Hot Water Systems Alexandra Hills
Gas, electric and heat pump units repaired or replaced, plus what to check about your household and your block before you choose.

Sizing and siting for the Alexandra Hills household you have now
A failed hot water system can push you toward the same tank again, in a hurry. Before that happens in an Alexandra Hills home, two questions are worth a few minutes: is the heater really at fault, and does that tank still suit the people living there? Jim Monger Plumbing and Gas repairs and replaces gas, electric and heat pump units, and gives free quotes to owners, landlords and property managers. Read on for what to check in your household and on your block, then ring us with those details when you want a quote.
Start with the people, not the old label on the tank. Four things can change the answer on this page: who lives in the house now, what the monthly budget can carry, where an outdoor unit can sit, and whether the fault is in the heater at all.
Alexandra Hills was one of Redland’s later postwar urban areas, its development spurred by the completion of Finucane Road and starting with the Vienna Woods estate. The census count rose from 5,610 people in 1981 to 17,256 in 2001. Many homes here have probably seen decades of plumbing changes, but that history dates no single tank, so go by the label at your own address.
Across Alexandra Hills, bedroom count can be a poor guide to household size. At the 2021 Census only 7.3% of homes here had one or two bedrooms, yet 1,111 households, or 19%, were one person. Those figures suggest many people living alone here are in three bedrooms or more, so count who lives in the house today before the old tank size is repeated.
Family homes carry the opposite risk, because 78.6% of households here were families in 2021 and about 19.4% of residents were then under 15. A tank that coped with bath time may now face teenage showers, so think about the years ahead.
With 47.4% of Alexandra Hills homes under a mortgage in 2021, against 34.4% across Queensland, and median repayments of $1,820 a month, a lower price today and lower power bills later may pull against each other. Your Home’s trade-off for a heat pump is around a third of the energy of electric storage for a higher purchase price. When comparing quotes, ask for purchase price and running cost side by side.
The suburb sits inland between Cleveland and Capalaba, away from the Moreton Bay beaches, so homes here have no bay frontage, but the chosen model’s own siting conditions still need checking. Tarradarrapin Creek starts in Alexandra Hills, Coolnwynpin Creek runs through it and the Hilliards Creek lower catchment covers its edges. If your back fence meets the Tarradarrapin or Coolnwynpin corridor, the rear of the block may sit lower, so check Council’s flood mapping for your address before an outdoor unit goes there. The side has its own catch: at the 2021 Census 93.3% of homes here were separate houses, so a side wall can mean a neighbour’s fence, and Energex says a heat pump can be about as noisy as a medium-sized air conditioner.
Council reported a burst main at Finucane Road and Cambridge Drive in March 2022, with water off for nearby residents and the shopping centre, so cold taps stopping too can point to the street, not the heater. That is one dated notice, not a pattern, so check for a Council notice or ring Council before paying for a callout.
Short tanks, cold taps, warranties, gas and rentals: what to check
Out of hot water by the last shower
Alexandra Hills households averaged 2.7 people in 2021 against 2.5 across Queensland, and 43.5% of families were couples with children, so several showers can land at the same time of day. Energex lists simply running out among the common reasons for lost hot water, so an empty tank can be mistaken for a dead one. Before paying for a bigger unit, note who showers when and how long the hot water lasts, and bring that to the call. We repair and replace gas, electric and heat pump units.
Cold water from a tank that seems fine
Energex also lists a system not filling properly, a faulty thermostat and a fault with the receiver in the meter box. A receiver fault on an economy tariff may be a network matter, and a new heater would not fix it. Energex takes network fault calls on 13 62 62. If the fault is in the system itself, call us to look at repair before replacement.
Discoloured water at the taps
Council says discoloured tap water can come from a nearby burst, mains maintenance or corrosion of home plumbing. Brown water does not automatically mean a failed tank, and paying for a new one would not clear a mains issue. Council’s advice is to run the outside tap nearest the water meter until it clears, avoid the washing machine and dishwasher meanwhile, and call 07 3829 8999 if it does not clear. If only the hot side stays discoloured after that, it is worth having us check the system.
Heat pump warranty and water chemistry
Most of Alexandra Hills is in Council’s Alexandra Hills Reservoir zone, with a small part in the Heinemann Road zone. Council’s 2024-25 samples gave a Langelier Index averaging -0.91 in the first and -1.06 in the second, with lows of -1.35 and -1.55. Rheem’s datasheet for one heat pump model says its warranty may not apply on water with a saturation index below -1.0. Zone samples are not a reading from your tap, and those two indexes may not be the same measure, so these figures do not make any warranty safe. Before you commit to a model, read the water conditions in its current owner’s guide and ask the installer how they apply at your address.
Choosing gas before checking supply
Not all areas have natural gas networks, so supply has to be checked for the specific property. That check can decide which gas unit is possible at your address. APA’s Customer Connections Line on 1300 001 001 is the place to ask before you settle on gas. We handle gas fitting and appliance connections under gas licence L90908.
A rental with no hot water
About one in five homes here, 1,281 in 2021, was rented, so the person without hot water may not be the person signing off the job. A replacement can trigger upgrades to current standard, including a temperature control device, correct lagging and overflow termination, so the owner needs that in view before saying yes. Ask for a free quote for the address, then pass it to whoever signs off the work before anyone says yes.
Our hot water services in Alexandra Hills
Hot water repairs
Repairs to gas, electric and heat pump hot water units.
Hot water replacements
Replacements and new installations across gas, electric and heat pump units. Installing, replacing or removing a water heater in an existing building is notifiable work, registered with the QBCC on a Form 4. In a suburb where one person may be living in a three-bedroom home, tell us who the tank has to serve today, not what it served when it went in.
Electric hot water systems
Electric hot water units repaired and replaced.
Gas hot water systems
Gas hot water units repaired and replaced, with gas fitting and connections under gas licence L90908.
Heat pump hot water systems
Heat pump units installed, repaired and replaced. Queensland requires anyone installing a solar or heat pump system to hold a QBCC solar and heat pump endorsement, and any customer can ask an installer to show it on the back of their licence card. If your block falls toward Tarradarrapin or Coolnwynpin Creek, mention it before a spot is chosen for the outdoor unit.
Thermostatic mixing valves
Valve installation, testing and yearly maintenance. In Queensland stored hot water must reach at least 60 C, and a temperature control device limits delivery to taps to 50 C on new and replacement systems.

Why choose Jim Monger Plumbing and Gas
Jim Monger Plumbing and Gas is a family-run plumber and gasfitter serving Redlands, Logan and south-east Brisbane, and a member of the Master Plumbers Association of Queensland. We hold QBCC plumbing licence 15504687 and gas licence L90908. Our base is at 3 Jordan Dr, Victoria Point. On Google the business rated 4.9 from 100 reviews as of 28 October 2026, a figure that covers all our work across the area. Google reviews are general reputation rather than a record of any one suburb. One 2025 reviewer wrote, "I was told honestly what I really needed to do," after expecting to buy a new system. Another described Jeremy as "very prompt to provide his quote". Repeat customers mention hot water work alongside other jobs, including a laundry and a bathroom and kitchen renovation.
When you ring, it helps to have three things ready: how many people live in the home now, the type and size on the old unit’s label, and whether the block backs onto a creek corridor. We give free quotes and take emergency calls 24/7.
Frequently asked questions
Can’t see your question? Call us and we’ll talk it through.
Call 0418 871 269How much hot water does one person in a three-bedroom Alexandra Hills home use, compared with a family?
Your Home says one person typically uses about 50 litres of hot water a day, so a family of four starts at roughly 200 litres before habits are counted. It also says electric storage heaters under 250 litres usually use peak electricity, while larger ones are generally connected to off-peak tariffs where available. Going up or down a size can therefore change how the power is paid for, so weigh the two together, and note that these are daily use figures, not a tank size.
Is a heat pump realistic in this part of the Redlands?
Energex says heat pumps work much better in warmer climates and can often fit the old electric unit’s space. The closed Redlands HRS weather station averaged a July minimum of 8.2 C over 1953 to 2008, and individual cold nights run lower. That makes one worth considering here alongside electric and gas, once siting and running cost are worked through.
Do I need a water softener on Alexandra Hills town water?
Council’s 2024-25 samples for the main reservoir zone averaged total hardness of 107 mg/L against an aesthetic value of 200, and dissolved solids of 222 mg/L against 600. Those figures give no reason on their own to buy a softener for a hot water system. They are zone samples rather than a test of your tap, so tell us if you see something different at home.
Which electricity tariff should a new tank go on?
Energex lists one economy tariff with supply of 8 or more hours around 10pm to 7am, and another with 16 or more hours usually outside 4pm to 9pm, and the times vary by location. Energex also says a system on an economy tariff must be suitably sized, hardwired on a dedicated circuit and arranged through a licensed electrician. Decide tank size and tariff together, because the tariff sets when the tank can reheat after a heavy evening.
Can someone get to my Alexandra Hills home today?
We take emergency calls 24/7, but taking a call is not a promise of attendance or of a same-day replacement, so ask when you ring. One Google reviewer with a faulty gas system had it largely diagnosed over the phone, and nobody could come out that day.
How often should a hot water system be serviced?
The QBCC says hot water systems are generally recommended to be serviced every five years, following the manufacturer’s instructions. If you rent the home out or have just bought it and the history is unknown, ask us to include a service when we look at the unit.
Sources
- ABS 2021 Census QuickStats: Alexandra Hills
- Redland City Council: Catchment areas of the Redlands
- Redland City Council: Drinking Water Service Annual Report 2024-2025
- Redlands Coast Today (Redland City Council): Traffic disruption at Alexandra Hills, 3 March 2022
- Australian Government Your Home: Hot water systems (archived copy of 1 December 2025)
Hot water in nearby areas
Not listed? We probably still cover your area, so give us a call.
Related services
More ways we can help around your home or business.
Guides
What to check yourself first, and when it needs a plumber. All guides
Hot water out, or a unit to replace? Call 0418 871 269.
Free quotes, and emergency callouts 24 hours a day.
