Usually the one plumbing decision in a walk-up you can make on your own. We check the age and test the parts first, and the stairs are in the price rather than a surprise on the day.
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Almost everything in a six-pack needs six owners to agree. The stack, the roof, the common areas, the money. It is the reason so little gets done in small blocks.
Hot water is generally the exception. A system serving only your flat and sitting inside your lot is your property and your decision alone. No meeting, no levy, no waiting for a quorum.
What does constrain you is the building. No lift, no basement, so the unit travels up and down an external stair. That is entirely manageable, and it belongs in the price rather than appearing as a surprise once somebody is standing at the bottom of the steps.
It is also the best argument for a wall-mounted continuous flow unit if your flat has gas. A fraction of the weight and size, and the staircase stops being anyone's problem for the next twenty years.
Ask when the safe tray and its drain line were last checked. In these blocks one or the other is missing surprisingly often.
A system serving only your flat, inside your lot, is your property and your responsibility. That is the usual arrangement in a six-pack and it is worth knowing.
So a failure is not something to report to the committee and wait on. It is yours to arrange.
The space it stands in and the stair it has to travel are the building's, which is where the complication starts.
A storage tank is heavy and awkward and it travels both ways, old one out and new one in, up or down three flights of a common stairwell.
That is a real part of the job rather than an afterthought, and it belongs in the quote and in the booking.
Mention the floor when you ring, because it changes who and what we send and when we can come.
A continuous flow unit mounts on a wall, stores nothing, cannot run out, and never has to be carried up a stairwell again.
In a small flat it also gives back the floor space a cylinder was occupying, which is worth something on its own.
The trade is that it needs gas at the flat and an external wall position with the required clearances, and both are checked first.
A tank above another dwelling needs a working tray and a drain that actually goes somewhere, and a great many older installations have neither.
That is inexpensive to fit while somebody is already there and it is the difference between a wet floor and somebody else's ceiling.
If yours has no tray, or a tray with no drain line, that is worth dealing with rather than noting.
Sydney's supply is soft, so limescale is rarely what ends a unit here. The sacrificial anode corrodes in place of the steel until it is used up.
Descaling advice written for hard-water regions does not describe your cylinder at all.
Renewing an anode is inexpensive against a replacement, and where the replacement involves carrying a tank up three flights, it is worth more still.
The compliance plate carries the date. Under about eight years a failure is usually a part. Past twelve the tank lining is generally the issue and a replacement is honest.
Photograph the plate and send it through before anybody attends. It decides what comes on the van and frequently decides the answer.
In a building with no lift, avoiding a second trip is worth more than usual.
Discoloured hot water with clear cold is the tank telling you the steel inside it is corroding. It is the clearest early warning a cylinder gives.
A rumble or crackle on heating is usually sediment on the base with water trapped underneath boiling its way out.
In a flat above other people, either is a reason to plan rather than wait, because the consequence of waiting is not confined to your own floor.
A unit that empties mid-shower is generally undersized for how the household now behaves rather than faulty. Capacity is drawn down by what is taken in the same short window.
A flat let to a share household is the version people forget, because the building has not changed but the pattern of use has.
Describe the actual arrangement when you ask for advice, because that is what the sizing runs on.
A shower draws hot and cold together, so the head sets the rate the unit is drawn down at. Older heads can flow well above nine litres a minute.
In a flat this is a particularly good bet, because it needs nobody's permission and costs very little.
If it solves the problem you have avoided both the expense and the stairwell entirely.
A weeping fitting on top of a cylinder is a repair. Water from the body of the tank is not. The steel has failed and there is no patch for it.
Turn the water off at the unit, kill its power, and tell the flat below before you arrange anything else.
In a walk-up that water reaches other people's homes within hours, which is a strong argument against waiting.
Type and size decide most changeovers. In a walk-up there are two prior questions: whether your flat has its own gas at all, and what can realistically be carried up the stairs. Both are worth settling before anything is ordered.
| System | How it heats | Typical life | Suits an Ashfield flat when |
|---|---|---|---|
| Electric storage | An element heats a tank, often overnight on a controlled load tariff | 8 to 12 years | The flat has no gas of its own, which is common in these blocks |
| Gas storage | A burner under a tank keeps a stored volume hot | 8 to 12 years | The flat has its own metered gas and room for a tank plus flue clearances |
| Continuous flow | Gas heats water on demand, nothing is stored | 15 to 20 years | There is gas and wall space, and you would rather never carry a tank again |
| 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 the noise does not sit on a neighbour's wall |
| Solar with boost | Roof collectors, with an element or burner covering the gap | 15 to 20 years | Rarely, because the roof is common property and that is a strata decision |
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.
| 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 |
| Two bathrooms | Size up a step | Size up a step | 26 L/min, no wait |
| Tight cupboard | Whatever fits the space | Rarely viable | Wall mounted, no floor needed |
Fixed price agreed before we start, with the stair carry included in it. These are indicative 2026 ranges.
Element, thermostat, valve or anode. Very often the whole job on a newer unit.
Like for like in the same position, old unit carried out and taken away.
Wall mounted and off the floor. Needs gas to your own flat.
Before rebate. Where there is no gas and the position suits one.
On every hot water job. It is what stands between your tank and the flat below.
Electric storage is what most of these flats were built around, and continuous flow is where a lot of them go when the stairs get old. These are the makes behind both.
We service and replace these systems as an independent licensed plumber. We are not an agent for, or endorsed by, any of these manufacturers.
Which level you are on, how old the unit is, and how we get to it. That decides what comes up the stairs.
Anode, element, thermostat and valve checked before anyone suggests replacing a tank that may have years in it.
Same day where we can, with the carry up and down included in the price you already agreed.
Because the thing most likely to cost you money here is not the tank, it is the ceiling underneath it.
Tell us your floor and the age of the unit when you ring. On anything reasonably recent this is usually a part, and we would rather fit it than carry a tank up three flights.
Call 1300 381 569Generally not, and this is welcome news in a building where most things need six people to agree. A hot water system serving only your flat, sitting inside your lot, is your property and your decision. Where it gets more complicated is if the unit sits in a common area cupboard, if you want to change its position, or if you are switching to something that needs a new penetration through a common wall. We tell you which of those applies before you order anything.
It changes what is sensible rather than what is possible. A storage tank is bulky and heavy and it has to travel up and down an external stair, both ways, old one out and new one in. That is manageable and it is part of what we quote. But it is also the strongest argument for a wall-mounted continuous flow unit if you have gas: a fraction of the weight, a fraction of the size, and the stair stops being a consideration for the next twenty years.
Age decides it more than the fault does. Under about eight years it is usually a part: an element, a thermostat or the sacrificial anode. Past twelve you are spending on a tank whose lining is near the end regardless. In between it depends on what has failed and what the tank looks like inside. We tell you which side of that line yours is on before quoting a replacement, and on a newer unit we would far rather fit the part.
Not through scale, which catches out anyone who has moved from a harder water area. 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 itself starts to go. Changing the anode on schedule is cheap and adds years, and almost nobody ever does it.
The unit is yours, so the failure is generally yours, and this is one of the more common sources of dispute in a small block. It is also largely preventable. A tank sitting on a floor above another dwelling should have a working safe tray and a drain that actually goes somewhere, and in a lot of these blocks either the tray was never fitted or the drain line has been disconnected at some point. We check both on any hot water job, whether you asked us to or not.
Some do and some do not, and it is worth checking before buying an appliance rather than afterwards. A number of these blocks were built with a single gas service to the building rather than a meter for each flat, which makes the incoming supply common property and any new connection a decision for the owners corporation rather than for you. Where there is no gas to your flat at all, electric storage or a heat pump are the realistic options.
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 there is gas to the flat. A heat pump starts around $3,200 before rebate. Getting the old unit down the stairs and the new one up is included in the quoted figure, not added later.
Let us know which floor you are on, roughly how old the unit is, and whether it sits above another flat. That last one decides what we check before we leave.
Fixed price with the stairs included, parts tested before any replacement is quoted, and the safe tray checked either way.
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