Choosing the best under sink water filter is not just about buying the filter with the smallest micron rating, the biggest claims, or the flashiest tap.

The best under sink water filter depends on how your kitchen is used.

Some households want the purest possible drinking water. Some want better tasting water from the existing kitchen mixer. Some want a dedicated filtered water tap. Some want a twin-canister system with more filtration capacity. Some want a 3-in-1 mixer that keeps the kitchen bench clean and avoids adding another tap hole. Some want a simple everyday filter that is easy to service and does not overcomplicate the plumbing.

For JR Gas & Water, the best under sink water filter systems in Australia for 2026 are:

Best for purist drinking water: Puretec RO270
Best for everyday kitchen use: Puretec PureMix Z6
Best combination filter and tap set: Puretec Tripla Range
Best twin-canister under sink system: Puretec TS200
Best dedicated filtered water system: Puretec Z12

JR Gas & Water supplies, installs and services under sink water filter systems across Brisbane, Gold Coast, Logan, Ipswich, Redlands, Moreton Bay, Scenic Rim and nearby South East Queensland areas.

This guide compares the best Puretec under sink water filters by category, explains which system suits which home, and compares Puretec against other common filter brands without naming them directly.

Important Note on Competitor Comparisons

Australia’s under sink water filter market is full of polished Facebook ads, wellness-style drinking water claims, online filter warehouses, reverse osmosis kits, cheap marketplace filter systems, in-home demonstrations and retail house-brand filters.

Some of these systems may suit the right home. Not every competing filter is bad.

However, some companies in the water filtration space are very protective of direct public comparisons, especially when another product is recommended above theirs. To keep this guide focused on useful buying advice rather than brand disputes, JR Gas & Water compares the main competitor types using anonymous labels.

That means this article compares Puretec against:

Brand A: the premium-looking water filter brand that seems to follow you around Facebook, Instagram and YouTube after you search for water filters once

Brand B: the in-home demonstration company that uses quick water tests, colour changes, hardness demos or handheld meters to make tap water look worse than it is

Brand C: the big online filter warehouse with hundreds of cartridges, under sink kits, reverse osmosis systems, benchtop filters and DIY packages

Brand D: the wellness-style water brand focused on alkaline water, mineral claims, luxury drinking water, lifestyle messaging and high-end kitchen language

Brand E: the cheap marketplace under sink filter kit that looks similar to a premium system but may not have the same fittings, compliance, support or long-term cartridge access

Brand F: the lower-cost retail or trade house-brand filter system that is easy to buy today but may not have the same specialist filtration support long term

These labels are not used to attack other businesses. They are used so homeowners can recognise the type of system being compared without turning the article into a brand-name argument.

The real question is not “which filter has the biggest marketing claim?”

The better question is:

Which under sink filter gives the right water for the right use, fits the kitchen properly, is easy to service, uses cartridges that can be sourced later, and still makes sense in five years?

That is where Puretec stands out.

Quick Answer

The best under sink water filter depends on what you want the kitchen filter to do.

For the purest drinking water, start with the Puretec RO270.

For everyday kitchen use through the existing mixer, start with the Puretec PureMix Z6.

For a cleaner kitchen layout with one tap for hot, cold and filtered water, compare the Puretec Tripla Range.

For a dedicated filtered water outlet with stronger twin-canister filtration, compare the Puretec TS200.

For a premium dedicated filtered tap system with simple cartridge servicing, compare the Puretec Z12.

2026 Under Sink Water Filter Awards

The 2026 JR Gas & Water Under Sink Water Filter Awards are based on practical kitchen use, not sales hype.

A good under sink water filter should:

• Improve the water you actually drink and cook with

• Suit the kitchen layout

• Fit under the sink without creating service issues

• Be easy to maintain

• Use cartridges that can be sourced long term

• Avoid unnecessary bench clutter

• Suit the customer’s drinking water goals

• Be installed properly by licensed professionals

• Avoid fear-based water demonstrations

• Avoid locking the homeowner into one supplier forever

How JR Gas & Water Ranked the Best Under Sink Filters

Under sink water filters need to be ranked differently to whole home filters.

A whole home system treats water before it enters the property. An under sink system focuses on the water you drink, cook with and use in the kitchen.

That means the ranking needs to consider:

• Drinking water performance

• Taste and odour improvement

• Filtration level

• Cartridge availability

• Tap style

• Whether a dedicated outlet is required

• Whether the existing mixer can be used

• Whether reverse osmosis is needed

• Under-sink space

• Drain access for RO systems

• Service clearance

• Bench material

• Customer preference for separate taps

• Long-term cartridge cost

• Installation practicality

• Suitability for Brisbane and Gold Coast mains water

The best under sink filter is not automatically the strongest filter on paper.

The best system is the one that matches how the kitchen is used.

Why Puretec Wins for Under Sink Water Filters

Puretec is the preferred brand in this ranking because it offers strong under sink filtration options across every major kitchen need.

Puretec has options for:

• Existing mixer tap filtration

• Dedicated filtered water taps

• Twin-canister filtration

• Reverse osmosis drinking water

• 3-in-1 mixer tap combinations

• Premium kitchen renovations

• Compact under-bench installs

• Service kits and replacement cartridges

That range matters because not every kitchen needs the same system.

Some homeowners want the purest drinking water. Some want convenience. Some want the cleanest bench layout. Some want stronger filtration but do not want reverse osmosis. Some want a dedicated filtered tap. Some do not want another tap hole at all.

Puretec gives JR Gas & Water a proper range to work with instead of forcing every customer into the same package.

The biggest Puretec advantages are:

• Reputable filtration brand

• Strong kitchen filter range

• Reverse osmosis and non-RO options

• Dedicated tap and no-extra-tap options

• Tripla 3-in-1 mixer options

• Replacement cartridges available through plumbing supply pathways

• Good fit for professional plumbing installation

• Serviceable systems

• Strong upgrade path

• Better long-term ownership than many proprietary online systems

A filter is only as good as the cartridge you can get later.

That is one of the biggest reasons Puretec is JR Gas & Water’s preferred under sink filter brand.

Best for Purist Drinking Water: Puretec RO270

The Puretec RO270 is the best under sink water filter for customers who want the purest dedicated drinking water option.

This is the best system in the range for customers who specifically want reverse osmosis.

Reverse osmosis is different from a normal carbon filter. It uses a membrane to reduce many dissolved impurities that standard carbon filters may not reduce as deeply.

Why the Puretec RO270 Ranks First

The RO270 ranks first for purist drinking water because it is designed for customers who want a higher level of drinking water treatment.

It is best suited to concerns such as:

• Fluoride

• PFAS

• Heavy metals

• Dissolved impurities

• Salts

• Nitrate

• Chlorine

• Taste and odour

• Chemicals

• Dedicated drinking water quality

The RO270 is not trying to be the simplest everyday filter.

It is the system for customers who say:

“I want the cleanest drinking water option at the kitchen.”

Who Should Choose the RO270?

The Puretec RO270 may suit:

• Health-conscious households

• Customers concerned about fluoride

• Customers concerned about PFAS

• Customers concerned about heavy metals

• Families wanting dedicated drinking water

• Customers who currently buy bottled water

• Homes wanting a dedicated RO tap

• Coffee and tea drinkers who want lower dissolved impurities

• Customers wanting stronger filtration than a standard carbon filter

• Brisbane and Gold Coast homes wanting premium drinking water treatment

What to Know Before Choosing RO

Reverse osmosis is excellent for drinking water, but it should be chosen with the right expectations.

RO systems usually require:

• Under-sink space

• A dedicated filtered water tap

• A storage tank

• A drain connection

• Cartridge changes

• Membrane servicing

• Proper installation

• Space for future servicing

RO is not usually the best choice if the customer simply wants fast filtered water through the main kitchen mixer. For that, the Z6 or Tripla range may be better.

RO is best when the customer wants the strongest dedicated drinking water option.

RO270 vs Standard Carbon Filters

JR Verdict

The Puretec RO270 is the best under sink water filter for purist drinking water.

It is the top choice for customers who want reverse osmosis and are willing to accept the extra installation and servicing requirements that come with a stronger dedicated drinking water system.

Best for Everyday Use: Puretec PureMix Z6

The Puretec PureMix Z6 is the best under sink filter for everyday kitchen use.

It is the best choice for customers who want filtered water through the existing kitchen mixer without installing a separate filtered water tap.

Why the Z6 Wins Best Everyday Use

The Z6 is practical.

It improves the water most households use all day, without changing the way the kitchen sink works.

It is best for:

• Drinking

• Cooking

• Coffee

• Tea

• Washing fruit and vegetables

• Filling bottles

• Filling kettles

• Pet bowls

• Everyday kitchen tap use

The biggest advantage of the Z6 is convenience.

There is no separate tap to explain. No dedicated drinking faucet to drill into the bench. No RO tank. No RO drain connection. No need to tell the family which tap to use for filtered water.

The existing mixer becomes the filtered water source.

Who Should Choose the Z6?

The Puretec Z6 may suit:

• Families wanting better everyday kitchen water

• Homes that do not want another tap hole

• Rental-friendly style upgrades where suitable

• Kitchens with limited bench space

• Stone benchtops where drilling another tap hole is undesirable

• Customers who mainly want better taste and odour

• Homes wanting a simple premium filter

• Customers who want fast filtered water from the main mixer

• Households that use a lot of water for cooking

Z6 vs RO270

The Z6 and RO270 solve different problems.

Choose the Z6 if you want convenient filtered water from the main kitchen mixer.

Choose the RO270 if you want dedicated reverse osmosis drinking water.

JR Verdict

The Puretec Z6 is the best under sink water filter for everyday use.

It is the first system most households should compare if they want better kitchen water without adding a separate tap or moving into reverse osmosis.

Best Combination Filter and Tap Set: Puretec Tripla Range

The Puretec Tripla Range is the best combination under sink filter and tap set in this ranking.

Tripla systems are designed for customers who want hot, cold and filtered water from one 3-in-1 mixer tap.

This is the best option for kitchens where appearance matters.

Why the Tripla Range Wins Best Combination Set

A Tripla setup solves one of the biggest issues with under sink water filters: tap clutter.

Many under sink filters use a separate filtered water tap. That is fine in some kitchens, but not everyone wants another hole in the sink or stone benchtop.

A Tripla mixer gives a cleaner finish because it combines:

• Hot water

• Cold water

• Filtered water

into one mixer tap.

The filtered water remains separate from the unfiltered mains water inside the tap design, which is important for proper filtered water delivery.

Who Should Choose the Tripla Range?

The Puretec Tripla Range may suit:

• New kitchens

• Kitchen renovations

• Stone benchtops

• Premium homes

• Customers who do not want a separate filtered tap

• Homes wanting a cleaner sink layout

• Customers replacing an old mixer tap anyway

• Customers wanting hot, cold and filtered water in one fixture

• Design-conscious homeowners

• Homes where bench space is limited

Best Tripla Options

Strong Tripla-style choices include:

• Puretec Tripla T3 under bench filter and mixer package

• Puretec Tripla T1 under bench filter and mixer package

• Puretec Tripla T6 under bench filter and mixer package

• Puretec Tripla Elite mixer upgrades in chrome, brushed nickel, brushed gold, gunmetal and matte black options

Tripla vs Z6

Choose Tripla if you want a new tap and a cleaner premium kitchen finish.

Choose Z6 if you want to keep the existing mixer and filter the kitchen water more simply.

Tripla vs Separate Filter Tap

A separate filtered tap can work well, but it adds another fixture to the sink area.

Tripla is better when the customer wants:

• Less clutter

• One mixer

• Premium finish

• Better design integration

• No extra filtered tap beside the main mixer

A separate tap is better when the customer wants:

• Lower cost

• Dedicated filtered water outlet

• No mixer replacement

• A simpler filter-and-faucet package

JR Verdict

The Puretec Tripla Range is the best combination under sink filter and tap set.

It is the strongest option for renovations, premium kitchens and customers who want hot, cold and filtered water from one clean mixer.

Best Twin-Canister Under Sink Filter: Puretec TS200

The Puretec TS200 is the best twin-canister under sink water filter in this ranking.

It is designed for customers who want a dedicated filtered water outlet and a stronger twin-stage setup without moving into reverse osmosis.

Why the TS200 Wins Best Twin Canister

The TS200 is a strong option because it gives customers more filtration capacity than a compact single-cartridge system.

It suits households wanting:

• Dedicated filtered water

• Twin-stage filtration

• Strong taste and odour improvement

• Sediment and chemical reduction

• Longer serviceable filter setup

• A more substantial under sink system

• No reverse osmosis tank

• No RO drain connection

• A dedicated filtered water tap

The TS200 is the system for customers who want more than a basic under sink filter, but do not want the complexity of RO.

Who Should Choose the TS200?

The Puretec TS200 may suit:

• Families wanting dedicated filtered drinking water

• Customers who prefer twin-canister filtration

• Homes with enough under-sink space

• Customers who do not want reverse osmosis

• Customers wanting a dedicated filtered water faucet

• Homes where filter capacity matters

• Customers who want a serious kitchen filter without RO

TS200 vs RO270

Choose TS200 if you want a stronger non-RO dedicated filter.

Choose RO270 if you want reverse osmosis.

TS200 vs Z12

The TS200 is the better choice for customers who want twin-canister filtration.

The Z12 is the better choice for customers who want a premium dedicated tap system with simpler cartridge servicing.

JR Verdict

The Puretec TS200 is the best twin-canister under sink water filter.

It is the best option for customers who want a dedicated filtered water tap and stronger non-RO filtration than a compact inline system.

Best Dedicated Filtered Water System: Puretec Z12

The Puretec Z12 is the best dedicated filtered water system in this ranking.

It is the best choice for customers who want a dedicated filtered tap with premium single-cartridge convenience.

Why the Z12 Wins Best Dedicated Outlet

The Z12 is strong because it gives customers a dedicated filtered water outlet without needing reverse osmosis or a twin-canister setup.

It suits customers who want:

• A dedicated filtered water tap

• A compact under-sink system

• Strong filtration performance

• Simple cartridge replacement

• Premium kitchen drinking water

• No RO drain

• No RO storage tank

• A clean dedicated faucet setup

• Better convenience than bulkier systems

The Z12 is a strong middle ground between simple inline filters and more complex systems.

Who Should Choose the Z12?

The Puretec Z12 may suit:

• Customers wanting a dedicated filtered tap

• Homes with enough bench or sink space for a filtered faucet

• Families wanting better drinking water without RO

• Customers who want simpler servicing than twin canisters

• Homes where the existing mixer should remain unchanged

• Customers who want a premium dedicated filter system

• Kitchens where a separate filtered tap is acceptable

Z12 vs Z6

Choose Z12 if you want a separate dedicated filtered tap.

Choose Z6 if you want filtered water through the existing mixer.

Z12 vs Tripla

Choose Z12 if you want a dedicated filtered tap and want to keep your existing mixer.

Choose Tripla if you want to replace the mixer with one tap that handles hot, cold and filtered water.

JR Verdict

The Puretec Z12 is the best dedicated filtered water system.

It is ideal for customers who want a premium under sink filter with its own filtered water outlet, but do not want reverse osmosis or a larger twin-canister setup.

Full Under Sink Water Filter Rankings 2026

Best Under Sink Filter by Kitchen Type

Best for Pure Drinking Water

Best pick: Puretec RO270

Choose this if the main goal is the strongest dedicated drinking water filtration.

Best for Everyday Family Kitchens

Best pick: Puretec Z6

Choose this if the family wants filtered water from the normal kitchen mixer all day.

Best for Kitchen Renovations

Best pick: Puretec Tripla Range

Choose this if the mixer is being replaced and the customer wants hot, cold and filtered water from one tap.

Best for Stone Benchtops

Best pick: Z6 or Tripla

Choose Z6 if you want to avoid drilling another tap hole. Choose Tripla if the mixer is being upgraded anyway.

Best for Dedicated Filtered Water Tap

Best pick: Puretec Z12

Choose this if the customer wants a separate filtered water outlet without going to RO.

Best for Strong Non-RO Filtration

Best pick: Puretec TS200

Choose this if the customer wants a twin-canister dedicated filter system without the RO tank and drain.

Best for Small Kitchens

Best pick: Puretec Z6 or Z7

Choose these when under-sink space and bench clutter matter.

Best for Customers Replacing Bottled Water

Best pick: Puretec RO270 or Z12

Choose RO270 for the strongest drinking water treatment. Choose Z12 for a simpler dedicated filtered tap.

Puretec vs Other Under Sink Water Filter Brands

There are many under sink filter brands in Australia. Some are good for the right home, and some customers may be happy with them.

The issue is not that every other brand is bad.

The issue is that many competing under sink systems are harder to service, harder to verify, harder to compare, more dependent on sales tactics or more restrictive around replacement cartridges than homeowners realise.

Puretec vs Brand A: The One Always in Your Facebook Feed

Brand A is the polished filter company that keeps appearing in Facebook, Instagram and YouTube ads after you search for water filters.

The ads usually focus on:

• Clean drinking water

• Family health

• Children

• Chlorine

• Bottled water replacement

• Skin and hair

• Lifestyle upgrades

• Premium packages

• Emotional before-and-after messaging

The system may not be bad. Some of these filters may improve taste and odour.

The concern is the sales model.

Before choosing this style of brand, ask:

• Are the replacement cartridges easy to buy through plumbing retailers?

• Can any licensed plumber service it?

• Are the filters proprietary?

• Is annual servicing clearly priced?

• Does it need a service plan?

• Is the system selected for your kitchen or just sold as a package?

• Is it RO, carbon, ultrafiltration or something else?

• What does it actually reduce?

• Can it be maintained in five years?

Puretec wins because it is easier to support through plumbing supply channels, and JR Gas & Water can match the system to the kitchen rather than forcing every customer into the same filter package.

Puretec vs Brand B: The In-Home Water Test Demonstration Company

Brand B uses quick onsite tests to sell water filters.

The salesperson may use a TDS meter, colour-changing drops, hardness reactions or a visual demonstration to make the water look concerning.

These tests can look dramatic, but they are not the same as a proper water quality report.

A quick demo usually does not properly test for:

• PFAS

• Lead

• Bacteria

• Nitrate

• Fluoride

• Heavy metals

• Pesticides

• Chlorine by-products

• True drinking water risk

A TDS reading does not tell you what the dissolved solids are.

A hardness test does not prove the water is unsafe.

A colour change does not prove the filter being sold is the right solution.

JR Gas & Water’s approach is simple:

If the claim matters, test it properly.

For normal Brisbane and Gold Coast mains water, many customers choose under sink filtration for taste, odour, chlorine reduction, better drinking water and convenience.

For serious health-based concerns, bore water, tank water or suspected contamination, proper testing should come before the system is selected.

Puretec wins because it can be recommended as part of a practical filtration plan, not a fear-led demonstration.

Puretec vs Brand C: The Big Online Filter Warehouse

Brand C is the online store with hundreds of cartridges, filter housings, reverse osmosis kits, benchtop filters and spare parts.

These businesses can be useful for experienced buyers.

The problem is that most homeowners do not know exactly what they need.

They may not know whether they should choose:

• Inline carbon filtration

• Ultrafiltration

• Twin-canister filtration

• Reverse osmosis

• Dedicated tap filtration

• A 3-in-1 mixer

• A compact cartridge

• A system with a drain

• A system with a tank

• A system that needs power

• A system that suits stone benchtops

A large product catalogue does not design the correct system for the kitchen.

Puretec wins for JR Gas & Water customers because the system can be matched to the kitchen layout, usage, service access and drinking water goals.

Puretec vs Brand D: The Wellness Water Brand

Brand D sells water through lifestyle language.

The wording often focuses on:

• Alkaline water

• Mineralised water

• Luxury drinking water

• Wellness claims

• Clean living

• Body benefits

• Designer kitchen language

• Premium tapware

Some customers like the taste of these systems. That is fine.

The concern is when wellness language distracts from practical questions.

Ask:

• What does it actually reduce?

• Are the claims backed by testing?

• Are cartridges easy to buy?

• Can a plumber service it?

• Does it use proprietary filters?

• Does it need power?

• Does it need a drain?

• Is it suitable for the kitchen layout?

• Is the annual cost clear?

• Is the customer paying for filtration performance or lifestyle marketing?

Puretec wins because it keeps the focus on filtration performance, cartridge access, tap choice, installation quality and long-term serviceability.

Puretec vs Brand E: The Cheap Marketplace Under Sink Kit

Brand E is the cheap online marketplace filter kit.

It may look attractive because the price is low and the photos look similar to better systems.

The issue is that under sink filters are connected to plumbing inside a cabinet, often near cabinetry, flooring, dishwashers and electrical appliances. A cheap system can become very expensive if it leaks.

Before buying a cheap kit, ask:

• Are the fittings suitable for Australian plumbing?

• Is the system compliant where required?

• Are cartridges easy to buy later?

• Is the housing quality reliable?

• Are push-fit connections suitable?

• Is leak protection included?

• Can a plumber install it?

• What happens if it floods the cabinet?

• Does it reduce flow too much?

• Is there local warranty support?

Puretec wins because it is a proper filtration brand with stronger support, better serviceability and clearer cartridge pathways.

Puretec vs Brand F: The Retail or Trade House-Brand Filter

Brand F is the lower-cost house-brand filter sold through large retail or trade channels.

These systems may suit basic jobs, especially if the customer only wants a cheap taste-and-odour filter.

The concern is long-term consistency.

House-brand ranges can change. Cartridge availability can shift. The system may be available today but unclear in five years.

Before choosing this style of system, ask:

• Will the same cartridges still be available?

• Is it a specialist filtration brand?

• Is it the best system or just the easiest one to buy today?

• Can it be upgraded later?

• Does it have RO, Tripla or twin-canister options?

• Can it match a premium kitchen finish?

• Is service pricing clear?

Puretec wins because it offers a complete under sink range from simple inline filters through to RO, Tripla and twin-canister systems.

Under Sink Filter Types Explained

Inline Existing-Mixer Filters

Best Puretec pick: Z6

These filters connect under the sink and filter water through the existing kitchen mixer.

Best for:

• Everyday use

• No extra tap

• Fast filtered water

• Simple kitchen upgrade

• Kitchens where another tap hole is not wanted

Dedicated Filtered Tap Systems

Best Puretec pick: Z12

These systems use a separate filtered water tap.

Best for:

• Dedicated drinking water

• Keeping filtered and unfiltered water separate

• Customers who do not want to replace the main mixer

• Homes wanting a clear drinking water outlet

Twin-Canister Systems

Best Puretec pick: TS200

These systems use two filter housings or canisters for stronger staged filtration.

Best for:

• Customers wanting more filtration capacity

• Dedicated filtered water

• Non-RO drinking water

• Larger under-sink spaces

Reverse Osmosis Systems

Best Puretec pick: RO270

These systems use RO membrane technology for stronger drinking water treatment.

Best for:

• Purist drinking water

• Fluoride concerns

• PFAS concerns

• Heavy metal concerns

• Dissolved impurity reduction

• Dedicated drinking water outlet

3-in-1 Filtered Mixer Systems

Best Puretec pick: Tripla Range

These systems provide hot, cold and filtered water through one mixer tap.

Best for:

• Kitchen renovations

• Premium homes

• Stone benchtops

• Cleaner sink layout

• Avoiding separate filtered taps

Under Sink Filter Size and Space Guide

Choosing the right system depends heavily on under-sink space.

RO270 vs Z6 vs Tripla vs TS200 vs Z12

Installation Quality Matters

A good under sink filter installed badly can still cause problems.

Under sink installations need careful planning because the system is installed inside cabinetry near stored items, flooring and sometimes power points or dishwashers.

A proper installation should consider:

• Existing mixer type

• Cold water connection

• Space inside the cabinet

• Service clearance

• Cartridge replacement access

• Tap hole location

• Stone benchtop drilling

• Drain access for RO systems

• Storage tank location for RO

• Leak testing

• Pressure suitability

• Water hammer

• Cartridge flushing

• Customer handover

• Future servicing

JR Gas & Water installs under sink filtration systems as plumbers, not just filter sellers.

That matters because even a small leak under a kitchen sink can cause expensive damage.

Service and Cartridge Replacement

Under sink filters are not set and forget.

Depending on the system, servicing may include:

• Inline cartridge replacement

• Twin-canister cartridge replacement

• RO pre-filter replacement

• RO post-filter replacement

• RO membrane replacement

• O-ring checks

• Tap checks

• Flow checks

• Leak checks

• Sanitising

• Tank checks for RO systems

• Drain connection checks

• Cartridge flushing

Puretec’s advantage is that replacement filters are easier to source through normal plumbing supply pathways.

That makes ownership easier and reduces the risk of being locked into one unknown cartridge supplier.

Common Under Sink Filter Buying Mistakes

Choosing RO When Convenience Matters More

RO is excellent for drinking water, but it is not always the best everyday kitchen filter.

If the customer wants fast filtered water from the main mixer, Z6 or Tripla may be better.

Choosing a Simple Filter When RO Is the Real Goal

If the customer is specifically concerned about fluoride, PFAS, heavy metals or dissolved impurities, a standard filter may not be enough.

RO270 is the better comparison.

Forgetting About Tap Layout

Some filters need a separate tap. Some use the existing mixer. Some replace the mixer.

The tap plan should be decided before the filter is ordered.

Ignoring Under-Sink Space

RO systems and twin-canister systems need more space than compact inline filters.

A crowded cabinet may suit Z6 better than RO270 or TS200.

Buying a Cheap Kit Without Thinking About Leaks

Under sink leaks can damage cabinetry and flooring.

Use quality products and professional installation.

Not Checking Replacement Filter Availability

The system needs to be serviceable long term.

If cartridges are hard to source, the filter becomes a problem later.

Buyer Checklist

Before buying an under sink water filter, ask:

• Do I want filtered water from the existing mixer?

• Do I want a dedicated filtered tap?

• Do I want reverse osmosis?

• Do I want hot, cold and filtered from one mixer?

• Is there enough under-sink space?

• Is there a drain connection for RO?

• Is there room for an RO tank?

• Will I need stone benchtop drilling?

• Are cartridges easy to buy?

• Can a plumber service it?

• Is the system proprietary?

• What does it actually reduce?

• What is the annual servicing cost?

• Will it still make sense in five years?

FAQs About the Best Under Sink Water Filters

What is the best under sink water filter in Australia?

The best under sink water filter depends on the goal. The Puretec RO270 is best for purist reverse osmosis drinking water, while the Puretec Z6 is best for everyday kitchen use through the existing mixer.

What is the best under sink filter for everyday use?

The Puretec Z6 is the best everyday under sink filter because it filters water through the existing kitchen mixer without adding a separate tap, RO tank or drain connection.

What is the best under sink reverse osmosis system?

The Puretec RO270 is the best reverse osmosis under sink system in this ranking. It is the strongest choice for dedicated drinking water and dissolved impurity reduction.

What is the best filtered mixer tap system?

The Puretec Tripla Range is the best combination filtered mixer setup because it provides hot, cold and filtered water from one 3-in-1 mixer tap.

What is the best twin-canister under sink filter?

The Puretec TS200 is the best twin-canister under sink filter for customers wanting a dedicated filtered water tap and stronger non-RO filtration.

What is the best dedicated filtered water tap system?

The Puretec Z12 is the best dedicated filtered water tap system in this ranking. It is a premium single-cartridge setup with a dedicated outlet.

Is RO270 better than Z6?

RO270 is better for purist drinking water and reverse osmosis filtration. Z6 is better for everyday convenience through the existing kitchen mixer.

Is Tripla better than a separate filtered tap?

Tripla is better if you want a cleaner kitchen layout with hot, cold and filtered water from one tap. A separate filtered tap is better if you want a lower-cost dedicated outlet and do not want to replace the mixer.

Is TS200 better than Z12?

TS200 is better if you want a twin-canister system. Z12 is better if you want a premium dedicated filtered tap with simpler single-cartridge servicing.

Do under sink filters reduce fluoride?

Standard carbon-style filters are not usually the best option for fluoride reduction. Customers concerned about fluoride should compare reverse osmosis systems such as the Puretec RO270.

Do under sink filters reduce PFAS?

Some filters may help reduce PFAS depending on the cartridge and technology, but reverse osmosis is usually the stronger dedicated drinking water option. The Puretec RO270 is the best pick in this ranking for PFAS-focused drinking water concerns.

Can I keep my existing kitchen mixer?

Yes. The Puretec Z6 is the best choice if you want to keep your existing mixer and filter everyday kitchen water through it.

Do I need a separate tap?

Not always. Z6-style systems can work through the existing mixer. RO270, TS200 and Z12 usually use a dedicated filtered water outlet. Tripla systems combine hot, cold and filtered water into one 3-in-1 mixer.

Who installs under sink water filters in Brisbane and the Gold Coast?

JR Gas & Water supplies, installs and services under sink water filter systems across Brisbane, Gold Coast and nearby South East Queensland areas, including Puretec RO270, Z6, Tripla, TS200 and Z12 systems.

Final Verdict

The best under sink water filter in Australia for 2026 depends on what you want from the kitchen.

The full JR Gas & Water ranking is:

1. Puretec RO270 — best for purist reverse osmosis drinking water

2. Puretec PureMix Z6 — best for everyday kitchen use

3. Puretec Tripla Range — best combination filter and 3-in-1 mixer set

4. Puretec TS200 — best twin-canister under sink system

5. Puretec Z12 — best dedicated filtered water tap system

6. Puretec Z7 — best premium no-extra-tap alternative

7. Puretec TS100 — best lower-step dedicated outlet system

8. Puretec Z2 / X4 — best compact entry Puretec options

For the purest drinking water, start with the Puretec RO270.

For everyday filtered kitchen water, start with the Puretec PureMix Z6.

For the cleanest premium kitchen finish, compare the Puretec Tripla Range.

For twin-canister filtration, compare the Puretec TS200.

For a dedicated filtered tap, compare the Puretec Z12.

Need help choosing the right under sink filter?

JR Gas & Water can compare your kitchen layout, drinking water goals, under-sink space, tap preference and service access. Browse under sink water filter systems or send photos through the JR Gas & Water quote request page for a practical recommendation.