Common repairs, $150–$600
Elements, thermostats, thermocouples, relief valves: the parts that actually fail, fixed in a single visit. Most no-hot-water calls land here.
Hot Water Back Today
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Cold water at 6am feels terminal, but the autopsy usually finds a $40 part, not a dead system. We test before we talk replacements, carry the common failures on the van, and put Seven Hills households back under hot showers the same day, saving the new-system quote for tanks that have honestly earned one.
- Licence 368473C, fully insured
- Gas, electric, continuous-flow & heat pump
- Diagnosis before any replacement talk
Why We Test Before We Quote In Seven Hills
Most of the no-hot-water calls we take in Seven Hills end in a repair, not a skip bin. Electric systems lose elements and thermostats; gas systems lose thermocouples and pilot assemblies; continuous-flow units throw error codes that mean a sensor or a flow problem, not a dead unit. Those are parts, they are stocked on the van, and the fix is measured in hours.
The industry default is the opposite, quote a shiny new system to anyone whose water went cold, because a replacement is worth ten times a thermostat. We diagnose first. A five-year-old tank with a failed element deserves an element. What it does not deserve is a $2,000 replacement because someone could not be bothered testing a $40 part.
A leaking tank in an apartment
A storage tank holds a lot of water, and in a block it has neighbours underneath. A slow leak that would be a nuisance in a house is a damage claim in an apartment.
Capacity complaints are usually a sizing problem rather than a fault: two showers at once, or a bath while the dishwasher runs, exceeding what the unit was specified to deliver. Worth diagnosing before replacing anything.
If yours sits in an internal cupboard, check that the safe tray beneath it drains somewhere and is not blocked with dust and lint. That tray is the only thing between a failed tank and the ceiling below, and it is almost never inspected.
Continuous flow, and why blocks are moving to it
With 84.1% of Seven Hills dwellings recorded as separate houses by the ABS 2021 Census, above the NSW figure of 65.6%, almost every system we attend is a storage tank in a garage, side passage or external alcove.
Instantaneous units suit apartments well: no stored water to fail into the building, no cylinder taking up a cupboard, and no recovery time when several people shower in sequence.
The trade-off is that they need adequate gas supply and correct flue arrangements, which in an older block is not always straightforward. It is worth establishing what the building can actually accommodate before choosing a replacement.
Is the hot water unit even yours?
In an apartment this is the first question, because it decides who arranges and pays for everything that follows. A unit inside your lot serving only your apartment is yours. A central plant serving the building, or a unit sitting on common property, is the owners corporation's.
Check your strata plan before you authorise work, not after. It is the difference between a bill you owe and one you can hand on.
Water too hot, or not hot enough
Stored water is deliberately kept at 60 degrees to suppress bacteria, then tempered down to a safe 50 at the tap. If your hot has become scalding, the tempering valve has usually failed, and that is a genuine safety issue in a house with children.
If it has become lukewarm, the same valve is a likely culprit before the heater is. Either way it is a small part, and it should be checked before anybody discusses a new system.
The anode: the part that decides how long a tank lives
Inside every storage cylinder is a sacrificial anode that corrodes so the steel does not. When it is consumed, the tank starts consuming itself, and that is the point of no return.
Replacing an anode costs a fraction of replacing a tank and roughly doubles its service life. Almost nobody does it, because almost nobody is told it exists, which is why it is here rather than in the fine print.
Repair or replace: how the decision actually goes
Three things decide it: the age of the unit, the cost of the failed part, and whether the cylinder itself is sound. A tank under about eight years old with a failed element, thermostat or valve is almost always worth repairing.
A tank that has rusted through is finished, and no part saves it. We would rather tell you that than sell a repair that buys a month, and you should expect to be shown why, not just told.
Gas, electric or heat pump in 2026
Running costs, roughly and in order: heat pump cheapest, gas continuous next, electric storage on a controlled-load tariff after that, and electric storage on a standard tariff most expensive by a wide margin.
Purchase price runs almost exactly in reverse, which is why the right answer depends on how long you intend to be in the house. We will do that arithmetic with your figures rather than recommend a category.
What it costs in Seven Hills
Major repairs, $600–$1,200
Gas valves, control boards on continuous-flow units, and bigger jobs on systems still worth the spend.
Electric storage, installed: $900–$1,600
Like-for-like replacement when the tank is done. Gas storage runs $1,200–$2,200 installed.
Continuous flow, installed: $1,400–$2,800
Endless hot water, no tank to rust, and it frees the space the cylinder occupied.
Heat pump, installed: $2,500–$5,000
After rebates. Costs the least to run of the lot, worth the numbers conversation on any replacement, not just the green one.
You see the repair number and the replacement number together, the decision is yours, made with both in hand. Figures here are indicative of the 2026 Sydney market rather than a quote from us, you get your own number as a fixed price before any work starts.
Cold Shower To Fixed
Step 01
Step 01
Describe It, We Stock It
System type, age and symptom over the phone lets us load the probable part before leaving, that is what makes same-day genuinely same-day.
Step 02
Instruments Decide
Multimeter on elements, sequence checks on gas, codes read on continuous flow. The diagnosis comes off the meter, never off a sales target.
Step 03
Repair: Or Both Numbers
Repairable means repaired now. End-of-life means the repair and replacement prices side by side, with our reasoning, then your call, unhurried.
Step 04
Installed To Spec
Replacements go in with tempering valve, relief drain and compliant connections, old unit gone, and hot water flowing: usually the same day.
That Shower Was Colder Than Expected?
Call before 10am and in most cases the water is hot again tonight. Describe the system and we bring the likely fix on the van.
Usually not. Sediment builds in the base of the tank and insulates the element, so less of the cylinder is genuinely heated. Flushing restores much of it. If flushing does not, the household has grown and the tank is now undersized rather than faulty.
Indicatively: electric storage replaced like for like $1,300-$2,200; gas continuous flow $1,800-$3,000; heat pump $3,000-$5,000 before rebate. Common repairs, element, thermostat, tempering or relief valve: usually $250-$600. Market figures for 2026, not a quote.
Age, the cost of the failed part, and whether the cylinder itself is sound. A tank under about eight years old with a failed element, thermostat or valve is almost always worth repairing. A tank that has rusted through is finished and no part saves it, we would rather say so than sell a repair that buys a month.
A storage tank holds a lot of water and in a block it has neighbours underneath. Check that the safe tray beneath it drains somewhere and is not blocked with lint and dust, that tray is the only thing between a failed tank and the ceiling below, and it is almost never inspected.
No stored water to fail into the building, no cylinder occupying a cupboard, and no recovery time when several people shower in sequence. The trade-off is gas supply and flue requirements, which in an older block is not always straightforward, worth establishing what the building can accommodate first.
A unit inside your lot serving only your apartment is yours. A central plant serving the building, or a unit on common property, is the owners corporation's. Check the strata plan before authorising work, it is the difference between a bill you owe and one you can hand on.
Get The Hot Water Back On In Seven Hills
Diagnosis first, honest numbers second, hot water third: usually all on the same day.
