4-Stage Reverse Osmosis Water Filter, Sydney

Pure Neutral
Reverse Osmosis Filter

A four-stage under-sink reverse osmosis system with a calcium remineralising post-filter. Removes fluoride, chloramine, heavy metals and microplastics, then restores mineral balance for a clean drink at a neutral pH of around 7 to 8. Supplied and installed by Jean-Paul, Sydney's licensed water filter plumber.

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Installation Included Lifetime Workmanship Guarantee 12-Month System Warranty Licensed Plumber 461511C WaterMark & NSF Certified
Call 0430 546 749 Get a Fixed Quote
5.0 Google Rating
9 verified reviews
Licensed & Insured
Lic. 461511C NSW
WaterMark & NSF Certified
Australian standard systems
Fixed Price Guaranteed
No upsells on the day
Lifetime Warranty
On all workmanship
Reverse osmosis system installed under Sydney kitchen sink
Jean-Paul connecting RO water lines under kitchen sink Sydney
4-stage reverse osmosis filter installation Sydney home
Licensed plumber completing RO filter installation Sydney
Model GT1-26-4SCC · 4-Stage RO + pH Neutral

Pure Neutral Water Filter

Four stages of precision reverse osmosis remove up to 98% of dissolved contaminants, then a calcium remineralising post-filter restores mineral balance and lifts the water to a clean, neutral pH of around 7 to 8 on demand.

$820
Supply + professional installation. Fixed price, no call-out fees, no surprises.
Chrome filter tap included
12L tank included
$180/yr DIY
  • Removes up to 98% of dissolved contaminants
  • Fluoride reduction up to 98% via RO membrane
  • Removes chloramine, heavy metals & microplastics
  • Calcium remineralising post-filter, balanced pH 7 to 8
  • 50 GPD high-efficiency RO membrane (NSF/ANSI 58 tested)
  • 12L storage tank, water available on demand
  • WaterMark certified, AS 3497, Certificate 23247
Book Installation Get a Quote

Tap Options

A dedicated chrome filter tap is installed as standard, through your benchtop or sink. Prefer a cleaner look? A 3-way mixer tap upgrade is available on request, combining hot/cold and filtered water into one premium fixture. No extra hole required.

About The System

Balanced, Neutral pH Water From Your Kitchen Tap

Sydney's mains water is treated and safe by regulatory standards, but it arrives at your tap containing chloramine, fluoride, trace heavy metals, and in some areas nitrates and PFAS. For households that cook, brew coffee, and drink directly from the tap every day, reverse osmosis is the most comprehensive solution available for residential use.

The Pure Neutral uses a 50 GPD high-efficiency RO membrane to reject up to 98% of dissolved solids at the molecular level, including fluoride, chloramine, lead, copper, arsenic, nitrates, PFAS and microplastics. Stages 1 and 2, a 5-micron sediment cartridge and a 100% coconut carbon block, pre-treat the feed water and protect the membrane from chlorine and particles. The final stage is a dual finishing cartridge: activated coconut carbon polishes the taste, then calcite (calcium carbonate) media restores a measured amount of calcium and lifts the water to a balanced, neutral pH of around 7 to 8, without making it hard.

The result is clean, great-tasting water that sits at a comfortable neutral pH rather than the higher pH of an alkaline system. If you would prefer a higher alkaline pH with added magnesium and potassium, the Pure Plus+ uses a full alkaline remineralisation blend instead, and the Pure Balance leaves the water pure and mineral-free.

The 12-litre storage tank ensures water is always available on demand, no waiting for filtration to complete before you can fill a glass. The dedicated chrome filter tap is installed through your benchtop, and a 3-way mixer tap upgrade is available if you'd prefer one fixture over two.

Jean-Paul installs every Pure Neutral system personally across Sydney. He's a licensed NSW plumber (Lic. 461511C), not a subcontractor, every installation is done by the same person who answers the phone. Fixed price of $820 covers system, tank, chrome filter tap, all fittings, and licensed installation. No hidden extras.

High Performance Filtration Filter Systems Australia
Genuine HPF & FSA Technology

This system uses High Performance Filtration (HPF) filter cartridges and Filter Systems Australia (FSA) system housings, Australian-owned brands, Gold Coast QLD. Jean-Paul is Sydney's authorised installer for both brands.

Filter Stage Breakdown

Four stages work in sequence to deliver clean, balanced, neutral pH water. Each stage has a specific role, from protecting the membrane to restoring mineral balance.

1
GT2-2K
5-Micron Polyspun Sediment Filter
Pre-filter, Sediment, Particles, Silt
The first stage is a 5-micron melt-blown polypropylene sediment cartridge that removes physical particles from the feed water, sand, silt, rust, and suspended solids. Its primary job is to protect the coconut carbon pre-filter and the RO membrane from clogging, extending their life and maintaining flow performance. Replaced every 6 months in Sydney's mains water conditions.
SedimentSiltRust particlesMembrane protection
2
GT4-7CTO
Coconut Carbon Block Pre-Filter
Pre-filter, Chlorine, Chloramine, Taste & Odour
A 5-micron 100% coconut carbon block pre-filter. Its dense carbon matrix takes the first hit, adsorbing chlorine, which is particularly damaging to the RO membrane, along with VOCs, herbicides, pesticides and chemical taste and odour. Keeping this filter fresh is crucial to protecting everything downstream. Replaced every 6 months.
ChloramineChlorineVOCsMembrane protection
3
GT13-59
50 GPD RO Membrane
Primary filter, 0.0001 micron, up to 98% TDS rejection
The heart of the system. This reverse osmosis membrane operates at 0.0001 microns, fine enough to reject up to 98% of dissolved contaminants including fluoride, lead, copper, arsenic, nitrates, PFAS, bacteria and cysts. It produces up to 190 litres of filtered water per day. Water molecules pass through; dissolved solids are flushed to drain. Typically replaced every 2 to 4 years depending on water quality.
FluorideHeavy metalsNitratesPFASBacteria
4
GT6-18LS
Calcium Alkalising / Coconut Carbon Post-Filter
Post-filter, pH 7 to 8, calcium restored
The final stage is a dual finishing cartridge. Activated coconut carbon polishes the water to a clean, naturally sweet taste, then it passes through calcite (calcium carbonate) media that restores a measured amount of calcium and buffers the pH to a balanced, neutral 7 to 8, without making the water hard. A new cartridge may read slightly higher than pH 8 at first, but it settles quickly. Replaced every 12 months.
Neutral pHCalciumCalciteTaste polish
System Specifications

Technical Specifications

Full technical data for the Pure Neutral GT1-26-4SCC system as supplied and installed in Sydney.

SpecificationValue
System ModelGT1-26-4SCC (Pure Neutral)
Filtration Stages4 (Sediment + Coconut Carbon Block + RO Membrane + Calcium Alkalising / Coconut Carbon Post-Filter)
RO Membrane Output50 GPD (approximately 190 litres/day)
RO Membrane Type0.0001 micron, NSF/ANSI 58 tested
TDS RejectionUp to 98%
Fluoride ReductionUp to 98%
Output pHApproximately 7–8 (calcium remineralisation stage)
Storage Tank CapacityApproximately 12L
Pre-filter Service Interval6 months (sediment + coconut carbon)
RO Membrane Service Interval2–4 years
Post-filter Service Interval12 months (calcium / coconut carbon)
WaterMark CertificationAS 3497, Certificate 23247
ManufacturerFilter Systems Australia (FSA)
Supply StandardMains / town water only
Annual Service (professional)$380/yr (includes labour + all filters)
Annual Service (DIY)$180/yr cartridges
Pre-Filter Service (every 6 months)$220 professional / $70 DIY
Licensed Plumber

Installed by Jean-Paul

Every Pure Neutral is installed by Jean-Paul Barbar, a licensed plumber, not a contractor. Neat, clean work across homes and apartments throughout Sydney.

Fixed Pricing

What You Pay

No call-out fees. No hidden extras. System, tank, chrome tap, all fittings, and licensed installation, one fixed price.

SUPPLY + INSTALL
Pure Neutral, Installed
$820
One fixed price. Everything included.
  • Pure Neutral GT1-26-4SCC system (4 stages)
  • ~12L pressurised storage tank
  • Dedicated chrome filter tap
  • All fittings and connections
  • Licensed installation by Jean-Paul
  • Lifetime workmanship guarantee
Annual Service, Professional
$380/yr
Jean-Paul attends, replaces all annual cartridges and checks all fittings. Pre-filter service runs $220 every 6 months.
  • Sediment + CTO carbon pre-filters replaced
  • Calcium alkalising / coconut carbon post-filter replaced
  • All connections checked and pressure-tested
  • System flushed and performance confirmed
Annual Service, DIY
$180/yr
Replace annual cartridges yourself. Pre-filter and membrane swap every 6 months is an extra cost.
  • Standard push-fit pre/post filter cartridges
  • No specialist tools required for pre/post filters
  • RO membrane: book a service call every 2–3 yrs
  • Lowest ongoing cost for confident DIYers
Common Questions

Frequently Asked Questions

Yes. Reverse osmosis is one of the only residential filtration technologies proven to reduce fluoride effectively, removing up to 98% in a properly maintained system. Standard carbon and sediment filters cannot remove fluoride, which is a dissolved mineral salt that passes straight through most media. The RO membrane in the Pure Neutral operates at 0.0001 microns, fine enough to reject fluoride ions along with the bulk of other dissolved solids.
Water leaving an RO membrane is highly purified but slightly acidic and stripped of minerals. The Pure Neutral finishes with a dual post-filter that first polishes the water through activated coconut carbon, then passes it through calcite (calcium carbonate) media. This restores a measured amount of calcium and lifts the water to a balanced, neutral pH of approximately 7 to 8 without making it hard. A new cartridge may read slightly higher than pH 8 at first, but it settles quickly.
A standard 4-stage reverse osmosis installation typically takes around 2 hours. Jean-Paul connects the system to your cold water supply, mounts the storage tank, drills a dedicated hole in your benchtop for the filter tap, and runs the drain line to your waste pipe. He walks you through the system before leaving, including how to change cartridges and when to schedule the next service.
The sediment and coconut carbon pre-filters are replaced every 6 months to protect the RO membrane. The dual calcium alkalising / coconut carbon post-filter is replaced every 12 months. The RO membrane lasts 2 to 4 years depending on your water quality and is checked at every service. Jean-Paul's annual service is $380 including all annual cartridges and labour, or DIY cartridges are $180 per year. Pre-filter service every 6 months is $220 professional or $70 DIY.
RO systems do produce some wastewater, typically 2 to 4 litres of drain water per litre of filtered output, depending on membrane quality and water pressure. This is an inherent characteristic of the reverse osmosis process. For a typical Sydney household drawing a few litres per day from the filter tap, the additional water usage is modest.
The RO membrane (0.0001 microns) rejects up to 98% of dissolved solids including fluoride, chloramine, chlorine, heavy metals such as lead, copper and arsenic, nitrates, PFAS, microplastics, bacteria and cysts. The coconut carbon block pre-filter protects the membrane by removing chlorine and chemical taste and odour, and the calcium alkalising post-filter restores mineral balance and a neutral pH before the water reaches your glass.
Both add minerals back after reverse osmosis. The Pure Neutral is a 4-stage system that uses a calcium calcite post-filter to lift the water to a balanced, neutral pH of around 7 to 8. The Pure Plus+ is a 5-stage system that uses an alkaline remineralisation blend of calcium, magnesium and potassium to reach a higher pH of around 7.5 to 8.5. Pure Neutral is the simpler, lower-priced option for a clean, naturally balanced drink.
Compare Systems

Other Water Filter Systems

Not sure if the Pure Neutral is right for you? Browse the full range, every system includes professional installation by Jean-Paul.

Pure Essential
$550
Twin-stage carbon filter. Removes chloramine, chlorine and VOCs. Full mains pressure, no RO required. Entry-level solution for Sydney mains water.
View Pure Essential
Pure Premium
$1,180
7-stage RO + alkaline + magnesium + hydrogen-rich + far infrared ceramic. The ultimate under-sink water experience, antioxidant, high-pH, and mineral-rich.
View Pure Premium
Pure Home
$3,150
Whole-house HPF-3 system. Filters every tap, shower and appliance in the home. Complete protection for families wanting clean water from every outlet.
View Pure Home
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Ready to Get Cleaner Water?

Book your Pure Neutral installation or get a fixed price quote. Jean-Paul covers greater Sydney, same week appointments available.

0430 546 749
Mon–Sat 7am–6pm · No call-out fee · Fixed price
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