Gas Hot Water Installation Sydney - Storage Tanks and Continuous Flow
Old tank leaking, or ready to swap it for continuous flow? Our licensed plumbers and gas fitters supply, install and test your new gas hot water system, with the price agreed before any work starts.
- $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.
Get a Free Online Quote
60 seconds · no obligation
The Gas Hot Water Installations We Do
From a like-for-like tank swap to a new continuous flow unit on the wall, priced before any work starts.
Gas Storage Tank Replacements
An old gas storage tank that is rusting, leaking or running out of hot water, swapped for a new one in the same spot.
Continuous Flow Replacements
A tired continuous flow unit on the wall that runs hot and cold or keeps throwing codes, replaced with a new one.
Swapping Tanks For Continuous Flow
Moving from a storage tank to a continuous flow unit that heats water as you use it, instead of a tank that runs out.
Bigger Units For Busy Households
More people in the house than the old system was sized for? We work out how many showers and taps run at once, then fit a unit to suit.
Indoor Units And Flues
A gas unit inside the laundry or a cupboard replaced, with the flue fitted so the fumes go outside, not into the house.
How Bad Is Your Gas Hot Water Problem?
Three signs your gas hot water needs attention, from most to least urgent, and what to do about each.
Gas Smell Near The Unit
Turn the gas off at the meter if it is safe to, open doors and windows, and do not use switches or flames. Then call us once you are outside: our gas leak detection finds the leak and makes it safe.
Leaking From The Bottom
Water pooling under a gas storage tank usually means the tank has rusted through, and a tank cannot be patched. Turn off the cold water valve and the gas at the unit, then get a fixed quote to replace it.
Slow To Heat Or Showing A Code
Water that takes ages to warm up, runs hot and cold, or a code on the display means something in the unit needs looking at. Some faults can be repaired, but if the unit is old, plan the replacement before it stops.
How We Install Your Gas Hot Water System
Gas hot water installation Sydney wide: the right unit for your home, one fixed price, then fitted and tested by a licensed gas fitter.
Licensed gas fittersCheck The Old Unit And Gas Supply
We look at the old unit, the gas meter, the pipe sizes and where the new unit can go, including whether it needs a new gas line. Then we help you choose between storage and continuous flow.
Fixed price firstAgree One Fixed Price
You get one price for the new unit, taking out the old one, any pipe changes and the connection, before any work starts.
Tested before we leaveFit It, Test It, Show You
We connect the gas and water, check every joint for leaks, fire the unit up and run hot water at your taps before we leave.
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
Hot Water Back. Price Agreed First.
Tell us what hot water system you have now and a licensed plumber will call you straight back with a time and a fixed price.
- Fixed Price QuotesOnce we have seen the old unit and the gas supply, you get one price for the new system, taking out the old one and the connection. It holds even if the old valves turn out to be seized.
- No Call-Out Fee*Getting a licensed plumber out to look at your old hot water system and measure up costs you nothing during business hours. Nothing is charged for the installation until you have said yes to the price.
- Pay Later At 0%Hot water systems rarely give out when it suits the budget. Spread the fixed price over a 0% interest payment plan and get hot showers back now, not after payday.
*Terms and conditions apply.
Get a Free Gas Hot Water Installation Quote
60 seconds · no obligation
Gas Hot Water Installation FAQs
Answer:
It depends on the type and size of the unit, whether it goes in the same spot or needs new gas, water or flue work, and how easy it is to reach. A like-for-like swap in the same spot is usually the simplest job. We look at your old system first, then give you one fixed price covering the new unit, taking out the old one and the connection, before any work starts. There is nothing to pay just for us to come and look during business hours. Current Sydney market ranges for gas storage, continuous flow and the other system types are in our hot water system prices guide.
Answer:
No. Gas work in NSW must be done by a licensed gasfitter, and connecting the water is licensed plumbing work too. Our licensed plumbers and gas fitters do both, and test the gas connection for leaks before the unit is turned on.
Answer:
A storage tank keeps a set amount of water hot and can run out when several showers run back to back. A continuous flow unit heats water as you use it, but it needs a gas supply and gas pipe big enough to feed it. We check your meter, your pipes and how your household uses hot water, then tell you which suits.
Answer:
Yes. We take out the old tank, change the gas and water pipes to suit and mount the new unit on the wall. If the existing gas pipe is too small for the new unit, upgrading it is included in the fixed price you approve before we start.
Answer:
Yes, where the house has a gas supply that can feed a hot water unit. If the gas meter is on the other side of the house, we run a new gas line to where the unit will go, and that is part of the fixed price you agree to before any work starts.
Answer:
We service all the major hot water brands, including Rheem, Rinnai, Bosch, Dux, Thermann and Vulcan, and install both storage and continuous flow models. If you already have a model in mind, tell us when you book and it goes into your fixed price.
Answer:
A like-for-like swap in the same spot is the quickest kind of job. Changing from a tank to continuous flow, moving the unit or running new gas pipe takes longer, and we tell you how long before work starts. If you have no hot water at all, we aim to install the new system the same day where we can.
Answer:
Water coming from the bottom of a gas storage tank usually means the inner tank has rusted through, which cannot be repaired. A little water from the relief valve pipe while the tank heats can be normal, but a steady flow is not. If the tank is leaking, turn off the cold water valve and the gas at the unit, then book a replacement quote.
Answer:
Turn the gas off at the meter if it is safe to do so, open doors and windows, and do not use light switches or anything with a flame. Call us once you are outside, and we will find the leak and make it safe before the unit is used again.
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 Gas Hot Water Installation Jobs Across Sydney
Suburbs where our plumbers have replaced gas storage tanks and fitted new continuous flow units.
Upfront fixed pricing quoted before any work starts. Terms and conditions apply.
