Thinking of replacing your hot water system in Queensland? Here’s what to expect.

In most Queensland homes, the hot water system works in silence — until it fails. Suddenly, you’re left with cold showers, rising power bills, or worse, a leaking tank. This guide breaks down real replacement costs, system types, and what every QLD homeowner needs to know before calling a licensed plumber in Caboolture.

How much does it cost to replace a hot water system in QLD?

The average cost to replace a hot water system in QLD ranges from $1,400 to $4,500, depending on:

• The type of system (electric, gas, solar, or heat pump)
• The size/capacity (litres)
• Whether it’s internal or external
• Installation complexity
• Local council or compliance requirements

Here’s a breakdown:

System Type	Approx. Cost (Inc. Install)
Electric Storage	$1,400 – $2,200
Gas Storage	$1,600 – $2,500
Continuous Flow Gas	$1,800 – $2,800
Solar Hot Water	$3,000 – $4,500
Heat Pump	$2,500 – $4,000

Signs your hot water system needs replacing

• Water is discoloured or rusty
• Temperature fluctuations
• Leaking from tank or connections
• System is over 8–12 years old
• Power or gas bills are rising
• Household size or water usage has changed, and you keep running out

Even if your system isn’t leaking yet, running out of hot water more often than before is a strong sign your system is undersized or inefficient for your current needs.

Can you replace your hot water system yourself in QLD?

No. In Queensland, replacing a hot water system must be done by a licensed plumber. It’s regulated under the Plumbing and Drainage Act 2018, and DIY installation can void your warranty, insurance, or worse — breach safety laws.

Hot water system types and what to consider

Electric Storage: Simple, affordable, and reliable — but higher running costs.
Gas Storage or Continuous Flow: Good for large households with consistent demand.
Heat Pumps: Energy-efficient, government-rebated, but need space and airflow.
Solar Hot Water: Sustainable and long-term cost-saving. Note: These systems require an electric or gas booster unit for cloudy days or high-demand times — which many people forget when budgeting.

We’ll help you compare all system types during your quote to match performance with cost-efficiency.

Hot water system brands we install

We regularly install and service major brands, including:

• Rheem
• Rinnai
• Bosch
• Dux
• Thermann
• Stiebel Eltron

How long does hot water system replacement take?

Most like-for-like replacements are completed within one day. Upgrades (e.g., electric to solar) or internal-to-external changes may require longer for compliance and reconfiguration.

We’ll assess your home’s setup in advance and walk you through the installation timeline.

Do you need a tempering valve in QLD?

Yes. All new installations require a tempering valve by law, to limit water temperatures in bathrooms to 50°C. This is essential for family safety, especially with children or elderly residents. It’s also a compliance requirement during pre-purchase plumbing inspections and water efficiency certification.

Why choose Creek to Coast Plumbing in Caboolture?

• Fast, clean same-day service
• Local experts in electric, gas, solar and heat pump systems
• Transparent pricing and expert advice
• Fully licensed, insured and Queensland-compliant
• Servicing Caboolture, Moreton Bay, North Brisbane and surrounding suburbs

FAQs: Hot Water System Replacement in QLD

Q: Will I be without hot water for long?
A: For most replacements, we’ll have your new system running within 4–6 hours.

Q: Can I increase my tank size?
A: Yes. If your household has grown or usage increased, we’ll recommend the right tank size to avoid running out.

Q: Are there rebates for solar or heat pump systems?
A: Yes. We can help you claim STCs (Small-scale Technology Certificates) which reduce your upfront cost.

Need a new system fast?

Get in touch with our licensed team today — we’ll quote, supply and install your replacement quickly and professionally.