Hot water repairs and replacement in Craigieburn
Repair or replace a Craigieburn hot water system: gas, electric and heat pump options compared, the 2027 Victorian gas rule, rebates and published price ranges.
When a hot water system stops working, the first question is whether it can be repaired. A failed thermostat, element, pilot assembly or valve can usually be replaced. A tank that is leaking from the cylinder itself cannot, and the system has to be replaced. Gas is off the table for that replacement from 1 March 2027: in an existing Victorian home, a gas water heater that can no longer be repaired has to give way to an electric system, such as a heat pump.
This site passes your enquiry to an independent licensed plumber. The plumber who takes it on gives the quote, supplies the unit and installs it.
Repair or replace?
| What you notice | Probable cause | Usual result |
|---|---|---|
| Gas tank gives no hot water | The pilot has gone out, or the thermocouple or gas valve has failed | A repair is often possible |
| Electric tank gives no hot water | Failed element or thermostat, or a tripped circuit | Often fixed; an electrician may be needed for the power side |
| Relief valve drain keeps dripping | A worn valve, or mains pressure set too high | Repair |
| A pool forms under the tank | Corrosion has gone through the cylinder | New unit |
| Water only ever lukewarm | Thermostat, tempering valve, or a unit too small for the house | Depends on its age and size |
| Brown or rusty hot water | Anode spent and the tank corroding | New unit if the tank is old |
A plumber will want the brand, model and age of the unit (the compliance plate on the side usually shows it), whether it runs on gas or electricity, and photos of the unit and the area around it. Tell them how many people live in the house, because that decides the size of any replacement.
Gas, electric or heat pump
| Type | How it heats | Points to weigh |
|---|---|---|
| Electric storage | Element heats a tank, often on off-peak power | Cheapest to buy, dearest to run on a normal tariff |
| Gas storage | Burner under the tank | Off the list for new installs in existing homes from 1 March 2027 |
| Gas continuous flow | Heats water on demand as it flows through | Same 2027 rule as gas storage; needs adequate gas supply |
| Heat pump | Draws heat from the air into the water, like a fridge in reverse | Higher purchase price, low running cost, rebates available |
| Solar with electric boost | Roof collectors with an electric backup | Needs roof space and good sun |
The Victorian Government’s page on electrification rules for existing homes says that in existing homes, gas hot water systems can no longer go in from 1 March 2027, and a failed unit that is beyond repair has to be swapped for an electric alternative. Existing gas units can still be used, maintained and repaired. Gas heating and gas cooktops are not affected. The same page says a heat pump installer should consider clearances, ventilation, noise, maintenance and access, and that frost protection is worth considering in cooler areas.
On a tight estate block where the unit sits in a narrow side path, noise and clearance are the practical issues. A heat pump compressor runs while it heats, so placing it under a neighbour’s bedroom window is a poor choice.
Rebates and discounts
Solar Victoria’s hot water rebate applies to eligible heat pump and solar hot water systems. On the program page checked on 23 October 2026, the household had to be an owner-occupier of an existing home, with combined taxable income of the owners under the stated cap, a property value under the stated limit, and an old system at least three years old. A locally made product attracts a higher rebate. The rebate is processed through an authorised retailer, and an emergency replacement can go ahead before eligibility is confirmed as long as you apply soon after. Victorian Energy Upgrades discounts can be combined with it. Check both pages for current amounts on the day you buy.
What replacement costs
An independent Melbourne price table lists these supplied and installed ranges:
| System | Installed price range |
|---|---|
| Electric storage | $840 to $3,150 |
| Gas storage | $1,250 to $3,675 |
| Heat pump | $3,150 to $6,300 |
These ranges are before any rebate. Moving the unit to a new spot, adding a new electrical circuit, a new concrete base, or upgrading the gas meter for a large continuous flow unit all add cost. The cost guide for Craigieburn plumbing lists the other line items a quote should show.
The rules that apply
Replacing a gas water heater is Type A gas appliance work, which needs a compliance certificate from a licensed plumber whatever the price, according to the BPC compliance certificate page. Replacing an electric unit needs one once the total value, including the unit, passes the threshold set on that page. A compliance certificate also confirms the work is covered by the plumber’s mandatory insurance for six years.
A split heat pump with a separate outdoor unit involves refrigeration pipework, so the installer needs the right refrigerated air-conditioning class or its restricted split heat pump class. The Plumbing Regulations 2018 carry the electrification requirement for existing homes, and the installation itself must meet the Plumbing Code of Australia, which is Volume Three of the NCC.
What a careful installer checks
The BPC listed common faults found in its 2026 audits of plumbing work. Two concern hot water: bathroom outlets running hotter than the 50°C cap where tempering is required, and relief valve drains that discharge in the wrong place. A careful installer will:
- fit or check the tempering valve so bathroom outlets cannot scald
- run the relief and tray drains to an approved discharge point
- check mains pressure and fit a pressure limiting valve if needed
- leave the old unit’s gas line capped and tested when converting to electric
- issue the compliance certificate and register the warranty
Walk away from anyone who suggests disconnecting the tempering valve to get hotter water, or offers to install a gas unit after the 2027 change.
Local angle
Craigieburn’s population roughly doubled between the 2001 and 2011 censuses and doubled again by 2021, so a large share of its houses are now old enough for their original hot water unit to fail. Rental homes make up a large share of the suburb; Consumer Affairs Victoria treats a failed hot water appliance supplied with a rental as an urgent repair. Owners in newer Mickleham estates face the same first-replacement timing.
What to do next
If the tank is leaking, turn off the cold water isolation valve at the unit and switch off the power or gas to it. Then request hot water quotes with the model plate photo, fuel type and household size. If the problem is a gas appliance more broadly, the gas fitting guide covers servicing and connections.
Frequently asked questions
- Can I keep fixing a gas water heater after 1 March 2027?
Yes. The Victorian rule only applies at replacement. An existing gas unit can still be serviced and repaired; the new unit has to be electric only once the old one is beyond repair or you decide to replace it.
- How long does it take to swap a hot water unit?
Replacing a storage unit with the same type in an easy-to-reach spot is often finished within a day. Changing from gas to a heat pump can run longer, since the gas line needs capping and an electrician may have to add a power circuit.
- Do I qualify for the Solar Homes hot water rebate as a landlord?
The Solar Homes hot water rebate is set up for owner-occupiers of existing homes who meet income and property-value tests. Rental providers should check Solar Victoria's current program pages and the Victorian Energy Upgrades discounts, which have different rules.
- What size hot water system does a family need?
It depends on the number of people, how many showers run at once and the type of system. Give the plumber your household size and morning routine, and ask them to size the unit for peak demand rather than average use.
- Is the water from my relief valve dripping a fault?
A small discharge while the water heats can be normal. A constant flow usually means the valve is worn or the mains pressure is too high. Either way it should be checked, because a failed valve is a safety device that is not working.