If you are building a new kitchen or upgrading your home, you have probably asked yourself: should I get a boiling water tap or stick with a traditional hot water system? It is a fair question. Both options give you hot water, but they work very differently and cost very differently too.
A boiling water tap delivers instant boiling water right at your kitchen sink. No waiting. No kettle. A hot water system, on the other hand, heats and stores water in a tank (or heats it on demand) for your whole house, including showers, laundry, and kitchen use. The cost comparison between these two is not as simple as looking at the price tag. You need to think about the purchase price, installation fees, energy bills, maintenance, and how long each system lasts.
In this guide, we break down every cost you need to know so you can make a smart choice for your Australian home. Whether you are looking at instant boiling water taps for your kitchen or a full hot water system for the house, this article will help you see the real numbers.
What Is a Boiling Water Tap?
A boiling water tap is a kitchen tap that gives you boiling water the moment you turn it on. It connects to a small tank that sits under your kitchen bench. This tank keeps a set amount of water heated to near-boiling temperature at all times. When you need hot water for tea, coffee, cooking, or cleaning, you simply press the safety button and turn the handle.
Modern boiling water taps do more than just boil water. Many models also give you chilled filtered water and even sparkling water from the same tap. This means you can replace your kettle, water filter jug, and soda maker with one sleek tap.
These taps come with built-in safety features like child-proof handles and insulated spouts to prevent burns. The water flow is also controlled so it does not splash. For Australian families, this makes them a safer and more practical option than a traditional kettle sitting on the bench.
If you want to explore the full range of options, check out our instant boiling water taps collection, which includes models that deliver boiling, chilled, and filtered water from a single tap.
What Is a Traditional Hot Water System?
A traditional hot water system heats water for your entire home. It powers your showers, bathroom taps, kitchen sink, laundry, and dishwasher. These systems come in several types, including electric storage tanks, gas water heaters, solar hot water systems, and heat pumps.
Storage systems heat a large amount of water and keep it in an insulated tank until you need it. The tank sizes range from 25 litres to over 400 litres, depending on your household size. Continuous flow (or tankless) systems, on the other hand, heat water on demand as it passes through the unit. This means you never run out of hot water, but the flow rate can be limited if multiple taps are running at the same time.
Hot water systems are essential for any home. They are a major appliance, and the type you choose affects your energy bills for years to come. In Australia, hot water heating accounts for roughly 15 to 27 percent of household energy use, making it one of the biggest energy expenses in the home.
Boiling Water Tap vs Hot Water System: Key Differences
Before we get into the dollar figures, it helps to understand how these two options differ at a basic level. A boiling water tap is a kitchen-specific appliance. It gives you instant boiling, chilled, or sparkling water for drinking and cooking. A hot water system is a whole-house solution that heats water for bathing, cleaning, and all other uses.
Here is a quick summary of the main differences:
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Purpose: Boiling water taps serve the kitchen. Hot water systems serve the entire home.
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Water temperature: Boiling taps deliver near-100°C water instantly. Hot water systems typically heat water to 60-65°C.
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Tank size: Boiling taps use small 2-7 litre tanks. Hot water systems use 25-400+ litre tanks.
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Energy use: Boiling taps use a small amount of power to keep a few litres hot. Hot water systems consume far more energy heating large volumes.
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Extra features: Many boiling taps also provide chilled and sparkling filtered water. Hot water systems only provide heated water.
They are not direct replacements for each other. Most homes will have a hot water system for the house and may add a boiling water tap to the kitchen for convenience and energy savings.
Upfront Cost: Purchase Price Comparison
Boiling Water Tap Purchase Cost
The price of a boiling water tap in Australia varies depending on the features and brand. A basic boiling-only tap can start from around $500 for budget models. Mid-range models that include boiling and chilled water usually fall between $1,500 and $3,000. Premium taps that offer boiling, chilled, and sparkling water from one tap can cost between $3,000 and $5,000.
At Alia Global, for example, the 4-in-1 boiling and chilled water tap is priced at $2,500, while the X51 boiling, chilled, and sparkling water tap ranges from $3,850 to $4,350. These prices include the tap, under-bench tank, and filtration system.
Hot Water System Purchase Cost
Traditional hot water systems have a wider price range because of the many types available. Electric storage systems are the cheapest to buy, starting from around $450 and going up to $2,500. Gas water heaters cost between $750 and $2,000. Heat pump systems range from $2,500 to $4,000. Solar hot water systems are the most expensive upfront, costing between $3,600 and $7,000 or more.
Keep in mind that these prices are for the unit only. Installation is extra and can add a significant amount to the total cost.
Installation Costs: What to Expect
Boiling Water Tap Installation
Installing a boiling water tap is fairly simple. You need a hole in your kitchen bench, access to a power point under the sink, and a connection to your cold water supply. Most installations take a few hours and cost around $250 to $500.
If you have a stone or marble benchtop, you might need a stonemason to drill the hole, which can add an extra $250 or more. For timber or laminate benches, the cost is usually lower. Overall, installation is one of the areas where a boiling water tap wins on cost.
Hot Water System Installation
Hot water system installation is more complex and expensive. A straightforward like-for-like replacement usually costs between $400 and $1,200 for labour alone. If you are switching from one type to another (for example, from gas to electric or to a heat pump), you might need new plumbing, electrical work, or gas line modifications. This can push the total installation cost to anywhere from $1,000 to $3,000 or higher.
In Australia, installation costs also vary by state and city. Sydney and Melbourne tend to be more expensive than regional areas. Some systems, like solar hot water, require roof-mounted panels and more complex setup, which adds to the bill. The total installed cost for a hot water system typically ranges from $1,000 to $7,000 depending on the type and complexity.
Running Costs: Energy Bills Over Time
This is where the comparison gets really interesting. The running cost of any appliance matters more than the purchase price over the long term.
Boiling Water Tap Running Costs
A boiling water tap uses a relatively small amount of electricity to keep its tank heated. Most quality models use between 10 and 15 watts on standby to maintain temperature, thanks to well-insulated tanks. The actual energy used when dispensing water is also minimal because the water is already hot.
On average, a boiling water tap costs between $30 and $60 per year in electricity. This is comparable to, or even less than, what a household spends boiling a kettle multiple times a day. The key advantage is zero water waste. You only heat exactly what you need, unlike a kettle where people often overfill and reboil.
Hot Water System Running Costs
Hot water systems are a much bigger energy expense. Annual running costs in Australia depend heavily on the type of system:
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Electric storage: $400 to $1,000+ per year
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Gas storage: $300 to $700 per year
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Gas continuous flow: $250 to $600 per year
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Heat pump: $150 to $500 per year
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Solar (electric boosted): $150 to $490 per year
Electric storage systems are the most expensive to run because they keep a large volume of water hot around the clock, losing heat through the tank walls. Gas and heat pump systems are more efficient, and solar systems offer the lowest running costs once installed.
When you compare the running cost of a boiling water tap ($30-$60 per year) to a hot water system ($150-$1,000+ per year), the tap is clearly cheaper to operate. However, remember that they serve different purposes. The hot water system heats water for your whole house, not just the kitchen.
Maintenance Costs and Lifespan
Boiling Water Tap Maintenance
Boiling water taps require regular filter replacements to keep the water tasting clean and to protect the internal components from scale buildup. Most filters need to be replaced every 6 to 12 months, depending on your water quality and usage. Replacement filters typically cost between $50 and $180 each.
Aside from filters, boiling water taps need very little maintenance. A quality tap should last 8 to 13 years or more with proper care. Occasional descaling may be needed in areas with hard water, but this is a simple process that most homeowners can do themselves.
Hot Water System Maintenance
Hot water systems need more regular upkeep. Anode rods in storage tanks should be checked every few years and replaced when worn out, which costs around $150 to $300 including labour. Pressure and temperature relief valves should also be tested regularly. Tank flushing is recommended to remove sediment buildup.
The lifespan of a hot water system varies by type. Electric storage tanks last around 8 to 12 years. Gas systems last 8 to 12 years. Solar and heat pump systems can last 15 to 20 years with proper maintenance. When a hot water system fails, replacement is often urgent and expensive, especially if you need to upgrade the plumbing or electrical setup.
Long-Term Cost Comparison: 10-Year Outlook
Let us put it all together and compare the total costs over a 10-year period for a typical Australian household.
Boiling Water Tap (10-year estimate):
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Purchase: $2,500 to $4,500
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Installation: $250 to $500
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Running costs (10 years): $300 to $600
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Filter replacements (10 years): $500 to $1,800
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Total: approximately $3,550 to $7,400
Electric Storage Hot Water System (10-year estimate):
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Purchase: $450 to $2,500
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Installation: $1,000 to $2,000
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Running costs (10 years): $4,000 to $10,000
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Maintenance (10 years): $300 to $600
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Total: approximately $5,750 to $15,100
As you can see, a boiling water tap costs less in every category except the initial purchase price for budget electric systems. Over 10 years, the running costs of a hot water system far exceed those of a boiling water tap. Of course, you still need a hot water system for your house. But adding a boiling water tap to your kitchen can reduce your reliance on the kettle and lower your overall kitchen energy use.
Which Option Is Right for Your Home?
The truth is, most homes need both. A hot water system handles your showers, laundry, and general hot water needs. A boiling water tap takes care of your kitchen, giving you instant boiling water for cooking, drinks, and cleaning without waiting or wasting energy.
If you are renovating your kitchen, a boiling water tap is a smart addition that pays for itself over time through energy savings and convenience. If your hot water system is old and costing you a fortune in energy bills, upgrading to a heat pump or solar system will make the biggest impact on your annual costs.
For kitchens, we recommend exploring instant hot cold water taps that combine boiling, chilled, and regular water in one stylish unit. You might also want to consider adding a sparkling water tap for that extra touch of luxury.
Benefits of Choosing a Boiling Water Tap for Your Kitchen
Beyond the cost savings, there are several reasons why Australian homeowners are switching to boiling water taps.
Convenience and time savings: No more waiting for the kettle to boil. Whether you are making a cup of tea, blanching vegetables, or filling a pot for pasta, boiling water is there the instant you need it. This might seem small, but it adds up to real time saved every single day.
Reduced bench clutter: A boiling water tap replaces your kettle, water filter jug, and possibly even your soda maker. This frees up valuable bench space and gives your kitchen a cleaner, more modern look.
Filtered water quality: Most boiling water taps include built-in filtration systems that remove chlorine, sediment, and other impurities. This means every cup of water you drink tastes better and is better for your health.
**Safety features:** Quality boiling water taps come with child-proof handles and insulated spouts. This is actually safer than having a hot kettle on the bench where little hands can reach it. If you are also upgrading your kitchen, take a look at our smart sink collection and designer basins to complete the upgrade.
**Energy efficiency:** Because the tank is small and well-insulated, standby energy use is minimal. You heat only what you need and nothing goes to waste. If you want chilled water without running the tap and waiting, an instant chilled water tap gives you cold filtered water on demand too.
How to Save Money on Your Hot Water Setup
Whether you go with a boiling water tap, a hot water system, or both, there are ways to keep your costs down.
Take advantage of government rebates. In Australia, the federal and state governments offer rebates for energy-efficient hot water systems like heat pumps and solar water heaters. These rebates through Small-scale Technology Certificates (STCs) can save you anywhere from $400 to $1,300 on your new system. Check your state's energy efficiency programs to see what is available.
Right-size your hot water system. An oversized tank wastes energy by heating more water than you need. An undersized tank runs out of hot water and forces the system to reheat constantly. As a general rule, each person in the household uses about 50 litres of hot water per day. A family of four should look at a 160 to 250 litre tank.
Add a boiling water tap to your kitchen. Instead of relying on your hot water system (and your kettle) for every cup of tea, a dedicated boiling water tap uses far less energy for kitchen tasks. This reduces the load on your main hot water system and cuts your kitchen energy costs.
**Keep up with maintenance.** Regular filter changes on your boiling water tap and periodic maintenance on your hot water system will keep both running at peak performance and help avoid expensive breakdowns. Browse our full range of collections to find the right products for your home.
Final Verdict: Boiling Water Tap vs Hot Water System
When it comes to the cost comparison between a boiling water tap and a hot water system, the answer depends on what you need. A hot water system is a must-have for any home. It heats water for your showers, laundry, and general use. But it comes with high running costs, especially if you have an older electric storage system.
A boiling water tap is a kitchen upgrade that saves you money on energy, time, and bench space. It costs less to install, less to run, and less to maintain. While the upfront price can be higher than a basic kettle, the long-term savings and daily convenience make it a worthwhile investment for most Australian homes.
For the best of both worlds, consider pairing an efficient hot water system with a quality boiling water tap in the kitchen. If you are ready to upgrade, explore our full range of all products at Alia Global and find the perfect tap for your home.
And if your bathroom is due for a refresh too, our smart toilet collection brings the same level of innovation to your bathroom. Check out our
range of smart toilets for a complete home upgrade.
Frequently Asked Questions
1. Is a boiling water tap cheaper to run than a kettle?
Yes, in most cases a boiling water tap is cheaper to run than a kettle. A quality boiling water tap costs around $30 to $60 per year in electricity, while a kettle used multiple times a day can cost a similar amount or more. The big difference is water waste. Most people overfill the kettle and boil more water than they need. A boiling water tap gives you exactly the amount you ask for, so no energy or water is wasted.
The savings become even more noticeable in busy households or offices where multiple people boil the kettle throughout the day. With a boiling water tap, there is no waiting, no reboiling, and no standing energy loss from a half-full kettle cooling down on the bench.
2. Can a boiling water tap replace my hot water system?
No, a boiling water tap cannot replace a hot water system. They serve different purposes. A boiling water tap is designed for kitchen use only. It gives you boiling, chilled, and filtered water for cooking and drinking. A hot water system heats water for your whole home, including showers, baths, laundry, and dishwashers.
Think of a boiling water tap as a complement to your hot water system, not a replacement. Adding one to your kitchen can reduce the energy your household uses for kitchen-related hot water tasks, but you will still need a traditional hot water system for everything else.
3. How much does it cost to install a boiling water tap in Australia?
Installation costs for a boiling water tap in Australia generally range from $250 to $500. This covers connecting the tap to your cold water supply and plugging the under-bench tank into a power point. If your benchtop is made of stone or marble, you may need to pay extra for a stonemason to cut the tap hole, which can add $250 or more.
Compared to hot water system installation, which can cost $1,000 to $3,000 or more, a boiling water tap is significantly cheaper and quicker to install. Most installations are completed in just a few hours.
4. How often do boiling water tap filters need to be replaced?
Most boiling water tap filters should be replaced every 6 to 12 months, depending on your water quality and how often you use the tap. In areas with harder water or higher sediment levels, you may need to change the filter more frequently. Replacement filters typically cost between $50 and $180.
Keeping up with filter replacements is important. A fresh filter ensures your water tastes clean, protects the tap and tank from limescale buildup, and keeps the system running at peak performance. Most quality taps will have an indicator light that tells you when it is time for a new filter.