Repaired or replaced, often the same day. In a house that has been extended around the cylinder for seventy years, where it sits matters as much as what it is.
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Diagnosing a hot water fault here is the same as anywhere. Sydney's water is soft, so a storage tank is protected by a sacrificial anode that corrodes so the steel does not, and the day that anode is spent the tank begins to go. That or a burnt element is most of it.
What is different is the geometry. The orchards here were subdivided from the late 1940s, and the houses that went up have been extended repeatedly since: a bathroom added, a kitchen moved, a room off the back.
The cylinder generally did not move. So the run from it to the newest fixture can be a great deal longer than the footprint suggests, and the complaint that arrives is not no hot water but a long wait at one particular tap.
That is worth separating out, because it is not a fault in the unit. Replacing a perfectly good cylinder does not shorten a pipe run, and somebody should say so before you buy one.
That is usually the pipe run rather than the unit, and a new cylinder will not change it.
No hot water at all, lukewarm only, or plenty of hot water that runs out too fast are three different faults with three different bills. The first is usually an element or a thermostat, the second is frequently a thermostat drifting, and the third is not a fault at all.
Have the compliance plate to hand when you ring. It carries the make, the model and a date, and it turns repair-or-replace from an opinion into arithmetic. Most people guess the age of their unit and most people guess low.
In hard-water parts of the world a cylinder silts up and that is what ends it. Sydney's supply is soft, so that is not what happens here. What goes first is the sacrificial anode, a rod that is designed to corrode instead of the steel around it.
Once it has been consumed the tank itself starts to go. Replacing an anode on a cylinder that is otherwise sound is the best value job in this trade: a fraction of the price of the tank it is protecting, and the only maintenance that genuinely adds years.
These houses were subdivided off orchard land from the late 1940s and most have been extended at least once since. The cylinder almost never moved with them. It is still on the original wall, which was the back of the house when it was installed and is now the middle of it.
So the distance from the unit to the newest bathroom is frequently much further than the distance to the original one. That is not a fault in the system, and it is the single most common reason people are unhappy with a hot water unit that is working correctly.
What comes out first is the water that has been sitting in the pipe since the last time anybody used it, and it is cold. The further the fixture is from the cylinder, the more of it there is to clear before the hot arrives.
A new unit does not shorten that pipe, so a changeover will not fix it. The honest options are insulating the run, moving the unit closer to the demand, or a second point of supply, and all three are worth pricing before anybody condemns a working tank.
Where the cylinder sits, and what fuel reaches it, limits the shortlist more than preference does. Continuous flow needs gas at the property and a wall position that meets the flue clearances. A heat pump needs genuine airflow around it, not a cupboard.
That gets established at the property before anything is ordered, because a unit that cannot legally or physically go where the old one was is not a cheaper option. It is a delivery that goes back on the truck.
Water from a pipe or a valve near the unit is frequently not the tank at all. Water weeping from the body of the cylinder is different: the steel has gone and there is no version of that which gets patched.
Isolate it and ring. The flooring, the cabinetry and whatever is stored around it will cost more than the replacement does, and that bill grows every day the decision is put off.
Once a repair is genuinely off the table, the choice is between five types, and the right one depends on the house rather than on the brochure.
Type and capacity settle most changeovers. In a house that has been extended repeatedly there is a prior question, and it is the one nobody asks: how far does the water have to travel to the fixture people actually complain about. Sizing a bigger tank to solve a distance problem buys a bigger tank and the same complaint.
The tables below set out what each type needs from the property and how to size it against the busiest hour rather than the number of bedrooms. Read them as an opening position for a conversation, not a rule: a household that showers in one narrow window needs something different from one that spreads it across the day, even with the same number of people in the house.
Type and capacity settle most changeovers. In a house extended repeatedly there is a prior question: how far the water has to travel to the fixture people actually complain about.
| Type | How it heats | Expected span | Suits an Eastwood house when |
|---|---|---|---|
| Electric storage | A submerged element warms a stored tank | About 8 to 12 years | There is no gas, and the existing position already suits a tank |
| Gas storage | A burner underneath holds the volume hot | About 8 to 12 years | Gas reaches the house and flue clearances can be met |
| Continuous flow | Heated in transit, nothing held back | About 15 to 20 years | Gas is available and it can sit closer to the demand |
| Heat pump | Ambient warmth moved into the tank | About 10 to 15 years | There is outdoor space with airflow, which these blocks usually have |
| Solar with boost | Roof collectors, with an element covering the gap | About 15 to 20 years | The roof orientation works and the run is not the real problem |
An opening position rather than a rule. With storage the question is how much can be drawn before it empties, so what counts is how many people want hot water inside one hour.
| Occupants | Electric storage | Gas storage | Continuous flow |
|---|---|---|---|
| One or two | 125 to 160 L | 90 to 135 L | 16 L/min |
| Three to four | 250 to 315 L | 135 to 170 L | 20 L/min |
| Five 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 |
Fixed price agreed before anything starts. These are indicative 2026 ranges.
Comes off the repair if you decide to go ahead.
The usual failure on electric storage, and a repair rather than a new unit.
The one modest job that genuinely extends a tank worth keeping.
Supplied and fitted, with the old one taken away.
Where gas reaches the house and a compliant flue position exists.
Plenty of electric storage through the postwar housing, gas on the streets that were plumbed for it, and continuous flow wherever a cylinder could be moved nearer the demand. This is the equipment behind all of 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.
And how far it is from the tap you are complaining about. That answer sometimes ends the conversation early, in a good way.
The compliance plate gets read and you hear the real age before anybody says the word replacement.
If an anode, an element or a thermostat genuinely fixes it, that is the quote you get.
The old unit goes with us, the new one goes in to standard, and the warranty is written down.
Same-day is usually achievable, and it lands on the repair side of the line more often than people brace themselves for.
Call 1300 381 569On electric storage, look for a tripped circuit at the switchboard, which explains more call-outs than anything else. On gas, check the pilot or ignition and that the supply is on. On either, find out whether an isolation valve was closed by somebody working on something else. Beyond that, leave it and ring.
Very often. Sydney's water is soft, so the limescale that finishes tanks in hard-water regions is not the story. A sacrificial anode is consumed protecting the steel, and once it is gone the tank starts corroding. That or a failed element covers most of what we attend.
Frequently because the house grew and the unit did not move. These houses were built on subdivided orchard land from the late 1940s and extended repeatedly, so the run from the cylinder to the newest bathroom can be a great deal longer than the building looks.
Sometimes, and it is worth being honest about the options. Moving or resizing the unit, insulating a long run, or in some cases a second point of supply. What it is not is a problem with the unit, so replacing the cylinder alone usually changes nothing.
It depends on type, installation and whether the anode was ever looked at, so we will not put a number on a unit we have not seen. We will read the compliance plate, tell you the real age, and say plainly whether repairing it still adds up.
No. A leaking storage tank is the end of that unit, and the water damage while somebody decides usually exceeds the cost of replacing it. Isolate it and ring.
Diagnosis and report is $120 to $250, credited against the repair if you proceed. An element or thermostat is $250 to $550. An anode replaced is $300 to $600. A storage replacement is $1,400 to $2,800 installed, with removal and disposal included.
Tell us where the unit sits, roughly how old the house is, and whether the problem is no hot water or a long wait at one tap. Those are different faults.
Repair quoted before replacement, and a written warranty either way.
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