Hot Water Heater Replacement Sydney - Old Tank Out, New One In
Tank leaking, rusted out or running cold? Our licensed plumbers replace gas, electric and continuous flow hot water heaters across Sydney, with one fixed price agreed before the old one comes out.
- $0 call-out fee*No charge just to come and look
- Fixed Price QuotesUpfront pricing before work starts
- Aussie owned & operatedFamily-owned in Sydney since 2010
- Lifetime guaranteeIf our work fails, we fix it
Free quotes · No hidden costs · Licensed & insured · Lic #306457C
*No call-out fee during business hours, Monday to Friday 7am to 4pm. Mr Splash VIP lifetime members pay no call-out fee at any time. After-hours and weekend call-outs may attract a fee at our discretion, and we will always confirm it with you before we attend.
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The Hot Water Heater Replacements We Do
Old tank out, new one in, with the price agreed before the old one is disconnected.
Leaking Or Burst Tanks
Water coming from the tank itself, not a valve or fitting, means the inner tank has rusted through and cannot be patched, so it gets replaced. A dripping valve can often be repaired instead.
No Hot Water From An Old Tank
When an older electric tank or gas unit stops heating, we check it first and tell you straight whether a repair or a new heater is the better spend.
Gas Tank Replacements
Old gas storage tanks, inside or out, disconnected and replaced, with the gas connection leak-tested before we leave. Our gas hot water installation page covers gas units in more detail.
Switching To Continuous Flow
Swapping an old tank for an instant hot water unit on an outside wall or in a recess box, which frees up the space the tank took.
How Bad Is Your Hot Water Heater?
Three signs your hot water heater needs attention, from most to least urgent.
Tank Leaking Or Burst
Turn the power off at the switchboard or the gas off at the unit, close the cold water valve on the pipe into the tank so it stops refilling, then call.
Stopped Heating
An older unit that has stopped heating may need a new part or may be at the end of its life. Book us in and we tell you which before any work is done.
Old, Rusty Or Running Out
A tank over 10 years old with rust at the base, or one that runs out after two showers, still works but is near the end. Replacing it now means you choose the new heater instead of taking whatever is available the day it fails.
How We Replace A Hot Water Heater
Hot water heater replacement Sydney wide, done in one visit where we can, with the price agreed first.
Fixed price firstCheck And Price It
We look at the old heater, the space, the water pressure and the gas or power supply, then give you one fixed price for the new system installed.
Licensed plumbersOld Out, New In
The old heater is drained, disconnected and taken away, and the new one goes in with new valves where they are needed. If it is moving to a new spot, the pipework moves with it.
Tested before we leaveFill, Fire Up And Test
We fill the new heater, check every joint and valve for leaks, make sure it is heating, and show you how it works.
Free Call-Out, Free Quote, Fixed Price
Nothing to pay until you say yes. Here is how it works.
We come out, no call-out fee*
A licensed plumber comes to you, looks at the problem and tells you exactly what is going on. No charge for the visit during business hours.*
You get a fixed-price quote, free
Before any work starts you get the full price in writing. Not an hourly rate, not an estimate that grows once we are in the walls.
You only pay when you say yes
Accept the quote and we start. The price you accepted is the price you pay, however long the job takes. What you see is what you get.
*No call-out fee during business hours, Monday to Friday 7am to 4pm. Mr Splash VIP lifetime members pay no call-out fee at any time. After-hours and weekend call-outs may attract a fee at our discretion, and we will always confirm it with you before we attend.
Video Testimonials
Old Tank Out. Hot Water Back.
Tell us what your hot water heater is doing and a licensed plumber will call you straight back with a time and a fixed price.
- Fixed Price QuotesOnce we have seen the old heater and where the new one will go, you get one price for the new system installed and the old one taken away. It holds even if the old fittings are seized.
- No Call-Out Fee*Having a plumber look at your old hot water heater and price the replacement costs you nothing during business hours. Nothing is charged for the new system until you have said yes to the price.
- Pay Later At 0%A hot water heater never picks a good week to give out. Spread the fixed price of the new one over a 0% interest payment plan and get hot water back without waiting.
*Terms and conditions apply.
Get a Free Hot Water Heater Replacement Quote
60 seconds · no obligation
Hot Water Heater Replacement FAQs
Answer:
It depends on the type and size of the new heater, whether it is a like-for-like swap or a change from electric to gas or to instant, and how easy the old one is to get out. You get one fixed price for the new system installed before any work starts, and nothing is charged until you say yes. The hot water system replacement cost guide shows what moves the price by system type.
Answer:
No. In NSW the water connections are licensed plumbing work, gas units need a licensed gasfitter, and the power to an electric tank needs someone licensed for electrical work. Most manufacturers also need a licensed install for the warranty to apply.
Answer:
Water leaking from the tank itself, rust at the base, rusty or discoloured hot water, and an older system that keeps breaking down are the usual signs. A faulty valve or thermostat on a younger unit can often be repaired instead, and we tell you which on the spot.
Answer:
A like-for-like swap is usually done in a few hours. Changing from electric to gas, moving the heater or running new pipework takes longer, and we tell you how long before we start.
Answer:
Most storage tanks last around 8 to 12 years, depending on water quality and how the tank has been looked after. A tank past that age that starts leaking or losing heat is usually worth replacing rather than repairing.
Answer:
A like-for-like swap is the quickest and simplest. If you keep running out of hot water, or want to change to gas or to instant hot water, the replacement is the time to do it, and we price each option so you can compare.
Answer:
Yes. The old heater is drained, disconnected and taken away as part of the replacement.
Answer:
Often, yes. Same-day replacement is what we aim for when the right heater is available, and if it has to be ordered we tell you when it will arrive before you book.
Guides That Answer the Question First
Written by our licensed team from real Sydney jobs: what it usually costs, what to check yourself, and when to call. Every price is a published market range, never a sales pitch.
Hot Water System Prices Sydney 2026
Market ranges by system type, a calculator, and repair or replace.
Read the guideNo Hot Water? What to Check First
Five checks that find the cause in ten minutes, system by system.
Hot Water System Leaking
Where the water comes from tells you if it is a valve, a fitting or the tank.
Tempering Valve Explained
Why the tank stores at 60 degrees and the bathroom gets 50, and when it fails.
All our guides are on the Mr Splash blog.
Recent Hot Water Heater Replacement Jobs Across Sydney
Suburbs where we have recently replaced or worked on hot water systems.
Upfront fixed pricing quoted before any work starts. Terms and conditions apply.
