fault before they quote a new unit.
Not without testing it. There are cases where it is obvious, mainly a tank that has rusted through and is leaking from the body, and no plumber can repair that. But a unit that has simply stopped producing hot water needs the element, thermostat, valve and anode checked before anyone can honestly say it is finished. If a replacement is proposed without any of that happening, it is fair to ask what exactly was tested and what the result was.
Sydney's water is soft, so limescale is rarely the culprit here, which surprises people from harder water areas. What fails is the sacrificial anode, a rod that is designed to corrode so the tank does not, and once it is used up the tank itself starts to go. Beyond that, elements burn out and thermostats fail. The first three are parts. Only the tank is a replacement.
Only if you actually want to. Being without hot water is genuinely unpleasant, and that is exactly what makes it easy to sell an unnecessary replacement on the spot. A written quote with the licence number, the age of the unit and the specific fault on it costs you nothing and takes ten minutes. If it is a repair, you will have saved a great deal. If it is a replacement, the quote will still be there tomorrow.
Where mains gas reaches the property, continuous flow is hard to beat: nothing stored, nothing to run out, and it comes off the floor. Where there is no gas, a heat pump is the efficient option and government rebates generally apply. Straight electric storage is the cheapest to install and the most expensive to run over its life, which is a trade worth understanding rather than defaulting into.
A like-for-like changeover in the same position is usually a few hours and very often same day. Switching type, for instance storage to continuous flow, takes longer because the pipework and sometimes the gas or electrical supply has to change. We tell you which it is when we quote, along with anything that needs another trade, rather than discovering it halfway through.
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 installed. A heat pump starts around $3,200 before any rebate. Every figure is written down with the age of your unit and the fault we found, before you agree to anything.
Let us know roughly how old the unit is, and whether anyone has already told you it needs replacing. We are happy to give a second opinion on that.
Parts tested first, the age and the fault written down, and a price you can take away and think about.
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