Rheem Pronto 12L Instantaneous Gas Water Heater
SunCity Hot Water supplies, installs and services the Rheem Pronto 12L Instantaneous Gas Water Heater across the Sunshine Coast, Brisbane, Bribie Island and Gympie — backed by our quality workmanship guarantee. Call 1300 728 122.
Upgrade to the Rheem Pronto 12L Instantaneous Gas Water Heater for instant, energy-efficient hot water on demand. Contact SunCity Hot Water today for expert installation and advice tailored to your needs. Enjoy reliable hot water—take the first step now!
Key Features
Convenient Installation
The Rheem Pronto is designed to use the same mounting points and connections as the most common mechanical water heaters, making installation quick and straightforward without significant adjustments.
No Electrical Connection Needed
Featuring an inbuilt hydro-electric generator, the Rheem Pronto ignites the gas as soon as the hot water tap is turned on, eliminating the need for an electrical connection. This provides greater flexibility for installation.
Precise Electronic Temperature Control
With electronic temperature control, the Rheem Pronto allows you to accurately set and maintain your desired hot water temperature, enhancing comfort and reducing temperature fluctuations.
Simple Seasonal Adjustment
The Rheem Pronto offers easy seasonal adjustment, allowing fine-tuning of the water heater to provide optimal hot water supply throughout the year, ensuring comfortable temperatures regardless of climate.
LED Operation Monitor
Equipped with an LED monitor, the Rheem Pronto informs you about its operation and provides diagnostic support to help quickly identify and address potential issues.
Reliable Natural Gas Operation
Operating exclusively on natural gas, the Rheem Pronto provides efficient, on-demand hot water without reliance on electricity, making it a practical choice for consistent hot water supply.
Installation, Maintenance & Warranty
Installation

The Rheem Pronto 12L is designed for easy installation using common mounting points and connections found in mechanical water heaters. This means it can often be installed without significant modifications, reducing installation time and complexity.
Maintenance

Regular maintenance is recommended to ensure optimal performance and longevity of your Rheem Pronto 12L Instantaneous Gas Water Heater. Periodic checks should be conducted by a qualified technician to inspect the heat exchanger and gas components, ensuring safe and efficient operation.
Warranty
The Rheem Pronto 12L Instantaneous Gas Water Heater comes with a comprehensive warranty package. It includes a 10-year parts warranty and a 3-year labour warranty on the heat exchanger. All other components are covered by a 3-year parts and labour warranty for domestic installations. Warranty conditions apply; please refer to the official documentation for full details.
Frequently Asked Questions
Do I need an electrical connection for the Rheem Pronto?
No, the Rheem Pronto operates without an electrical connection thanks to its built-in hydro-electric generator which ignites the gas as soon as you turn on the hot water tap.
Can I easily adjust the water temperature for different seasons?
Yes, the Rheem Pronto allows simple seasonal adjustments enabling optimisation of the hot water supply throughout the year for comfortable temperatures in both warm and cool weather.
What type of gas does the Rheem Pronto use?
The Rheem Pronto 12L model is designed to operate exclusively on natural gas.
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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