AquaMAX G390SS Gas Storage Water Heater
SunCity Hot Water supplies, installs and services the AquaMAX G390SS Gas Storage Water Heater across the Sunshine Coast, Brisbane, Bribie Island and Gympie — backed by our quality workmanship guarantee. Call 1300 728 122.
Upgrade to the AquaMAX G390SS Gas Storage Water Heater today and enjoy reliable, efficient hot water for your household. Contact SunCity Hot Water to find out more and schedule your installation.

Key Features
Rapid Recovery Rate
The AquaMAX G390SS features a rapid recovery rate, heating water quickly and efficiently. This ensures hot water is readily available, even during busy periods with multiple fixtures in use.
Outstanding Energy Efficiency
With a 5-star energy rating, the G390SS provides maximum efficiency without compromising performance. This helps to keep energy costs down and reduces your household's environmental impact.
Durable Stainless Steel Tank
Constructed with high-quality stainless steel, the tank is corrosion-resistant, which protects it from rust and extends its lifespan, minimising the need for frequent replacements.

Reliable Performance
With its large 390-litre capacity and rapid recovery rate, the AquaMAX G390SS delivers dependable hot water to meet the needs of larger households.

Natural Gas Efficiency
Operating on natural gas, the AquaMAX G390SS provides an economical and efficient water heating solution, often more cost-effective than electric alternatives.

Durability You Can Trust
The robust stainless steel tank offers excellent corrosion resistance, helping to minimise repairs and ensure a long service life.
Installation, Maintenance & Warranty
Installation

The AquaMAX G390SS is designed for straightforward installation, suitable for both new builds and replacements. Its compact design and clear instructions enable professional technicians at SunCity Hot Water to install the unit quickly and in accordance with all relevant safety and regulatory standards.
Maintenance

Built for durability and ease of use, the AquaMAX G390SS requires minimal maintenance. Regular maintenance checks are recommended to maintain peak performance, while the durable stainless steel tank reduces wear and tear. Our expert team is available to assist with routine servicing to keep your heater operating efficiently.
Warranty

The AquaMAX G390SS comes with a 12-year warranty on the cylinder and a 1-year warranty on parts and labour. This comprehensive warranty reflects the manufacturer’s confidence in the product’s durability and performance, providing peace of mind for your investment.
Frequently Asked Questions
How can I purchase the AquaMAX G390SS?
Contact SunCity Hot Water to learn more about the AquaMAX G390SS, obtain a quote or arrange installation. Our team is ready to assist with selecting the best hot water solution for your home.
Is the AquaMAX G390SS easy to install?
Yes, the AquaMAX G390SS is designed for easy installation. Our professional technicians can efficiently install the unit in various locations around your home.
How energy efficient is the AquaMAX G390SS?
The AquaMAX G390SS has a 5-star energy rating, offering excellent efficiency to help reduce your energy costs.
Is gas hot water cheaper than electric?
Gas hot water is often cheaper to run than peak-rate electricity, particularly for larger households. Continuous-flow gas only heats water on demand, avoiding the standby heat loss of a storage tank. Actual running costs depend on your gas rates and usage.
How does gas hot water work?
A gas hot water system burns natural gas or LPG to heat your water — either instantly as it flows through a continuous-flow (tankless) unit, or stored in a heated tank ready for use.
How long do gas hot water systems last?
Gas hot water systems typically last around 10–12 years with regular servicing. Continuous-flow units often last longer than storage models.
What size gas hot water system do I need?
Continuous-flow gas systems are sized by flow rate (litres per minute) based on how many hot water outlets run at once; gas storage systems are sized by tank capacity. SunCity will match the right unit to your household's peak demand.
How much does it cost to install a hot water system?
SunCity Hot Water quotes all-inclusive pricing — supply, installation by licensed plumbers and electricians, tempering and pressure-relief valves, removal of the old unit, QBCC fees and GST — with no hidden extras. Call 1300 728 122 for a fast quote.
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