Hot Water Systems Sydney: Fast, Licensed & Guaranteed
Expert hot water system installation, repair and replacement across Sydney. We supply and install all major brands: Rheem, Rinnai, Dux, Bosch, Thermann. Gas, electric, solar and heat pump systems.
Licensed & insured · Lic #306457C
Get a Free Hot Water Systems Quote
60 seconds · no obligation
The Hot Water Systems We Replace
Leaking, rusted and worn out systems swapped for the right new one, at a price agreed before any work starts.
Leaking Or Rusted Tanks
Water pooling under the tank or rust streaks down its side usually mean the inside has rusted through, and a tank that leaks from its body cannot be patched.
Old Electric Tanks
An electric tank that has given years of service but now loses pressure or runs out early, swapped like for like or for a bigger one.
Brown Or Rusty Hot Water
Yellow or brown water from the hot tap while the cold runs clear often means rust inside the tank, a sign it is close to the end.
Outdoor Tanks Down The Side
Tanks down the side passage replaced in the same spot where it works, or moved somewhere better while the new one goes in.
How Bad Is Your Old Hot Water System?
Three signs your hot water system needs replacing, from most to least urgent.
Water Leaking From The Tank
Turn off the cold water valve going into the system, switch off its power or gas, and call. A tank leaking from its body cannot be repaired, only replaced.
No Hot Water From An Old System
If the system is getting old and has broken down before, ask for a fixed price on both a repair and a new system, then decide.
Rust Marks Or Running Out
Rust around the base, brown hot water, or a household that has outgrown the tank all mean it is time to plan a replacement before it fails.
How We Replace A Hot Water System
Hot water systems Sydney wide: pick the right replacement, agree one price, then swap it and test it.
Licensed plumbersCheck The Old System
We look at the old system, the space, the gas and power supply and how much hot water the house uses, then recommend a tank or a continuous flow unit.
Fixed price firstAgree One Fixed Price
You get one price for the new system, taking out the old one and the full installation, before any work starts.
Tested before we leaveSwap It And Test It
The old system comes out, the new one goes in with new valves, and we fill it, heat it and check the hot taps before we go.
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 System Out, New One In.
Tell us what hot water system you have and what it 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 system and where the new one is going, you get one price for the whole swap. It holds even when the old tank is harder to get out than it looked.
- No Call-Out Fee*Getting a plumber out to look at the old system and measure up 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 system rarely dies at a good time to spend. Spread the fixed price over a 0% interest payment plan and get the new system in now.
*Terms and conditions apply.
Get a Free Hot Water Systems Quote
60 seconds · no obligation
Hot Water Systems FAQs
Answer:
It depends on the type and size of the new system, whether it runs on gas or electricity, and whether it goes in the same spot. We look at the old system first, then give you one fixed price that includes taking it out, to approve before any work starts. There is nothing to pay just for us to come and look during business hours. The hot water system replacement cost guide shows what moves the price by system type.
Answer:
Swapping a hot water system is licensed work in NSW: the water connection is plumbing work, a gas connection needs a licensed gas fitter, and the electrical connection is licensed electrical work. What you can safely do is turn the old one off at the cold water valve and switch off its power or gas while you wait.
Answer:
Replace it when the tank itself is leaking or badly rusted, when it keeps breaking down, or when the household has outgrown it. A faulty valve, element or thermostat on a sound tank is usually worth repairing. We tell you which on the spot, with a fixed price for either.
Answer:
A like-for-like swap in the same spot is often done the same day where we can. Changing from electric to gas, moving the system or running new pipes takes longer, and we tell you how long before we start.
Answer:
An electric tank is the simplest swap for most houses. With natural gas, a gas tank or a continuous flow unit is an option, and continuous flow heats water as you use it, so it does not run out mid-shower. Solar and heat pump systems cost more to put in but use less energy to run. We recommend one based on your household and supply.
Answer:
Yes, if there is a natural gas supply at the property. The gas line may need extending to where the new unit goes, and the old electric tank is disconnected and taken away. We price the whole change as one fixed price.
Answer:
Yes. Disconnecting and taking away the old system is part of the fixed price for a replacement.
Answer:
We work with all the major brands, including Rheem, Rinnai, Dux, Thermann, Bosch, Vulcan and Aquamax, in electric and gas storage tanks and continuous flow units.
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 Replacement Jobs Across Sydney
Suburbs where our plumbers have recently replaced leaking, rusted and worn out hot water systems.
Upfront fixed pricing quoted before any work starts. Terms and conditions apply.
