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The clearances are measured off next door

Sydney runs soft water, so what ends a unit here is almost always a spent sacrificial anode or a failed element rather than scale. That much is the same everywhere.

What is different on an inner-west block is where a replacement is allowed to go. A flued appliance has to keep a defined distance from windows, doors and vents, and those rules are about openings rather than ownership.

So when the neighbouring wall is a metre from yours with a bedroom window in it, that window is part of the calculation. It is the most common reason a unit cannot go where the owner assumed, and it is not something you can see from a catalogue.

Then there is simply getting it there. Side passages here are narrow, the old tank has to come out and the new one go in the same way, and both belong in the quoted price rather than in a conversation on the day.

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Clearances checked before quotingMeasured off every nearby opening
Access down the passage assessedOld one out, new one in, priced
Like for like where sensibleAvoids the clearance question entirely
Licensed plumberNSW Licence 368473C, fully insured

Local hot water guide

Hot water on a narrow Leichhardt block

Soft water means anodes, not scale

Sydney's supply is soft, so furring up is rarely what ends a unit. The anode is designed to corrode so the tank does not.

Once the rod is gone the tank becomes what corrodes. Changing it on schedule is cheap and adds years, and hardly anyone does.

Flue clearances are about openings, not boundaries

A flue terminal must sit a defined distance from windows, doors and vents, and the rules do not stop at your fence line.

On a block where the neighbouring wall is a metre away, their window is part of the calculation whether anyone likes it or not.

Access down the side passage matters too

A storage tank is bulky and it travels both ways: the old one out and the new one in, down the same narrow passage.

It is entirely manageable and it belongs in the quoted figure rather than being discovered by somebody halfway along it.

Continuous flow changes the arithmetic

It mounts on a wall, is a fraction of the size of a tank, and opens up positions a storage unit could never use.

On a constrained block, where gas is available, that is frequently the answer for reasons that have nothing to do with running cost.

Like for like is the simplest path

Replacing in the existing position means no new penetration, no new flue route and no new clearance question.

Where the existing spot is genuinely poor we will say so and price the alternative. We will not move a unit for the sake of it.

Which system, and whether there is anywhere to put it

Type and size decide most changeovers. On a narrow block there is a prior question worth settling first: whether a compliant position exists at all, given where the nearest openings are. Worth knowing before anything is ordered.

Indicative service life. What you get depends on how hard it is worked and whether the anode was ever changed.
System	How it heats	Typical life	On a narrow block
Electric storage	An element heats a tank, often overnight on a controlled load tariff	8 to 12 years	No flue, so clearances are easier. Needs floor space and passage access
Gas storage	A burner under a tank keeps a stored volume hot	8 to 12 years	Needs flue clearances plus floor space, the hardest combination here
Continuous flow	Gas heats water on demand, nothing is stored	15 to 20 years	Wall mounted and compact, so it usually has the most viable positions
Heat pump	Moves heat from the air into the tank rather than making it	10 to 15 years	Needs airflow, and the compressor should not sit against a shared wall
Solar with boost	Roof collectors, with an element or burner covering the gap	15 to 20 years	Roof orientation and structure decide it, and terraces limit both

Sizing it for the household

A starting point rather than a rule. Storage size is about how much you can draw before it runs out, so what counts is how many people want hot water inside the same hour rather than how many live in the house.

Continuous flow is rated in litres per minute instead of capacity, because it stores nothing and cannot run out partway through.
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
No floor space at all	Not viable	Not viable	Wall mounted, the usual answer

What hot water work costs in Leichhardt

Fixed price agreed before we start. These are indicative 2026 ranges. A clearance and access check is included in any replacement quote.

Diagnose and repair $250 – $650

Element, thermostat, valve or anode. Often the whole job on a newer unit.

Electric storage replacement $1,400 – $2,800

Like for like in the existing position, old unit carried out and taken away.

Continuous flow $1,900 – $3,500

Wall mounted, and it opens up positions a tank cannot use.

Heat pump from $3,200

Before rebate. Needs airflow and a spot where the compressor is not on a shared wall.

Clearance and access check included

Measured off every nearby opening, including the ones that are not yours.

How a hot water call-out runs.

Step 01

Booking a hot water call-out in Leichhardt

Age, position and what is next door

Three questions that decide most of it, including whether a replacement can go back where the old one was.

Step 02

Testing a hot water system at a Leichhardt property

Parts tested first

Anode, element, thermostat and valve, because a repair also avoids the entire clearance question.

Step 03

Checking flue clearances on a narrow Leichhardt block

Clearances and access measured

Off every nearby opening, and down the passage the unit has to travel, before a figure is given.

Step 04

Completed hot water installation in Leichhardt

Fitted, tested and left tidy

Run up to temperature, checked for leaks, and the old unit taken away rather than left in the passage.

Hot water questions.

What Leichhardt locals ask us before booking a plumber.

Ask us yours Licensed plumbing van covering Leichhardt and the surrounding suburbs

Is it worth repairing or replacing?

Age decides it more than the fault does. Under about eight years a failure 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 of what went wrong today. In between it depends on what has failed and what the tank looks like inside. On a narrow block there is an extra reason to prefer repair where it is genuine, because replacing like for like in the existing position sidesteps the whole clearance question.

Why do clearances matter so much on a block like this?

Because they are measured from openings, and on an inner-west block a fair number of the nearest openings are not yours. A flue terminal has to sit a defined distance from windows, doors and vents, and the rules do not stop at a boundary line. When the neighbouring wall is a metre away with a bedroom window in it, that window is part of the calculation. It is the single most common reason a hot water unit cannot simply go where the owner assumed it would.

Can I put the unit on the side passage?

Sometimes, and it is worth checking rather than assuming, because side passages here are narrow and usually have a neighbouring wall on one side. Beyond the clearance question there is access: whatever goes in has to physically get down that passage, and the old one has to come out the same way. We look at both before quoting, so the price you approve is the price for a job that can actually be done.

What if there is genuinely nowhere compliant?

There usually is, but it may not be where you expected, and a continuous flow unit changes the arithmetic considerably. It is a fraction of the size of a tank, it mounts on a wall, and it opens up positions a storage unit could never use. Where gas is available that is frequently the answer on a constrained block, quite apart from the running cost.

Does Sydney water wreck hot water systems?

Not through scale, which surprises people from harder water areas. Sydney runs soft, so limescale is rarely what ends a unit here. What fails is the sacrificial anode, a rod designed to corrode instead of the tank, and once it is used up the tank starts corroding. Replacing it on schedule is cheap and adds years, and almost nobody has it done.

Should I talk to my neighbour about it?

It costs nothing and it occasionally saves a great deal. Where a flue terminal will sit near a shared boundary, a neighbour who was told beforehand is a very different proposition from one who discovers it afterwards. We are not asking you to seek permission for compliant work, only pointing out that on blocks this close together, goodwill is worth more than most people expect.

What does hot water work cost in Leichhardt?

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 rebate. A clearance and access check is included in any replacement quote, because on these blocks it decides whether the job is possible at all.

Hot water repairs and
replacement in Leichhardt

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The clearances are measured off next door

Neighbour's window near where the unit goes?