Under Sink Hot Water Systems
5 products
UNDER SINK HOT WATER · SOUTH EAST QUEENSLAND
Under Sink Hot Water Systems From $1,149
Compare compact under-sink hot water systems for kitchens, laundries, offices and local sinks, then use the selector to match the right type, size and installation setup.
Boiling Water · Vented SNU · Mains-Pressure SHC · Kitchens & Offices
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Under Sink Hot Water Systems Brisbane & Gold Coast
Under sink hot water systems provide compact point-of-use hot water close to the tap that needs it. They are ideal for kitchens, kitchenettes, offices, laundries, workshops, utility sinks and isolated basins where running hot water from the property's main system would be slow, wasteful or impractical.
JR Gas & Water supplies, replaces and installs under sink hot water systems throughout Greater Brisbane, the Gold Coast, Logan, Ipswich, Redlands, Moreton Bay and surrounding South East Queensland areas. Our current range includes compact mains-pressure storage, open-vented single-point systems and specialty under-sink boiling-water options.
The right under-bench water heater depends on more than tank litres. Cupboard space, power availability, water pressure, tapware, drainage, number of outlets and how much hot water is actually required all affect the best product.
JR Installer Verdict:
Under-sink hot water is at its best when one local area needs fast hot
water but does not justify extending a long hot-water run or installing a
larger whole-home system. Choose the installation type first, then the
litres.
What Type of Under Sink Hot Water System Do I Need?
Compact under-sink water heaters can look similar from the outside while operating very differently. The biggest decision in JR's current range is between mains-pressure storage, open-vented storage and dedicated boiling-water systems.
| System Type | Typical Sizes | Tapware | Best Suited To |
|---|---|---|---|
| Mains-Pressure Storage | 10L–15L | Compatible with normal suitable tapware | Kitchens, basins and one or more nearby outlets |
| Open-Vented Storage | 5L–10L | Requires compatible open-vented tapware | One isolated sink or point of use |
| Boiling Water System | Small specialty tank | Dedicated compatible tap arrangement | Near-boiling drinking and kitchen water |
| True Instant Electric | No large storage tank | Depends on system and installation | Applications needing tankless point-of-use hot water |
JR Installer Verdict:
The biggest mistake is treating every under-sink heater as interchangeable.
An SNU open-vented system, an SHC mains-pressure system and a true
instantaneous electric heater require different plumbing and electrical
arrangements.
Stiebel Eltron SHC vs SNU Under Sink Hot Water
The Stiebel Eltron SHC and SNU ranges are both compact storage water heaters designed to sit close to the point of use, but they use different plumbing arrangements.
| Feature | Stiebel Eltron SHC | Stiebel Eltron SNU |
|---|---|---|
| System Type | Mains-pressure / pressurised compact storage | Open-vented / non-pressurised compact storage |
| Current Sizes | 10L and 15L | 5L and 10L |
| Number of Outlets | Can serve multiple nearby outlets | Designed for a single draw-off point |
| Tapware | Can use suitable standard tapware | Requires compatible Stiebel Eltron open-vented tapware |
| Electrical Connection | Plug-in appliance on suitable power supply | Plug-in appliance on suitable power supply |
| Best For | Greater flexibility, normal tapware and higher local demand | Simple dedicated hot water at one isolated sink |
JR Installer Verdict:
Choose SHC when normal tapware or multiple nearby outlets matter. Choose
SNU when one dedicated sink suits the open-vented layout and compatible
tapware is acceptable.
Why Install Hot Water at the Point of Use?
Every metre of hot-water pipe between the central system and the tap holds water. When that pipe cools between uses, the cooled water needs to be displaced before freshly heated water reaches the outlet.
A point-of-use heater moves the hot water source much closer to the sink, reducing the length of hot pipe between the heater and outlet.
Faster Hot Water
Less pipework between the heater and tap means less waiting for hot water to arrive.
Less Water Wasted
Less cooled water needs to run down the drain while waiting for hot water from a distant central system.
Independent Local Supply
A remote sink can have its own dedicated hot water supply without depending on a long branch from the main household system.
Compact Installation
Small point-of-use systems fit inside suitable cupboards and avoid the footprint of a full-size storage cylinder.
Useful for Renovations
Local hot water can be practical where a kitchen, kitchenette or sink is moved away from existing central hot-water pipework.
Useful for Commercial Spaces
Offices, workshops, salons and staff kitchenettes often need hot water at only one or two local fixtures.
What Size Under Sink Hot Water System Do I Need?
Small storage systems should be sized around how the sink is actually used rather than the number of people in the property. Hand washing needs far less stored water than filling a large kitchen sink for washing up.
| Capacity | Typical Use | JR Guidance |
|---|---|---|
| 5L | Single basin or small sink | Best where repeated hot-water volume is modest |
| 10L | Kitchenette, sink or larger point-of-use demand | Strong general compact size with more useful stored volume |
| 15L | Larger sinks or higher local demand | Better where washing-up volumes would quickly exhaust a smaller unit |
| 2.6L Boiling Unit | Near-boiling drinking / kitchen water | Specialty use, not normal general hot-water storage |
JR Installer Verdict:
Five litres can be plenty for hand washing but frustrating for repeated
kitchen washing-up. Size the tank around the largest normal draw at that
particular sink.
Why a 10L Under Sink Tank Can Deliver More Than 10L of Usable Water
The tank's nominal capacity is not always the same as the amount of mixed water available at a comfortable outlet temperature. Stored hot water is normally mixed with colder water at the tap, increasing the total volume available before the tank is fully depleted.
| System | Nominal Storage | Approx. Mixed Water at 40°C* |
|---|---|---|
| Stiebel Eltron SNU 5 Plus | 5L | Approximately 10L |
| Stiebel Eltron SNU 10 Plus | 10L | Approximately 19L |
| Stiebel Eltron SHC 10 AU | 10L | Approximately 15.3L |
| Stiebel Eltron SHC 15 AU | 15L | Approximately 23L |
*Manufacturer mixed-water figures are based on specified test conditions. Actual usable volume depends on incoming water temperature, stored-water temperature, required outlet temperature and usage.
JR Installer Verdict:
Compare useful mixed-water volume as well as tank litres. It gives a
better picture of how much practical warm water a compact tank can
deliver at the sink.
Best Under Sink Hot Water Systems – JR Installer Picks
JR's current under-sink range is centred on Stiebel Eltron because the products cover the main point-of-use installation types clearly: compact mains pressure, open vented and dedicated boiling water.
Best All-Round Under Sink Pick
Stiebel Eltron SHC 10 AU
A compact 10L mains-pressure storage system that can work with normal suitable tapware and serve more than one nearby outlet. This is our strongest general starting point for many under-bench installations.
View Stiebel Eltron SHC 10 →Best Higher-Capacity Pick
Stiebel Eltron SHC 15 AU
The 15L SHC provides a larger stored reserve for kitchens, kitchenettes and local applications that regularly require more hot water than a 10L tank can comfortably supply.
View Stiebel Eltron SHC 15 →Best Compact Single-Sink Pick
Stiebel Eltron SNU 5
A compact 5L open-vented solution for one isolated sink where space is limited and the dedicated compatible tapware suits the installation.
View Stiebel Eltron SNU 5 →Best Larger Open-Vented Pick
Stiebel Eltron SNU 10
The larger 10L open-vented option for a dedicated sink needing more usable hot water while retaining the specialised SNU installation format.
View Stiebel Eltron SNU 10 →Best Near-Boiling Water Pick
Stiebel Eltron HOT 2.6 N
A specialty under-sink boiling-water system for kitchens and offices wanting near-boiling water at the tap for drinks and food preparation rather than normal sink hot-water storage.
View Stiebel Eltron HOT 2.6 N →
JR Installer Verdict:
For most normal kitchen or basin applications, start by deciding whether
you want mains-pressure SHC or open-vented SNU. Only compare the boiling
unit if near-boiling drinking water is actually the goal.
What Is a Mains-Pressure Under Sink Hot Water System?
A mains-pressure compact storage heater is connected as a pressurised hot water system. This gives it more flexibility with normal suitable tapware and can allow one compact tank to serve more than one nearby fixture.
The Stiebel Eltron SHC 10 AU and SHC 15 AU are examples of this design. They are compact storage water heaters intended for under-bench installation close to the outlets they supply.
Why Choose Mains Pressure?
- Works with suitable normal tapware.
- Can supply multiple nearby outlets.
- Available in 10L and 15L storage sizes.
- Compact under-bench design.
- Plug-in electrical connection on suitable installation.
- Useful for kitchens, basins, offices and utility areas.
JR Installer Verdict:
SHC is usually the more flexible choice where you want to keep normal
tapware or feed more than one nearby fixture. The trade-off is that a
pressurised storage heater has different safety and drainage requirements
from an open-vented SNU.
What Is an Open-Vented Under Sink Hot Water System?
An open-vented or non-pressurised under-sink water heater uses specialised tapware as part of the pressure-control arrangement. The tank itself is not exposed to normal mains pressure in the same way as a mains-pressure compact storage system.
Stiebel Eltron SNU 5 and SNU 10 systems are designed for one dedicated point of use and must be installed with compatible Stiebel Eltron open-vented sink tapware.
Why Choose Open Vented?
- Compact 5L and 10L options.
- Purpose designed for one isolated sink.
- Plug-in electrical connection on suitable installation.
- Very short hot-water pipe run when mounted close to the tap.
- Simple point-of-use solution where specialised tapware suits the job.
JR Installer Verdict:
SNU works very well when the installation is designed around it from the
beginning. It becomes the wrong choice when the customer expects to keep
ordinary tapware or feed several outlets.
How Much Cupboard Space Does an Under Sink Water Heater Need?
The physical tank is only part of the space requirement. The cupboard also needs enough room for plumbing connections, isolation, safety components where required, electrical access and future servicing.
Before Choosing a Unit, Check:
- Available cupboard height.
- Available cupboard width and depth.
- Sink bowl depth above the proposed heater position.
- Waste trap and drainage pipe location.
- Water filter systems already installed in the cupboard.
- Bins, drawers and internal shelving.
- Power point position.
- Hot and cold water connection positions.
- Access for valves and servicing.
- Safe-tray or drainage requirements where applicable.
JR Installer Verdict:
Measure the usable cupboard, not just the cabinet door opening. A unit can
technically fit inside a cabinet but still be impossible to install
properly once the sink bowl, trap, filter and connections are taken into
account.
Do Under Sink Hot Water Systems Need Electricity?
The compact systems in JR's current under-sink range are electric. Many plug into a suitable nearby general-purpose outlet, but the exact electrical requirements of the selected model and installation still need to be checked.
| System | Rated Heating Output | General Electrical Arrangement |
|---|---|---|
| SHC 10 AU | Approximately 1.6kW | Plug-in compact storage |
| SHC 15 AU | Approximately 1.6kW | Plug-in compact storage |
| SNU 5 Plus | Approximately 2.2kW | Plug-in compact storage |
| SNU 10 Plus | Approximately 2.2kW | Plug-in compact storage |
A suitable power point still needs to be positioned appropriately for the appliance and installation. If no suitable electrical supply exists, additional electrical work may be required.
Under Sink Hot Water Systems for Kitchens
Kitchens are one of the strongest applications for point-of-use hot water. The main household water heater is often located outside, in a garage or on the opposite side of the property, leaving a long hot-water pipe run to the kitchen.
Installing a compact system beneath the kitchen sink can reduce waiting time and provide a predictable local volume of hot water for washing up, rinsing and cleaning.
JR Installer Verdict:
If the kitchen regularly runs litres of cold water down the drain waiting
for the main system, point-of-use hot water is worth comparing before
spending money trying to improve a long pipe run.
Under Sink Hot Water for Offices, Workshops & Commercial Sinks
Compact local storage is also useful where a business needs hot water at only one small area and installing a larger central hot water system would be excessive.
Office Kitchenettes
Local hot water for sinks and staff kitchen areas without a long central hot-water run.
Workshops & Sheds
Practical point-of-use hot water for utility sinks and staff wash areas.
Salons & Treatment Rooms
Compact local hot water where demand is limited to selected basins or sinks.
Commercial Hand Basins
Local hot water for isolated hand-washing locations where suitable installation conditions exist.
Staff Rooms
Small storage or boiling-water options for tea points and staff kitchen facilities.
Granny Flats & Studios
Useful for isolated sinks or secondary spaces with modest local hot water requirements.
Under Sink Hot Water vs Boiling Water Systems
A standard under-sink storage heater and an under-sink boiling-water system are designed for different jobs.
| Comparison | Under Sink Hot Water | Boiling Water System |
|---|---|---|
| Primary Use | General washing and sink hot water | Near-boiling drinking and kitchen water |
| Typical Temperature | Normal household hot-water range | Near boiling |
| Typical Storage | 5L–15L in JR's current compact range | Small specialty boiling-water tank |
| Tapware | Depends on mains-pressure or open-vented system | Dedicated compatible boiling-water tap arrangement |
| Best For | Washing, rinsing and general sink use | Tea, coffee, cooking and near-boiling water convenience |
JR Installer Verdict:
Do not buy a boiling-water system when all you need is normal sink hot
water, and do not expect a normal under-sink storage heater to replace a
dedicated boiling-water tap.
Under Sink Storage vs Instant Electric Hot Water
Compact storage and true instantaneous electric systems can both sit close to the point of use, but they place very different demands on the electrical supply.
| Comparison | Compact Under Sink Storage | Instant Electric |
|---|---|---|
| Hot Water Storage | Small storage tank | No large stored reserve |
| Heating | Heats a small volume over time | Heats water while it flows |
| Electrical Demand | Relatively modest | Can be very high |
| Hot Water Limit | Stored volume plus recovery | Heating output and flow rate |
| Best For | Predictable low-volume local use | Suitable tankless point-of-use applications |
JR Installer Verdict:
Compact storage is often the easier electrical solution for a normal sink.
True instantaneous electric becomes more attractive where tankless
operation is important and the electrical supply can support the required
heating power.
Compare instant electric hot water →
How Much Does an Under Sink Hot Water System Cost?
Under-sink hot water cost depends on the system type, storage capacity, tapware and installation requirements. A straightforward replacement of an existing compatible unit generally costs less than adding a completely new point-of-use hot water installation.
JR Gas & Water displays current products and installed pricing in the live product range above so customers can compare actual available systems rather than relying on a generic price estimate.
What Can Change the Installation Price?
- Mains-pressure versus open-vented system.
- 5L, 10L or 15L storage capacity.
- Existing tapware compatibility.
- Whether specialised open-vented tapware is required.
- Available cupboard space.
- Nearby power supply.
- Existing water connections.
- Pressure-control requirements.
- Safe tray and drainage requirements where applicable.
- Whether more than one outlet is being supplied.
- Sink waste and cupboard layout.
- New installation versus like-for-like replacement.
JR Installer Verdict:
Under-sink systems themselves are small, but the installation still needs
to be designed correctly. Tapware, pressure arrangement and drainage can
make a bigger difference to the job than moving from a 10L to a 15L tank.
Under Sink Hot Water Installation Brisbane & Gold Coast
JR Gas & Water installs compact under-sink hot water systems throughout Brisbane and the Gold Coast for homes, offices, shops, workshops, kitchenettes and other suitable point-of-use applications.
Confirm System Type
Decide whether the installation needs mains-pressure SHC, open-vented SNU, boiling water or another point-of-use solution.
Check Cupboard Space
Confirm that the heater, valves, plumbing and future service access can all fit properly around the sink and waste pipe.
Check Tapware
Standard tapware may suit mains-pressure storage, while SNU systems require compatible open-vented tapware.
Check Power
Confirm a suitable electrical supply is available at the installation location.
Connect & Commission
Complete the required water, safety and electrical connections, fill the system and confirm correct operation.
Confirm Access
Leave the installation serviceable rather than burying the heater and important valves behind fixed shelves or cabinetry.
Under Sink Hot Water Systems Brisbane & Gold Coast
Under Sink Hot Water Brisbane
JR Gas & Water supplies and installs under-bench hot water systems throughout Greater Brisbane, including Brisbane City, Brisbane North, Brisbane South, Logan, Ipswich, Redlands and surrounding service areas.
These systems are particularly useful for renovated kitchens, isolated sinks, granny flats, workshops and commercial spaces where the main hot water service is too far from the outlet or a small local supply is more practical.
View hot water installation in Brisbane →Under Sink Hot Water Gold Coast
JR Gas & Water installs compact point-of-use hot water systems throughout the Gold Coast for residential and suitable commercial applications.
Before choosing the unit, we consider cupboard dimensions, tapware, water pressure, power availability and whether a mains-pressure or open-vented installation provides the cleaner long-term solution.
View hot water installation on the Gold Coast →What We Have Learned Installing Under Sink Hot Water Systems
Compact hot water looks simple because the products are small. In practice, point-of-use systems are highly dependent on the cupboard, tapware and way the sink is actually used.
Choose the Pressure Type First
Whether the system is mains pressure or open vented usually matters more to the installation than the difference between 5L and 10L.
Measure Around the Sink Bowl
The cabinet may look large until the sink bowl, trap and waste pipe occupy most of the usable space.
Five Litres Is More Useful Than It Sounds
Stored hot water is mixed with cold at the outlet, so a small tank can provide more usable warm-water volume than its nominal litres alone suggest.
Ten Litres Is Our Strong General Starting Point
For many normal kitchen and kitchenette applications, 10L provides a useful balance between cupboard space and practical stored volume.
Kitchen Use Is Different From Hand Washing
Hand basins use small intermittent volumes. Filling a sink or washing dishes creates a much larger single draw and may justify 15L storage.
Point-of-Use Can Fix a Pipe-Run Problem
Sometimes the main hot water system is perfectly good; the problem is simply that the sink is too far away from it. A local heater addresses that specific problem directly.
JR Installer Verdict:
Under-sink hot water is one of those categories where the best product is
often obvious once we know the sink layout. Photos of the cupboard,
tapware, plumbing and power can often tell us more than a long list of
product features.
Under Sink Hot Water System FAQs
What is an under sink hot water system?
An under-sink hot water system is a compact point-of-use water heater installed close to the sink or basin it serves. Most compact units store a small amount of heated water locally, reducing the wait for hot water from a distant whole-home system.
Is under sink hot water the same as instant hot water?
Not necessarily. Many under-sink systems are compact storage water heaters with 5L, 10L or 15L tanks. True instantaneous electric systems do not store a large volume of water and instead heat it as it flows through the unit.
What is the difference between Stiebel Eltron SHC and SNU?
SHC is a mains-pressure compact storage range available in 10L and 15L sizes and can work with suitable standard tapware and multiple nearby outlets. SNU is an open-vented 5L or 10L single-point system that must use compatible Stiebel Eltron open-vented tapware.
Is a 5L under sink water heater big enough?
A 5L system can be very effective for a basin or small sink with modest intermittent demand. It may be too small for repeated kitchen washing-up or larger sink fills. The amount of hot water required in one typical use is more important than occupant count.
Should I choose a 10L or 15L under sink water heater?
A 10L system is a strong general compact choice for many kitchens and local sinks. A 15L system provides greater stored volume for applications where larger sink fills, repeated washing-up or higher local demand would exhaust a 10L tank too quickly.
Can a 10L water heater provide more than 10L of warm water?
Yes. Stored hot water is normally mixed with colder water at the tap. Under specified manufacturer test conditions, the Stiebel Eltron SHC 10 can provide approximately 15.3L of mixed water at 40°C, while the SNU 10 can provide approximately 19L.
Can an under sink water heater use my existing kitchen tap?
It depends on the water heater. Mains-pressure systems such as the Stiebel Eltron SHC can work with suitable standard tapware. Open-vented SNU systems require compatible specialised open-vented tapware.
Can one under sink water heater supply two taps?
Selected mains-pressure systems can supply more than one nearby outlet. The Stiebel Eltron SHC range is designed for multi-point use. Open-vented SNU systems are designed for one dedicated draw-off point.
Do under sink hot water systems plug into a normal power point?
The Stiebel Eltron SHC and SNU compact storage systems in JR's current range are plug-in appliances when installed with a suitable electrical supply. The location and suitability of the power point should still be checked before installation.
Do under sink hot water systems need a safe tray and drain?
Requirements depend on the system type and installation. Pressurised compact storage systems such as the SHC have safety-valve and installation requirements that differ from open-vented SNU systems. The exact installation should follow the manufacturer instructions, applicable plumbing requirements and the conditions at the site.
Can I install an under sink hot water system in a kitchen?
Yes. Kitchens are one of the most common applications, particularly where the main hot water system is far from the sink. Cupboard space, tap compatibility, plumbing, drainage and a suitable power supply should be confirmed first.
Can under sink hot water supply a shower?
Compact 5L, 10L and 15L under-sink storage systems are designed for local sink and basin use rather than normal whole-shower demand. If a bathroom or shower requires independent hot water, a larger storage or suitably sized instantaneous system should be compared.
What is the best under sink hot water system?
For many general applications, JR starts with the Stiebel Eltron SHC 10 because it combines compact 10L storage with mains-pressure operation and normal tapware compatibility. The SHC 15 suits higher local demand, while SNU 5 and SNU 10 suit dedicated open-vented single-sink installations.
How much does an under sink hot water system cost installed?
Installed cost depends on the heater, tank capacity, tapware, plumbing, drainage, cupboard layout and electrical supply. A like-for-like replacement is normally simpler than adding a new point-of-use system where no suitable services currently exist. Current JR installed pricing is shown in the product range above.
Do you install under sink hot water in Brisbane and Gold Coast?
Yes. JR Gas & Water supplies and installs under-sink and under-bench hot water systems throughout Greater Brisbane, the Gold Coast, Logan, Ipswich, Redlands, Moreton Bay and surrounding South East Queensland service areas.
Compare Under Sink & Point-of-Use Hot Water
Compare the current compact water heaters or explore related hot water technologies if your application requires more capacity or a different heating method.
Under Sink Hot Water
Stiebel Eltron SHC 10
Stiebel Eltron SHC 15
Stiebel Eltron SNU 5
Stiebel Eltron SNU 10
Stiebel Eltron HOT 2.6 N
Instant Electric Hot Water
Boiling & Chilled Water Taps
Electric Hot Water Systems
All Hot Water Systems
Brisbane Hot Water
Gold Coast Hot Water
Under Sink Hot Water Guide
Choose Your Under Sink Hot Water System
Compare compact under-sink hot water systems and current installed pricing above. If you are unsure whether you need mains-pressure SHC, open-vented SNU, a larger tank, specialist tapware or a different point-of-use solution, book an onsite quote assessment and we can check the cupboard, plumbing, tapware and power before you choose.
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