Heat Pump Hot Water Systems: Installation, Repairs and Servicing
Heat pumps are becoming one of the most popular hot water solutions across Australia. Known for their energy efficiency and long-term savings, they use advanced technology to heat water while consuming far less electricity than traditional systems.
At SGT Plumbing, we supply, install, repair and maintain heat pump hot water systems. Whether you are upgrading from an electric system, replacing an old unit or need repairs to keep your existing heat pump running efficiently, our team provides reliable, professional service.
How Heat Pumps Work
A heat pump works differently from conventional hot water systems. Instead of directly heating water with electricity or gas, it extracts heat from the air and transfers it into the water tank.
The process is similar to how an air conditioner works, but in reverse:
- The system draws in air and passes it over a refrigerant.
- The refrigerant absorbs heat and turns into a gas.
- A compressor increases the gas temperature.
- The heat is transferred into the water stored in the tank.
Because heat pumps use ambient air temperature rather than relying solely on power, they are significantly more energy efficient than traditional hot water systems.
Benefits of Heat Pump Hot Water Systems
Heat pumps are a smart investment for both homes and businesses. Their main benefits include:
- Energy efficiency – They use up to 65–75% less electricity than standard electric systems.
- Lower running costs – Reduced energy use means cheaper electricity bills.
- Environmentally friendly – Heat pumps produce fewer greenhouse gas emissions.
- Government rebates – In many cases, rebates or incentives may apply to reduce installation costs.
Reliable performance – They work effectively in a wide range of climates and conditions.
Heat Pump Installation
When it comes to hot water, correct installation makes all the difference. A poorly installed heat pump can waste energy, underperform and fail prematurely.
Our plumbers handle the full installation process:
- Removing old hot water units if required
- Correctly positioning the heat pump for airflow and efficiency
- Connecting pipework and electrical components
- Testing and commissioning the system for proper operation
We ensure every system is installed to manufacturer specifications and Australian standards for safety and efficiency.
Heat Pump Repairs
Like any appliance, heat pumps can develop faults over time. Common problems include:
- Unusual noises from the compressor or fan
- Water not heating properly
- Leaks from connections or valves
- Icing on the evaporator coil
- Reduced efficiency or longer heating times
At SGT Plumbing, we diagnose and repair all types of heat pump issues. Our goal is to restore performance quickly and extend the life of your system. Where repairs are not cost-effective, we provide clear advice on replacement options.
Heat Pump Servicing and Maintenance
Regular servicing is the best way to ensure your heat pump operates at peak efficiency and lasts for years. A typical service may include:
- Checking and cleaning the evaporator coil
- Inspecting the fan and compressor
- Testing water temperature and thermostat operation
- Checking for leaks or worn seals
- Flushing the tank if required
Scheduled maintenance reduces breakdowns, lowers running costs and protects your investment.
Choosing the Right Heat Pump
There are several types of heat pump hot water systems, and choosing the right one depends on your property size, water usage and budget. Key considerations include:
- System size – A larger household will need a bigger tank to meet daily hot water needs.
- Energy efficiency rating – Higher ratings generally mean greater long-term savings.
- Noise levels – Some units are quieter than others, important if installed close to living areas.
- Warranty and support – Quality systems come with strong manufacturer warranties.
We guide you through the selection process to ensure you choose a system that suits your home or business and provides reliable performance for years to come.
- System size – A larger household will need a bigger tank to meet daily hot water needs.
Heat Pumps vs Other Hot Water Systems
Electric storage – Heat pumps use far less electricity and are cheaper to run.
Gas storage – Gas systems can be cheaper upfront, but running costs are often higher.
Solar hot water – Solar works well but depends on roof space and sunlight. Heat pumps are effective in more locations and conditions.
For many property owners, heat pumps offer the best balance of efficiency, cost and practicality.
Why Choose SGT Plumbing for Heat Pumps
- Expert knowledge – We understand heat pump technology and how to get the best results.
- Rebate Paperwork Expertise – We know the ins and outs of Solar Victoria, VEU, and STC rebates. Our team takes care of the forms and submissions so you maximise savings with zero hassle.
- End-to-end service – From supply and installation to maintenance and repairs, we handle it all.
- Quality systems – We work with trusted brands and components that are built to last.
- Efficient work – Installations and repairs are carried out professionally and with minimal disruption.
- Practical advice – Straightforward recommendations based on your needs, not unnecessary upselling.
A heat pump hot water system uses heat from the surrounding air to warm your water, working like a reverse fridge. It’s highly energy-efficient and can reduce your hot water energy use by up to 70–80% compared to traditional electric systems.
- Lower running costs – big savings on your power bills
- Environmentally friendly – lower greenhouse gas emissions
- Rebate eligible – generous government incentives available
- Reliable – works year-round, even in cooler Victorian winters
Yes! In Victoria, you may be eligible for:
- STC (Small-Scale Technology Certificates)
- VEU (Victorian Energy Upgrades) incentives
- Solar Victoria’s Hot Water Rebate (up to $1,000)
SGT Plumbing works with authorised rebate partners and can guide you through the application process.
Yes. Modern heat pump systems are designed to perform efficiently even in cold climates like the Mornington Peninsula. Some models have a backup heating element to ensure you always have hot water.
Before calling a plumber:
- Check the power supply hasn’t tripped.
- Look at the controller for error codes (take a photo).
- Listen for the fan or compressor running when heating.
If these checks don’t fix the issue, call us for a prompt diagnosis.
We recommend servicing every 2 years, which includes:
- Cleaning the fan and filters
- Checking the pressure relief valve
- Inspecting plumbing and electrical connections
- Testing system efficiency
Most homes are suitable, provided there’s:
- Adequate outdoor ventilation
- Access to plumbing and electrical supply
- Space for the tank and compressor unit
We’ll assess your property and recommend the best system for your household.
We install Smart Power Tech (SPT), Reclaim, iStore, and other trusted brands, chosen for their performance, reliability, and strong manufacturer support.
Heat Pump Hot Water Rebates in Victoria
Switching to a heat pump hot water system doesn’t just save on energy bills — you may also be eligible for generous government rebates that can significantly reduce upfront installation costs. At SGT Plumbing, we make the process simple by handling the paperwork and ensuring you claim every rebate you’re entitled to.
Here are the three main rebates available to Victorian households:
- STCs – Small-Scale Technology Certificates STCs are a federal incentive available across Australia. Each certificate represents renewable energy generated by your heat pump. These certificates can be traded for cash or used as a point-of-sale discount at installation, reducing your out-of-pocket expense straight away. SGT Plumbing handles the hassle and offers this rebate as a point-of-sale discount at installation
- VEECs – Victorian Energy Efficiency Certificates Under the Victorian Energy Upgrades (VEU) program, households can receive VEEC rebates when replacing an older, less efficient hot water system with a heat pump. Each VEEC represents one tonne of carbon dioxide emissions avoided. The more efficient the upgrade, the higher the rebate benefit. SGT Plumbing handles the hassle and offers this rebate as a point-of-sale discount at installation
- Solar Victoria Hot Water Rebate The Solar Victoria rebate offers up to $1,000 (50% of system cost) for eligible households upgrading to a solar hot water or heat pump system. To qualify, you’ll need to meet these criteria: Combined household taxable income under $210,000 per year Property value under $3 million No previous Solar Hot Water rebate claimed at this property
SGT Plumbing is proud to be an authorised Solar Victoria Retailer & Installer, meaning we can install eligible systems and help you access this rebate.
Check our listing on the Solar Victoria Hot Water Retailer Register (scroll to “S” for SGT Plumbing).
With our rebate paperwork expertise, SGT Plumbing ensures you don’t miss out on savings. From STCs to VEECs and Solar Victoria rebates, we’ll guide you through the process and handle the paperwork, so all you need to do is enjoy your new, energy-efficient hot water system.