Hot Water System Installation in Illawarra
Expert hot water system installation across Wollongong, Kiama, Shellharbour and the greater Illawarra region. Electric, gas, solar and heat pump systems supplied and installed by licensed plumbers with manufacturer warranties.
Hot water system installation (sometimes called water heater installation) involves supplying, connecting and commissioning a new hot water unit to replace a failed system or upgrade an existing one. In Illawarra, installation costs range from $1,200 for a basic electric storage unit to $5,500 for a premium solar system, fully installed. The four main types are electric storage ($1,200-$2,200), gas continuous flow ($1,800-$3,500), heat pump ($2,800-$4,500), and solar ($3,500-$5,500). Heat pumps offer the lowest running costs at approximately $200-$350 per year and are eligible for NSW government rebates of up to $1,000. A licensed plumber is legally required for all hot water installations in NSW, and gas systems also require a licensed gas fitter. Most like-for-like replacements take 3-6 hours. We also handle hot water system replacements for apartment blocks and strata properties, including centralised plant rooms and individual lot units across the Illawarra.
Hot Water Systems We Install
We supply and install all major hot water system types. Each has distinct advantages — we'll recommend the best fit for your household size, budget and energy goals.
Electric Storage Hot Water
Traditional electric hot water systems store heated water in an insulated tank. Reliable and affordable to purchase, ideal for homes without natural gas. Available in 25L to 400L capacities.
Advantages
- Lowest upfront cost
- Simple installation
- Reliable & proven technology
- No gas connection needed
Considerations
- Higher running costs
- Tank takes up space
- Can run out of hot water
Gas Continuous Flow
Instantaneous gas hot water heats water on demand as it flows through the unit. Never runs out of hot water and is highly energy-efficient. Compact wall-mounted design saves space.
Advantages
- Unlimited hot water
- Energy efficient
- Compact wall-mounted
- Lower running costs than electric
Considerations
- Requires gas connection
- Higher upfront cost
- Flow rate limits simultaneous use
Heat Pump Hot Water
Heat pumps extract warmth from the surrounding air to heat water, using up to 65% less energy than conventional electric systems. Eligible for NSW government rebates and STCs.
Advantages
- Lowest running costs
- Government rebates available
- 65% less energy than electric
- Eco-friendly
Considerations
- Higher upfront cost
- Can be noisy
- Less efficient in very cold weather
Solar Hot Water
Solar collectors on your roof heat water using free energy from the sun. Electric or gas boosted for cloudy days. The most environmentally friendly option with very low running costs.
Advantages
- Free solar energy
- Very low running costs
- Government incentives
- Lowest carbon footprint
Considerations
- Highest upfront cost
- Requires suitable roof space
- Weather dependent
How We Install Your Hot Water System
A straightforward, professional process from initial consultation through to commissioning and warranty registration.
Free Consultation & Quote
We assess your household needs, existing plumbing, available space and energy preferences. You receive a detailed written quote with no hidden costs.
System Selection & Supply
Based on our assessment, we recommend the best system for your home. We supply units from trusted Australian brands including Rheem, Rinnai, Dux, Stiebel Eltron and Chromagen.
Old System Removal
We safely disconnect and remove your old hot water unit, including responsible disposal. If asbestos flue pipes are present, we coordinate safe removal.
Professional Installation
Your new system is installed to Australian Standards, with all plumbing, gas and electrical connections completed by licensed tradespeople. Tempering valves fitted as required.
Testing & Commissioning
We test the complete system for leaks, correct pressure, temperature settings and safety compliance. We walk you through the controls and maintenance schedule.
Warranty & Aftercare
All installations come with full manufacturer warranty plus our workmanship guarantee. We register your warranty and are available for any follow-up questions.
Which Hot Water System Size Do You Need?
Choosing the right capacity ensures you never run out of hot water while avoiding unnecessary energy costs from heating water you don't use.
| Household | Electric | Gas | Heat Pump | Solar |
|---|---|---|---|---|
| 1-2 people | 25-50L storage or continuous flow | Continuous flow 20L/min | 150L heat pump | 180L solar + booster |
| 3-4 people | 250-315L storage | Continuous flow 26L/min or 170L storage | 250L heat pump | 315L solar + booster |
| 5+ people | 315-400L storage | Continuous flow 32L/min or 340L storage | 315L heat pump | 400L solar + booster |
Not sure what size you need? We perform a free on-site assessment considering your peak usage times, number of bathrooms, and water pressure to recommend the perfect system.
NSW Government Rebates on Hot Water
Upgrading to an energy-efficient hot water system can qualify you for significant government incentives. Heat pumps and solar hot water systems are eligible for Small-scale Technology Certificates (STCs) which reduce your upfront costs.
STC Rebates (Heat Pump)
Save $600 - $1,000 on purchase price
STC Rebates (Solar)
Save $800 - $1,200 on purchase price
Annual Energy Savings
Save $300 - $700 vs electric storage
System Lifespan
10-15 years for heat pumps, 15-20 for solar
10-Year Cost Comparison
Estimated total cost over 10 years for a 4-person household (purchase + installation + running costs):
*Based on average NSW electricity and gas tariffs. Actual costs vary by usage and tariff.
Trusted Brands We Install
We supply and install all major Australian hot water brands with full manufacturer warranties.
Rheem
Australia's #1 hot water brand
Rinnai
Leading gas continuous flow
Dux
Reliable Australian-made
Stiebel Eltron
Premium German heat pumps
Chromagen
Quality solar systems
Thermann
Great value range
Bosch
Compact continuous flow
Aquamax
Trusted electric & heat pump
Hot Water Installation Across Illawarra
Fast response hot water system installation throughout the Illawarra region. Emergency same-day replacements available when your hot water fails.
Hot Water Install Wollongong
CBD, North Wollongong, West Wollongong & surrounds
Hot Water Install Kiama
Kiama township, Kiama Downs, Jamberoo & hinterland
Hot Water Install Shellharbour
Shellharbour City, Shell Cove, Warilla, Barrack Heights
Hot Water Install Dapto
Dapto, West Dapto, Kanahooka, Horsley
Hot Water Install Albion Park
Albion Park, Albion Park Rail, Tongarra, Calderwood
Hot Water Install Bulli
Bulli, Thirroul, Austinmer, Coledale, Stanwell Park
Hot Water Install Corrimal
Corrimal, Tarrawanna, Bellambi, East Corrimal
Hot Water Install Figtree
Figtree, Keiraville, Gwynneville, Mangerton
No Hot Water? We Can Help Today
Lost your hot water? We offer emergency same-day replacement across Illawarra.
0411 360 263Hot Water Installation Questions
Common questions about hot water system installation in Illawarra
Request Hot Water Installation Quote
Need a new hot water system? Contact us for a free, no-obligation quote including system recommendation, installation cost and available rebates.
Contact Information
Phone
0411 360 263
[email protected]
Opening Hours
Mon-Thu: 7am-7pm | Fri-Sat: 7am-5pm
Emergency same-day installs available
Why Choose Us?
- All system types supplied & installed
- Government rebate paperwork handled
- Same-day emergency replacements
- Licensed plumber & gas fitter
- Full manufacturer warranties
- Free on-site assessments
What each system type costs, installed
Published 2026 ranges, before rebates. Sources disagree noticeably on heat pumps, so these ranges span them. Heat pumps replacing electric attract the NSW discount of up to $640 plus federal certificates on top, quoted per job because the actual amount varies.
| Job | Typical range | Expected life | What affects it |
|---|---|---|---|
| Electric storage | $1,200 – $3,450 | 8 – 12 years | Cheapest to buy, most expensive to run. Still the most common system in the Illawarra. |
| Gas storage | $1,500 – $4,025 | 10 – 15 years | Needs natural gas or LPG. Cheaper running costs than electric storage. |
| Gas continuous flow | $2,100 – $3,500 | 15 – 20 years | No tank, no running out. Good for households with unpredictable demand. |
| Heat pump | $3,300 – $6,900 | 10 – 15 years | Highest upfront, lowest running cost, and the only type attracting both NSW and federal incentives. |
| Solar hot water | $3,650 – $6,560+ | 15 – 20 years (panels), 8 – 12 (tank) | Roof-mounted or split system. Attracts STCs but not the NSW heat pump incentive. |
These are typical price ranges for the Illawarra and NSW, drawn from published 2026 industry pricing data — not a quote, and not our fixed prices. What your job actually costs depends on access, the age and condition of the plumbing, parts, and whether it is after hours. We give you a fixed price before we start work, so you are never guessing. Reviewed 23 August 2026.
Choosing between the five types
Upfront cost and running cost pull in opposite directions. What is right depends on whether you have gas, how much outdoor space you have, and what you are replacing.
| Situation | Suits you if | Think twice if |
|---|---|---|
| Electric storage | Budget is tight and the replacement is urgent | You plan to stay — running costs are the highest |
| Gas storage | You have natural gas and want lower running costs | You are on bottled LPG only |
| Gas continuous flow | Demand is unpredictable and you hate running out | No gas connection, or very low usage |
| Heat pump | Replacing electric — best incentives, lowest running cost | No outdoor space, or noise would be a problem |
| Solar | Good roof orientation and a long horizon | Shaded roof, or a heritage conservation area |
Sizing it for the household you have now
The most common mistake in a like-for-like replacement is fitting the same size again. Tanks get sized for the household a house was built for, not the one living in it. That is particularly common in family suburbs like Kiama Downs, where a lot of 1980s stock is still on its original sizing.
- 125–160 litres — one or two people
- 250 litres — three or four
- 315 litres and up — five or more
On a controlled load tariff, size up. The tank has to carry a full day because the element only runs overnight. Continuous flow systems are sized by flow rate rather than volume, so the question becomes how many outlets can run at once.
What the install actually involves
A straightforward like-for-like replacement is usually three to six hours. Changing type — electric to heat pump, or storage to continuous flow — takes longer because the connections, the base and often the location change. Gas work requires a licensed gas fitter and a compliance certificate. We hold both licences, so a hot water changeover with a gas connection is one trade and one visit rather than two.
The rebates, honestly
Replacing an electric storage system with a heat pump attracts two incentives that stack: the NSW Energy Savings Scheme, published as up to $640, and federal Small-scale Technology Certificates on top. Replacing gas rather than electric, the NSW side drops to up to $330. Treat “up to” literally, because NSW calls those figures indicative and the real discount varies with the installer, the location, the model and the complexity of the job. We calculate yours on the actual model and put it in the quote, with the mandatory $200 ex GST co-payment shown as a separate line.
Two things worth knowing. The NSW incentive is applied as a discount at the point of sale, not claimed back later. And the scheme requires a minimum customer co-payment of $200 excluding GST per unit, which means a compliant heat pump upgrade can never legitimately be advertised as free. If someone is offering you a $0 heat pump, ask how they are handling the mandatory co-payment and get the answer in writing.
Also worth knowing: the federal component shrinks every 1 January as the deeming period steps down. It will not be better next year. Full rebate detail here.
If the sums do not favour a heat pump for your situation — and replacing gas rather than electric, they often do not — we will say so rather than pushing the system with the biggest rebate attached.
Hot water installation across the Illawarra
Kiama-based, covering Helensburgh down to Berry. Local pages with pricing and area-specific detail: