Hot Water Systems from $499
WHAT TYPE OF HOT WATER SYSTEM ARE YOU REPLACING?
Why customers choose Hot Water Outlet
Shop hot water systems, valves, fittings, pumps, filters, and accessories online with clear product details, competitive pricing, helpful support, and delivery to eligible Australian postcodes.
Hot Water Systems
Compare electric, heat pump, gas storage and instant gas hot water systems by price, size, energy source, recovery, household demand and replacement suitability.
A hot water system is one of the highest-use appliances in an Australian home, and the right replacement is not simply the cheapest tank with the same litre number. Electric storage, heat pumps, gas continuous flow and gas storage all heat water differently and have different sizing, energy, space and connection requirements.
Use this guide to compare the main system types, then open the dedicated electric, heat pump, gas or instant gas collections for deeper model comparisons.
Electric, Heat Pump, Gas Storage & Instant Gas Hot Water Systems
The best starting point is the energy source and system format already available at the property. Each hot water type has a different balance of purchase price, running energy, recovery, physical space and replacement complexity.
Quiet, simple storage water heaters available from compact 50L units through to 400L family tanks.
View ElectricUses a refrigeration cycle to move heat from surrounding air into stored water, reducing electricity demand under suitable conditions.
View Heat PumpsCompact continuous-flow systems sized by L/min, temperature rise and simultaneous hot-water demand.
View Instant GasCompare Natural Gas and LPG storage systems alongside the broader gas range by capacity, recovery and first-hour delivery.
View GasHow to Choose a Hot Water System
Start with the property, not the brochure. Existing energy supply, household demand, available space and connection layout usually eliminate unsuitable options quickly. After that, compare the systems that genuinely fit the site.
Check electricity, Natural Gas, LPG, rooftop solar PV and any existing controlled-load supply.
Choose storage, continuous flow or heat pump based on the site and preferred technology.
Size around showers, baths, bathrooms, simultaneous use and daily hot-water habits.
Measure dimensions, pressure, pipe locations, power, gas and installation clearances.
Then compare price, recovery, efficiency, warranty, delivery and required accessories.
What Size Hot Water System Do I Need?
Storage hot water is usually discussed in litres, while continuous-flow gas is usually compared by litres per minute. Neither number should be used by itself. Recovery rate, heating window and actual household demand can make two systems with similar headline capacity perform very differently.
For storage sizing, a practical starting guide is around 40L of hot water per person per day for light use, 50L for average use, 65L for high use and 80L for very heavy use. Long showers, baths, high-flow fixtures and multiple bathrooms can move a household well above the average.
| System | Main sizing measure | What changes the answer | Common comparison points |
|---|---|---|---|
| Electric Storage | Tank litres + element recovery | Tariff window, element kW, shower use and stored reserve. | 50L, 80L, 125L, 160L, 250L, 315L, 400L. |
| Heat Pump | Tank litres + heat-pump recovery | Ambient conditions, compressor output, boost element and schedule. | 180L–220L, 250L–280L, 300L+. |
| Instant Gas | L/min at a specified temperature rise | Incoming water temperature and simultaneous fixture flow. | 16L, 20L and 26L classes. |
| Gas Storage | Tank litres + burner recovery | Burner input, first-hour delivery and peak household demand. | 135L, 170L and high-recovery premium systems. |
If the old hot water system regularly ran out, was oversized, used a different tariff or used a different heating technology, matching the old tank size can repeat the wrong sizing decision.
Which Hot Water Systems Use the Least Energy?
Australian Government energy guidance identifies heat pump and solar hot water as high-efficiency options. Heat pumps use a refrigeration cycle to move ambient heat into the water and can use substantially less electricity than conventional electric resistance storage. Solar hot water uses direct solar heat with backup energy when required.
Conventional electric storage remains simple and widely available and can work particularly well when heating is timed around suitable electricity tariffs or rooftop solar PV. Gas systems may still be practical where a property already has a suitable gas supply and is replacing an existing gas appliance.
Electric Storage
Simple, quiet and generally lower in upfront complexity. Running cost depends heavily on element use, tariff and whether daytime solar generation can be used.
Heat Pump
Higher purchase complexity but lower electricity consumption for water heating under suitable operating conditions.
Instant Gas
Only burns gas while hot water is being drawn, with no large tank of water held hot between uses.
Gas Storage
Combines stored reserve with fast burner recovery. Running cost depends on gas price, tank losses, usage and model efficiency.
Should I Choose a Storage or Continuous-Flow Hot Water System?
Storage systems heat water and keep it ready in a tank. This includes electric storage, most heat pumps, gas storage and solar storage. Continuous-flow systems heat water as it is needed and are most commonly seen in residential gas hot water.
| Feature | Storage Hot Water | Continuous Flow |
|---|---|---|
| How capacity is described | Tank litres plus recovery. | Flow rate plus temperature rise. |
| Stored reserve | Has a finite volume of heated water ready to use. | No large stored reserve; heats while demand continues. |
| Physical space | Requires room for a storage cylinder. | Often uses a compact wall-mounted appliance. |
| Peak demand | Can draw quickly from the stored tank. | Must remain within the appliance’s instantaneous heating capacity. |
| Standby loss | Some heat is lost from stored hot water over time. | Avoids storage-tank standing heat loss. |
Compare Hot Water System Brands
Hot Water Outlet stocks established and specialist hot water brands across electric, gas and heat-pump technologies. Brand is useful for narrowing the range, but compare the exact model because tank material, element options, refrigerant, recovery, warranty and dimensions can differ significantly within one manufacturer.
Replacing a Hot Water System
When a hot water system fails, the fastest route is usually to identify exactly what is already installed before comparing alternatives. A like-for-like replacement can reduce changes, but upgrading technology or capacity may make sense when the existing system no longer suits the household.
Photograph the data plate so the existing specifications can be checked accurately.
Identify electric, heat pump, Natural Gas, LPG or solar hot water.
Record storage litres or continuous-flow L/min and whether the old unit met demand.
Measure dimensions and record hot, cold, gas, electrical and valve positions.
Decide whether to match the old system or deliberately change type, size or efficiency.
What Should I Check Before Ordering a Hot Water System?
System capacity is only one part of compatibility. Check the pressure rating, required valves, hot and cold connection positions, inlet and outlet sizes, electrical supply, gas type where applicable, approved installation location and available space.
Storage water heaters use pressure and temperature relief protection and can require additional pressure, expansion and temperature-control valves depending on the system and installation. These parts need to match the exact water heater rather than simply being selected by thread size.
Pressure Rating
Compare the new cylinder’s pressure specification with the required PTR, pressure-control and expansion components.
Connection Layout
Hot and cold connection heights and sides vary between brands and models and can affect replacement pipework.
Electrical Supply
Check element kW, plug-in versus hardwired heat pumps, controlled-load supply and any required circuit changes.
Gas Supply
Confirm Natural Gas or LPG and make sure the gas supply and pipework suit the required appliance input.
Storage Temperature & Safe Delivery
Australian Government guidance recommends storing hot water at 60°C in storage systems to help manage bacterial risk. The temperature stored in the cylinder and the temperature delivered to fixtures are separate issues. Plumbing systems can use suitable temperature-control devices where required to limit delivered water temperature.
Hot Water Systems for Solar-PV Homes
Hot water can be an effective way to use daytime rooftop-solar generation. Conventional electric storage can be scheduled to heat during the day where the electrical arrangement allows it, while many modern heat pumps include timers, WiFi or solar-friendly operating modes.
Eligible heat-pump and solar hot water systems may also create Small-scale Technology Certificates. State and territory incentives can have separate eligibility rules, so rebates should always be checked against the exact model, location and current scheme.
Hot Water System Prices
Compare current available hot water system prices, then open each product for stock, delivery, dimensions, fuel or electrical requirements and model specifications.
| Hot water system | Current price | Type | |
|---|---|---|---|
| Vulcan 250L Electric Hot Water System | $1,029 | Electric storage | View |
| Rinnai Infinity B26 LPG Gas Hot Water System | $1,069 | Instant gas | View |
| Rheem 4-Star 135L LPG Gas Hot Water System | $1,489 | Gas storage | View |
| Rheem STELLAR 125L Electric Hot Water System | $1,169 | Electric storage | View |
| Rheem Stellar 330 Natural Gas Hot Water System | $1,839 | Gas storage | View |
| Rinnai 50L Electric Hot Water System | $499 | Electric storage | View |
| Dux 50L Electric Hot Water System | $569 | Electric storage | View |
| Rheem 50L Electric Hot Water System | $559 | Electric storage | View |
| Vulcan 50L Electric Hot Water System | $549 | Electric storage | View |
| Rinnai 125L Electric Hot Water System | $769 | Electric storage | View |
| Vulcan 125L Electric Hot Water System | $829 | Electric storage | View |
| Rheem 16 Natural Gas Hot Water System | $869 | Instant gas | View |
| Rheem 16 LPG Gas Hot Water System | $869 | Instant gas | View |
| Rinnai 160L Electric Hot Water System | $859 | Electric storage | View |
| Dux 125L Electric Hot Water System | $909 | Electric storage | View |
| Aquamax 125L Electric Hot Water System | $949 | Electric storage | View |
| Rinnai Infinity B16 LPG Gas Hot Water System | $909 | Instant gas | View |
| Rinnai Infinity B16 Natural Gas Hot Water System | $909 | Instant gas | View |
| Rheem 20 Natural Gas Hot Water System | $939 | Instant gas | View |
| Rheem 20 LPG Gas Hot Water System | $939 | Instant gas | View |
| Rinnai 250L Electric Hot Water System | $989 | Electric storage | View |
| Vulcan 160L Electric Hot Water System | $949 | Electric storage | View |
| Rheem 26 Natural Gas Hot Water System | $969 | Instant gas | View |
| Rheem 26 LPG Gas Hot Water System | $969 | Instant gas | View |
| Dux 160L Electric Hot Water System | $1,049 | Electric storage | View |
| Rheem 125L Electric Hot Water System | $1,049 | Electric storage | View |
| Rinnai Infinity B20 Natural Gas Hot Water System | $1,059 | Instant gas | View |
| Rinnai Infinity B20 LPG Gas Hot Water System | $1,059 | Instant gas | View |
| Rinnai Infinity B26 Natural Gas Hot Water System | $1,069 | Instant gas | View |
| Rinnai 315L Electric Hot Water System | $1,119 | Electric storage | View |
| Bosch 16H LPG Gas Hot Water System | $1,119 | Instant gas | View |
| Bosch 16H Natural Gas Hot Water System | $1,119 | Instant gas | View |
| Dux 250L Electric Hot Water System | $1,169 | Electric storage | View |
| Aquamax 250L Electric Hot Water System | $1,199 | Electric storage | View |
| Vulcan 315L Electric Hot Water System | $1,149 | Electric storage | View |
| Aquamax 160L Electric Hot Water System | $1,139 | Electric storage | View |
| Rheem 160L Electric Hot Water System | $1,219 | Electric storage | View |
| Dux 315L Electric Hot Water System | $1,309 | Electric storage | View |
| Vulcan 4-Star 135L Natural Gas Hot Water System | $1,259 | Gas storage | View |
| Vulcan 4-Star 135L LPG Gas Hot Water System | $1,259 | Gas storage | View |
| Aquamax SQUAT 160L Electric Hot Water System | $1,269 | Electric storage | View |
| Aquamax 315L Electric Hot Water System | $1,369 | Electric storage | View |
| Rheem STELLAR 160L Electric Hot Water System | $1,469 | Electric storage | View |
| Rheem 250L Electric Hot Water System | $1,349 | Electric storage | View |
| Vulcan 4-Star 170L Natural Gas Hot Water System | $1,489 | Gas storage | View |
| Rinnai 400L Electric Hot Water System | $1,689 | Electric storage | View |
| Rheem 4-Star 135L Natural Gas Hot Water System | $1,489 | Gas storage | View |
| Rheem 315L Electric Hot Water System | $1,529 | Electric storage | View |
| Rheem STELLAR 250L Electric Hot Water System | $1,539 | Electric storage | View |
| Dux 400L Electric Hot Water System | $1,659 | Electric storage | View |
Product price only. Delivery, valves, fittings, pipework, installation, gas or electrical work, old-unit removal, disposal and compliance upgrades are separate unless expressly included with the selected product.
Buy Hot Water Systems Online with Delivery Across Australia
Hot Water Outlet supplies hot water systems to eligible Australian postcodes, with delivery options depending on stock, product size and destination. Selected metro areas may have faster delivery options on eligible stocked systems.
Because water heaters are bulky freight, check the delivery option on the exact product and postcode. Urgent replacement orders should also confirm that the selected model, fuel, capacity and connection requirements are correct before dispatch.
Hot Water System Warranty & Maintenance
Warranty structure depends on the technology and product. Electric and gas storage products may separate cylinder coverage from elements, burners, valves, parts and labour. Heat pumps may separately cover the tank, refrigeration system, compressor and electronics. Continuous-flow gas systems can have separate heat-exchanger warranty terms.
Keep the model and serial number and follow the manufacturer’s maintenance requirements for the exact system.
Buying a Hot Water System from Hot Water Outlet
Hot Water Outlet is a supply-focused hot water store. Choose the system first, check the exact delivery option, then add the compatible valves, pipework and accessories required for the job. Installation is not included in the listed system price unless clearly stated separately.
For replacements, keep photos of the unit, data plate, valves, connections and surrounding area before ordering.
Hot Water System Questions
Answers to common hot water system price, type, sizing, energy, replacement, rebate, temperature, supply-only and warranty questions.