Mackay specifics for hot water
Colour at the tap
Mackay Regional Council puts blue or green water down to copper pipe corrosion, which it says is common in new homes. Brown water comes from maintenance work or pipe corrosion. If it only shows at the hot taps, mention that to the plumber.
No published hardness figure
Council's testing page grades water by hardness: under 60 mg/L soft but possibly corrosive, 60 to 200 good quality, 200 to 500 rising scaling. We found no figure for Mackay's own supply, so ask the plumber what they see inside old tanks.
Winter sun is lower
The Mackay M.O station averages 20.8 MJ per square metre of solar exposure a day over the year, but 14.7 in June (1990 to 2026). The July mean minimum is 13.2°C, with 0.0 days a year at 2°C or below.
Mostly owner-run houses
At the 2021 Census, 84.7% of occupied homes in the Mackay council area were separate houses and 28.6% were rented. If yours is one of the rentals, tell the landlord or agent before booking.
Queensland's replacement rules, briefly
Temperature control device. It's required on all new and replacement systems in Queensland, including a like-for-like swap. See tempering valves.
Temperatures. Water has to be heated to at least 60°C so Legionella can't grow, and delivered at no more than 50°C at the taps under the state's guidance. Queensland Health says thermostat adjustments are for a licensed electrician.
Installer. Solar and heat pump systems need a hot water installer with the QBCC solar and heat pump endorsement. Check it on the QBCC register before signing.
Signs it's time to call a hot water plumber
- Water pooling under the tank, or rust at its base.
- The relief valve dripping all the time, not just now and then.
- Hot water that runs out much sooner than it used to.
- Rumbling or banging from the tank as it heats.
- Your myh2o account flagging higher than normal use with no change in the household.
Repair or replace in Mackay
Thermostats, elements, valves and anodes can usually be replaced. A tank that's leaking through its own wall can't. A plumber who works on hot water every week can tell you which in one visit, and whether the age of the system makes a repair poor value.
Photograph the label with the brand, model and manufacture date before they arrive. It also helps to know if you're on electric, heat pump, solar or gas, and for gas, whether it's LPG bottles or a mains supply.
Replacement options
| Ask about | Rules and certificates | |
|---|---|---|
| Electric storage | Size for the household, and where the temperature control device goes. | A licensed plumber fits it. No electric restriction appears in Queensland's guidance. |
| Heat pump | Placement, noise and access for servicing. | Endorsed installer only. Models under 425 L on the register can create STCs. |
| Solar | Performance and boosting in June, when Mackay's sun is at its lowest. | Endorsed installer only. Systems under 700 L on the register can create STCs. |
STCs and rebates
STCs (small-scale technology certificates) can lower the price of an eligible heat pump or solar system when you assign them to an agent, who gives you a discount or a delayed cash payment. They're issued until the scheme ends in 2030. Read STCs explained.
No current Queensland Government hot water rebate has been confirmed in our research, so none is covered on this page. See our Queensland rebates page.
What we would do
Get a hot water specialist to diagnose it before you start shopping, because a valve or element is a far smaller job than a new system. If it's time to replace, get one quote that lists the system, the temperature control device and any STC discount, and for solar ask what June looks like. Check the QBCC endorsement for solar or heat pump installers yourself. And if myh2o shows a jump in use, look at the hot water relief valve first.