Hot water warranties in Victoria, and what to do if your system fails
Product warranty, workmanship warranty and statutory rights are three different things with three different clocks. Here is who covers what, and the order to escalate in.
Three protections run at the same time on a hot water install in Victoria. The manufacturer covers the product: typically 5 to 10 years on an enamel cylinder, 10 to 12 years on a continuous flow heat exchanger, 5 to 7 years on a heat pump compressor, and only 1 to 3 years on parts. Your installer covers the workmanship, which is 12 months with us. And Victorian law adds two more: the compliance certificate issued by a licensed plumber carries statutory insurance on the plumbing work for 10 years, and the consumer guarantees in Australian Consumer Law have no fixed expiry date at all.
What is covered, by whom, and for how long
Typical 2026 terms for domestic hot water in Victoria. Your own paperwork wins over any table, so read the warranty document that came with the unit.
| What | Who covers it | How long | What it actually pays for |
|---|---|---|---|
| Enamel storage cylinder, gas or electric | Manufacturer product warranty | 5-10 years, often pro rata after year 5 | A replacement tank. Usually not the labour to fit it. |
| Continuous flow heat exchanger | Manufacturer | 10-12 years domestic | The heat exchanger only, not the burner, fan or board. |
| Heat pump compressor and outdoor unit | Manufacturer | 5-7 years | The unit. Some brands exclude travel outside their metro service area. |
| Heat pump or solar cylinder | Manufacturer | 6-10 years enamel, up to 15 on some stainless tanks | The cylinder only. |
| Solar collectors, tubes or flat plate | Manufacturer | 10-15 years | Panels or tubes. Not the roof access, crane or re-flashing. |
| Parts: element, thermostat, valves, board, pilot assembly | Manufacturer | 1-3 years | The part. Attendance and fitting are usually yours after year one. |
| Labour on a warranty repair | Manufacturer, sometimes the installer | Commonly 12 months only | This is the gap. A tank replaced free in year six still costs $600 to $1,100 to fit. |
| Workmanship on the installation | Your installer, in writing | 12 months with us | Pipework, connections, valve set, mounting, commissioning and temperatures. |
| Statutory plumbing insurance | Insurance the licensed plumber is required to hold, triggered by the compliance certificate | 10 years from the date on the certificate | Defective plumbing work where the plumber has died, disappeared or become insolvent. It follows the property to the next owner. |
| Consumer guarantees, Australian Consumer Law | The business that sold it to you, and the manufacturer | No fixed end date. A reasonable period given the price and how it was described | Repair, replacement or refund where goods are not of acceptable quality or the service lacked due care and skill. |
| Domestic Building Insurance | Insurer, arranged by the builder, required once the contract price passes the Victorian threshold | 6 years structural, 2 years non-structural | Only where the builder has died, disappeared or become insolvent. Rarely triggered by hot water alone, but relevant inside a bathroom renovation package. |
The escalation steps, in order, with the timeframe for each
Work down this list. Skipping a step usually costs you time, because the next body along will ask whether you completed the one before it.
| Step | Who | What you do | Timeframe |
|---|---|---|---|
| 1. Make safe and notify | You, then the installer | Shut the isolating valve, and the gas at the meter if you can smell gas. Photograph everything including the data plate. Email the installer the same day with model, serial and install date. | Same day. A leaking unit should get a make-safe response same day. |
| 2. Diagnosis | Installer or the brand's service agent | Get someone to attend and state in writing whether it is a product fault, an installation fault or fair wear. | 1-2 business days for a response, 2-5 business days for a manufacturer service agent. |
| 3. Written defect notice | You | One email listing each defect, when you first noticed it, what you want done, and the date you want it done by. | Allow a reasonable period to rectify, commonly 14 days. |
| 4. Manufacturer escalation | You | Escalate past the local agent to the brand's national customer service, quoting the serial number and the failed service visit. | Allow 10 business days for a decision. |
| 5. Free conciliation | Domestic Building Dispute Resolution Victoria | Lodge the dispute. The service is free, and for domestic building work it must be used before VCAT. | Assessment then conciliation, typically weeks rather than months. |
| 6. Consumer guarantee complaint | Consumer Affairs Victoria | Use this where the argument is about the goods or the service under Australian Consumer Law rather than the building work. | Allow several weeks. |
| 7. Licensing and insurance | Victorian Building Authority | Report a licensed plumber's defective work, or claim on the statutory plumbing insurance if the plumber has died, disappeared or become insolvent. | Within 10 years of the date on the compliance certificate. |
| 8. Tribunal | VCAT, Building and Property List | Last resort, after conciliation has been attempted and closed. | Months. Treat it as the end of the road, not the start. |
Not sure which step you are at? Call 0485 813 822 and we will tell you straight, even if the original install was not ours.
Something failed and you cannot get the installer back?
We attend other people's installs across the South East and put the diagnosis in writing so you have something to escalate with.
The Victorian framework, named
Plumbing and gasfitting in Victoria sit under the Building Act and the plumbing regulations made under it, both administered by the Victorian Building Authority. The practical consequences for you are three: the person doing the work must hold the right VBA licence or registration for each class, prescribed plumbing work over the regulated dollar threshold must be certified with a compliance certificate, and licensed plumbers are required to hold insurance that covers the work for ten years from the date on that certificate. That last point is the one almost nobody knows about, and it is the reason we will not do a cash job without a certificate: the certificate is your ten year safety net, not our paperwork.
Contractual protections come from the Domestic Building Contracts Act, which sets out what a domestic building contract must contain and implies warranties into it about workmanship, materials, suitability and compliance with the law. Consumer protections come from the Australian Consumer Law: goods must be of acceptable quality and fit for purpose, and services must be carried out with due care and skill. Those guarantees exist independently of any manufacturer warranty, they cannot be signed away, and unlike a warranty they have no fixed expiry. A tank that fails at year seven on a five year warranty can still be a consumer guarantee matter if a reasonable person would expect that unit, at that price, to last longer.
Disputes about domestic building work run through Domestic Building Dispute Resolution Victoria first. It is free, it is designed to be used without a lawyer, and for domestic building work you generally have to go through it before VCAT will hear the matter. Straight consumer complaints about the goods go to Consumer Affairs Victoria. Complaints about the plumber themselves, and statutory insurance claims, go to the VBA.
What to keep, and what a defect notice should say
Keep six things in one folder, digital or paper, for the life of the system: the itemised quote, the tax invoice showing an ABN, the compliance certificate, the manufacturer's warranty document, a photo of the data plate showing model and serial number, and any service records including anode inspections. Add dated photos of the finished install. That folder is worth several hundred dollars the first time something goes wrong, and it is the first thing a buyer's conveyancer asks for when you sell.
A defect notice does not need legal language. It needs five things: the address and the install date, the model and serial number, a numbered list of each defect with the date you first noticed it, what you want done about each one, and a date by which you want it resolved. Attach the photos. Send it by email so it is timestamped, and keep it civil, because the same email will be read by a conciliator later. One page is plenty.
Defect or fair wear and tear
Not everything that goes wrong is a warranty claim, and knowing the difference saves an argument. A cylinder leaking at year three is a defect. A sacrificial anode consumed at year six is fair wear: it is a consumable that corrodes so the tank does not, and replacing it at $220 to $380 is maintenance. A PTR valve releasing a cupful of water during a heating cycle is normal thermal expansion, but a valve weeping continuously is either faulty or a sign of mains pressure over about 500 kPa, which points at a missing pressure limiting valve rather than a bad tank. Rumbling and sediment noise at year eight is maintenance. A tempering valve drifting after five years is a serviceable item. A heat pump icing up on a 3°C Berwick morning and then running a defrost cycle is doing exactly what it was designed to do.
Genuine defects look different: water at the base of the tank in the first years, a joint that has never stopped weeping, a unit that was never commissioned to temperature, a missing tempering valve, an outlet delivering water hot enough to scald, a heat pump with no condensate drain, or a flue that terminates too close to a window. Our warning signs page covers the symptoms and which are urgent.
What voids cover, and the honest note
Warranties get declined for predictable reasons: an unlicensed install, no compliance certificate, missing tempering or expansion control valves, running the tank dry after the water was turned off, setting the thermostat above the manufacturer's limit, feeding the unit from a rainwater supply without the right filtration and pressure control, or skipping an anode inspection where the manual specifically requires one at year five. None of those are gotchas invented by the manufacturer. They are the conditions printed in the book that comes in the box, and the reason we hand you that book rather than leaving it in the carton.
Two things no warranty covers. Water damage from a burst is a home insurance matter, not a warranty matter, and your insurer will ask for the compliance certificate and the plumber's licence number, which is exactly why the folder matters. That process is set out on the burst hot water insurance claim page. And a system that has simply reached the end of its life is not defective: the realistic figures are on how long hot water systems last.
The honest note. In our experience almost every dispute we get called into could have been prevented by a clear written scope before anyone started. Not a longer warranty, not tougher law: a quote that names the model and capacity, lists which valves are being replaced, states who disposes of the old unit, confirms that a compliance certificate is included, sets out the rebate path and who claims it, and puts the labour warranty term in writing next to the product warranty term. If a quote you are holding is missing any of those six lines, ask for them before you accept it. Ours has them, and if you want to compare, the pricing page shows what each line is worth and the specification guide explains what warranty length actually signals about a unit. If you are budgeting the job, the budget page shows where cutting the valve set costs you the cylinder warranty.
Warranty questions we get asked
How long is the warranty on a hot water system in Victoria?
Does a 10 year warranty mean 10 years of free repairs?
What does the compliance certificate have to do with warranty?
What is the difference between a defect and fair wear and tear?
Who do I complain to if the installer will not fix it?
What voids a hot water warranty?
Get a quote with the warranty terms written on it
Send your details and we will come back within one business day with the product warranty, the labour term and the compliance certificate all stated on the quote.
VBA-registered plumbers and gasfitters, certificate every job
Berwick, Cranbourne, Narre Warren, Hampton Park, Endeavour Hills, Officer, Beaconsfield, Pakenham and Clyde.