Under Sink Water Filters From $549 Installed
Compare under-sink filtration for your existing mixer, a dedicated filtered-water tap or a 3-way mixer, then refine by treatment level, verification, water conditions, household demand, cupboard space and installed price.
Find the Right System for Your Kitchen
We compare the complete under-sink collection and refine the recommendations around your tap setup, treatment priorities, verification, water conditions, daily use, available space and budget.
Drag to compare how your recommended filtration system changes with budget and treatment level. JR Recommended stays fixed in the middle.
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Under Sink Water Filters for Brisbane & Gold Coast
Under sink water filters provide dedicated filtered water at the kitchen or another drinking-water outlet without needing to filter the complete household water supply. The filtration system sits neatly inside the cabinet while filtered water is delivered through a dedicated tap or compatible kitchen mixer.
JR Gas & Water supplies and installs under sink water filtration systems throughout Greater Brisbane, the Gold Coast, Logan, Ipswich, Redlands, Moreton Bay, Scenic Rim and surrounding South East Queensland areas.
Our range includes compact drinking-water filters, single and multi-stage systems, quick-change cartridge systems and filtration packages that can be paired with either a separate filtered-water tap or a 3-way kitchen mixer. Reverse osmosis is also available where a more specialised drinking-water treatment system is required.
The right under sink filter depends on what you want from your drinking water, available cupboard space, desired water flow, cartridge type, replacement cost, tap arrangement and how much filtered water the household uses.
What Is an Under Sink Water Filter?
An under sink water filter is a point-of-use filtration system installed inside or near the kitchen cabinet. Rather than filtering the complete water supply entering the home, it treats water specifically for a drinking-water outlet.
The system connects to the cold-water supply below the sink. Water passes through the selected filtration cartridge or cartridges before being delivered to a dedicated filtered-water tap or the filtered-water channel of a compatible 3-way mixer.
Hidden Below the Sink
The filter is installed within the kitchen cabinet so the filtration equipment does not need to sit on the benchtop.
Dedicated Drinking Water
Filtered water is provided specifically for drinking, cooking, filling bottles, tea, coffee and other kitchen uses.
Point-of-Use Filtration
Only the water required at the selected outlet is filtered rather than the much greater volume used throughout the complete home.
How Does an Under Sink Water Filter Work?
An under-sink system takes a controlled supply of cold water, passes it through the filtration equipment and sends the treated water to the selected drinking water outlet.
1. Cold Water Supply
The filtration system connects to the cold-water plumbing beneath the sink.
2. Water Enters the Filter
Water is directed through the selected cartridge or multi-stage filtration system.
3. Filtration Takes Place
The filter media performs the treatment function the individual cartridge has been designed to provide.
4. Filtered Water Line
Treated water leaves the filter through a separate filtered-water line.
5. Filter Tap or 3-Way Mixer
The filtered-water line connects to a dedicated tap or separate internal channel within a compatible 3-way kitchen mixer.
6. Cartridge Replacement
The cartridge is periodically replaced according to its capacity, use and manufacturer servicing requirements.
Why Choose an Under Sink Water Filter?
Filtered Water Where You Use It Most
The system concentrates filtration at the kitchen where drinking, cooking, bottle filling and food preparation normally take place.
No Benchtop Filter Unit
The filtration equipment stays below the sink, keeping the kitchen bench clear.
Lower Flow Requirement
Because only drinking water is filtered, the system does not need to support whole-house shower and appliance flow.
Flexible Tap Options
Choose between a separate dedicated filtered-water tap or a 3-way mixer that combines hot, cold and filtered water in one fixture.
Suitable for Many Property Types
Under-sink filtration can suit houses, townhouses and apartments where a whole-house filtration installation may not be required.
Easy to Upgrade Later
A kitchen filtration system can be replaced or upgraded later if the household's drinking-water requirements change.
Types of Under Sink Water Filters
Under sink filtration is available in several configurations. The right option depends on treatment requirements, cupboard space, desired flow, cartridge cost and the level of filtration wanted.
Single-Stage Water Filters
A single cartridge performs the selected filtration function in a compact system with relatively simple servicing.
Multi-Stage Water Filters
Two or more treatment stages can be combined where different filtration media are required for the drinking-water application.
Quick-Change Filter Systems
Quick-change systems use sealed replacement cartridges designed to make future cartridge servicing cleaner and more straightforward.
Dedicated Filter Tap Systems
Filtered water is delivered through a separate drinking-water tap installed beside the main kitchen mixer.
3-Way Mixer Systems
A compatible 3-way mixer provides normal hot and cold water plus a separate filtered-water pathway through the same tap body.
Compare 3-way kitchen mixers →Reverse Osmosis Systems
Reverse osmosis is a more specialised under-sink treatment category using membrane filtration for households wanting broader dissolved-substance reduction in dedicated drinking water.
Compare reverse osmosis →Compare Under Sink Water Filter Types
| System Type | Main Advantage | Main Consideration | Best Suited To |
|---|---|---|---|
| Single-Stage | Compact and straightforward | One cartridge performs the main treatment role | Simple drinking-water filtration |
| Multi-Stage | Combines different filtration media | More cartridges and servicing | Homes wanting several treatment functions |
| Quick-Change | Simple cartridge replacement | Uses system-specific replacement cartridges | Convenience-focused households |
| Dedicated Filter Tap | Keeps filtered water completely separate | Requires a second tap at the sink | Homes happy with two fixtures |
| 3-Way Mixer | Hot, cold and filtered water from one tap | Mixer must be compatible with filtered water | Premium and uncluttered kitchens |
| Reverse Osmosis | More specialised drinking-water treatment | More equipment, servicing and cupboard space | Premium point-of-use filtration |
Dedicated Filter Tap vs 3-Way Kitchen Mixer
One of the main decisions with an under-sink filter is how the filtered water will be delivered at the kitchen sink.
| Feature | Dedicated Filter Tap | 3-Way Kitchen Mixer |
|---|---|---|
| Number of fixtures | Main mixer plus separate filter tap | One combined mixer |
| Filtered-water pathway | Separate drinking-water tap | Separate filtered pathway inside compatible mixer |
| Kitchen appearance | Two visible fixtures | Cleaner single-tap appearance |
| Existing mixer | Can normally remain in place | Main mixer is replaced |
| Bench / sink opening | Additional tap position generally required | Can use the main mixer position where suitable |
| Best suited to | Simple retrofit installations | Renovations and premium kitchen upgrades |
Standard Under Sink Filter vs Reverse Osmosis
Reverse osmosis is an under-sink filtration technology, but it performs a different job from a conventional cartridge filter and deserves to be compared separately.
| Feature | Standard Under Sink Filter | Reverse Osmosis |
|---|---|---|
| Treatment method | Cartridge filtration | Pre-filtration plus RO membrane treatment |
| Installation size | Usually more compact | Generally requires more cupboard space |
| Water production | Filtered as water passes through | Depends on RO system design |
| Wastewater | Normally no reject-water stream | RO systems produce a reject-water stream |
| Servicing | Cartridge replacement | Pre-filters plus membrane and other service components |
| Best suited to | General drinking-water filtration | More specialised drinking-water treatment |
Under Sink vs Whole House Water Filtration
The main difference is how much of the home's water is treated. Under-sink filtration focuses on drinking water at one outlet, while whole-house filtration treats water entering the broader property.
| Feature | Under Sink Filter | Whole House Filter |
|---|---|---|
| Water treated | Dedicated drinking-water outlet | Multiple household outlets |
| Installation position | Kitchen cabinet | Incoming household water supply |
| Required flow | Lower drinking-water flow | High household flow |
| Showers & bathrooms | Not treated | Can receive filtered water |
| Installation size | Compact | Larger external or service-area equipment |
| Best suited to | Drinking and cooking water | Whole-property filtration |
How to Choose an Under Sink Water Filter
Under-sink systems can look similar while using different cartridges, filtration technologies and replacement systems. Compare the complete ownership experience rather than only the purchase price.
Filtration Technology
Start with what the cartridge or treatment system is designed to do rather than simply comparing the number of filter stages.
Verified Performance
Where a particular contaminant or treatment claim matters, check the actual product performance and relevant independent certification or verification rather than assuming all filters are equivalent.
Cartridge Availability
Replacement filters should be readily available so the system remains practical to own and service over the long term.
Replacement Cost
The ongoing price of cartridges can matter more over the life of the system than a small difference in initial purchase price.
Available Cabinet Space
Measure usable space rather than total cupboard size. Waste pipes, bins, dishwasher hoses and storage can reduce the practical installation area.
Tap Arrangement
Decide whether you want a dedicated drinking-water tap or a 3-way mixer before finalising the filtration installation.
How Much Space Does an Under Sink Water Filter Need?
Required space depends on the filtration system. Compact single-cartridge filters need relatively little room, while larger multi-stage and reverse osmosis systems require more cabinet space.
The important measurement is the usable area after allowing for the sink bowl, waste trap, water connections, dishwasher plumbing, bins and items already stored in the cupboard.
Installation Space Should Allow For:
- The complete filter housing or cartridge system.
- Cartridge removal and replacement.
- Water supply connections.
- Filtered-water tubing.
- Waste pipe and trap clearance.
- Existing dishwasher connections.
- RO equipment where applicable.
- Easy isolation and future servicing.
How Much Water Flow Does an Under Sink Filter Need?
An under-sink drinking-water system does not need to supply showers or several fixtures at once, so its flow requirement is much lower than a whole-house filter.
The ideal filtered-water flow should still be practical for everyday use such as:
- Filling drinking glasses.
- Filling reusable bottles.
- Cooking.
- Tea and coffee.
- Filling kettles.
- Food preparation.
Flow varies with cartridge type, system design, incoming water pressure and the condition of the filter cartridge.
Under Sink Water Filter Installation Brisbane & Gold Coast
JR Gas & Water supplies and installs under-sink water filters throughout Brisbane, the Gold Coast and surrounding South East Queensland areas. Installation depends on the selected filter, available cupboard space, existing plumbing and the filtered-water tap arrangement.
1. Check the Kitchen Cabinet
Confirm usable cupboard space, existing plumbing and the most practical position for the filtration equipment.
2. Confirm the Filter System
Select the filtration type and cartridge configuration that suits the household's drinking-water requirements.
3. Choose the Tap Setup
Confirm whether filtered water will use a dedicated drinking tap or a compatible 3-way kitchen mixer.
4. Connect the Water Supply
Connect the filtration system to the appropriate cold-water supply beneath the sink.
5. Connect the Filtered Outlet
Run the filtered-water line to the dedicated drinking-water tap or filtered channel of the selected mixer.
6. Flush, Test & Commission
Flush the new cartridge as required, test all connections and confirm correct filtered-water flow before completion.
Can an Under Sink Water Filter Be Added to an Existing Kitchen?
Yes. Under-sink filtration is commonly retrofitted into existing kitchens as well as installed during renovations and new builds.
Existing Kitchen
A filter can often be added using the existing cold-water plumbing beneath the sink, provided there is suitable cupboard space and a practical location for the filtered-water outlet.
New Kitchen or Renovation
Planning filtration early allows the tap style, cabinet layout and filter location to be considered together for a cleaner finished installation.
How Much Does an Under Sink Water Filter Cost?
Under-sink water filter cost depends on the filtration technology, cartridge configuration, tap choice and installation requirements.
JR Gas & Water displays current products and installed pricing in the live range above so you can compare actual filtration systems rather than relying on a generic price guide.
What Changes the Installed Price?
- Filter system selected.
- Single-stage versus multi-stage filtration.
- Cartridge technology.
- Dedicated filter tap versus 3-way mixer.
- Existing kitchen plumbing.
- Available cupboard space.
- Replacement or removal of an existing filter.
- Tap or benchtop installation requirements.
- Reverse osmosis equipment where selected.
- Additional plumbing required.
Under Sink Water Filter Maintenance & Cartridge Replacement
Under-sink filter cartridges are consumable components and require periodic replacement. The filter head, housing, tap and plumbing can remain in service much longer than the cartridge itself.
Replacement timing depends on:
- Cartridge type.
- Rated capacity.
- Household drinking-water use.
- Incoming water conditions.
- Filter media.
- Water pressure and flow.
- Manufacturer servicing requirements.
Signs that should prompt the system to be checked can include an overdue service interval, noticeable reduction in filtered-water flow or other changes in system performance.
Compare water filter replacement cartridges →
What We Have Learned From Installing Under Sink Water Filters
Cartridge Media Matters More Than Stage Count
Two correctly selected filtration stages can be more useful than a larger system containing cartridges that do not match the homeowner's actual goal.
Cabinet Space Disappears Quickly
Waste pipes, bins, dishwasher hoses and storage can make a large kitchen cabinet much smaller in practical terms.
The Tap Choice Changes the Installation
A dedicated filter tap and 3-way mixer require different planning at the sink and should be chosen before installation starts.
Replacement Cartridges Matter
A filtration system is much easier to own when compatible cartridges remain readily available and straightforward to replace.
More Treatment Is Not Always Necessary
A household should choose the filtration technology it actually needs rather than automatically selecting the most complex system available.
Service Access Is Important
The system needs enough clearance to replace cartridges without removing waste pipes, shelves or other kitchen components.
Common Under Sink Water Filter Mistakes
Buying by Stage Count Alone
Three cartridges are not automatically better than one or two. What each cartridge actually does matters more.
Ignoring Replacement Cartridge Cost
The long-term cost of cartridges can outweigh a small saving on the original filter system.
Not Checking Cupboard Space
A filter should fit with enough clearance to service it, not just squeeze into the available opening.
Choosing the Tap Too Late
A dedicated filter tap and 3-way mixer affect the sink and benchtop layout differently.
Automatically Choosing Reverse Osmosis
RO is useful where its treatment capability is wanted, but it is not automatically the best fit for every household.
Forgetting Cartridge Servicing
Filtration performance and water flow depend on maintaining the consumable components inside the system.
Under Sink Water Filters Brisbane & Gold Coast
Under Sink Water Filters Brisbane
JR Gas & Water supplies and installs under-sink drinking-water filtration throughout Greater Brisbane, Logan, Ipswich, Redlands, Moreton Bay, Scenic Rim and surrounding areas.
We can compare filtration type, cupboard space, replacement cartridges and the best tap arrangement for the existing kitchen.
Under Sink Water Filters Gold Coast
JR Gas & Water installs kitchen and under-bench water filtration throughout the Gold Coast, including standard cartridge filters, premium drinking-water systems and filtration paired with 3-way mixers.
The right system depends on the treatment required, kitchen layout and how the household wants to use filtered water.
Under Sink Water Filter FAQs
What is an under sink water filter?
An under-sink water filter is a point-of-use filtration system installed beneath the kitchen sink or nearby cabinetry. It filters water specifically for a drinking-water outlet rather than treating the complete household water supply.
What is the best under sink water filter?
There is no single best system for every kitchen. The right filter depends on the treatment required, available cupboard space, desired water flow, cartridge availability, replacement cost and whether filtered water will use a dedicated tap or 3-way mixer.
Are under sink water filters worth it?
They can be a very practical option where the main goal is filtered drinking and cooking water. Because only the required drinking water is treated, an under-sink system avoids filtering the much larger volume used by showers, laundry and other household fixtures.
Does an under sink water filter need a separate tap?
Not necessarily. Filtered water can be delivered through a dedicated drinking-water tap or through the separate filtered-water pathway of a compatible 3-way kitchen mixer.
What is a 3-way kitchen mixer?
A 3-way mixer provides standard hot water, standard cold water and filtered drinking water from one tap body while maintaining a separate filtered-water pathway within the fixture.
Is reverse osmosis the same as an under sink water filter?
Reverse osmosis is one type of under-sink drinking-water treatment, but it is more specialised than a conventional cartridge filter. RO uses membrane filtration and normally requires more equipment and servicing.
Is reverse osmosis better than a normal under sink filter?
Not automatically. Reverse osmosis and conventional cartridge filtration perform different treatment roles. The better choice depends on what the household wants the drinking-water system to achieve.
How much cupboard space does an under sink filter need?
Space requirements depend on the system. Compact cartridge filters can use relatively little room, while multi-stage and reverse-osmosis systems require more space. Clearance for future cartridge replacement also needs to be allowed.
Can an under sink water filter be added to an existing kitchen?
Yes. Under-sink filters are commonly retrofitted into existing kitchens provided there is suitable cabinet space, access to the cold-water supply and a practical filtered-water tap or mixer arrangement.
What is the difference between under sink and whole-house filtration?
Under-sink filtration treats water at a dedicated drinking-water outlet. Whole-house filtration is installed on the incoming household supply and is designed to treat water for multiple fixtures throughout the property.
Can I have an under sink filter and whole-house filtration?
Yes. A whole-house system can provide broader filtration throughout the property while a separate under-sink system provides a different or more specialised level of treatment for drinking and cooking water.
How often should an under sink water filter be changed?
Cartridge replacement frequency depends on the filter type, rated capacity, water usage, incoming water conditions and manufacturer requirements. There is no single replacement interval that applies to every under-sink system.
Why has my filtered-water flow slowed down?
Reduced flow can have several causes, including a loaded filter cartridge, incoming pressure, the filtration technology or another restriction in the system. If the filter is due for servicing, the cartridge should be checked.
Do you install under sink water filters in Brisbane and Gold Coast?
Yes. JR Gas & Water supplies and installs under-sink drinking-water filtration throughout Greater Brisbane, the Gold Coast, Logan, Ipswich, Redlands, Moreton Bay, Scenic Rim and surrounding South East Queensland areas.
Compare Drinking & Home Water Filtration
Under-sink filtration is one part of the broader home water-filtration range. Compare the related categories below if you are deciding between filtration technologies or how much of the property you want to treat.
Choose the Right Under Sink Water Filter
Compare under-sink drinking-water filtration systems with current products and installed pricing above. If you are unsure which filtration technology, cartridge setup or filtered-water tap arrangement suits your kitchen, use the under-sink filter selector or book an onsite quote inspection before choosing your system.
