PureSync Original Undersink Water Filtration System

Price range: $1,119.99 through $1,211.99

PureSync Original Undersink Water Filtration System
combines four complementary filtration stages to reduce
a broad range of unwanted contaminants while preserving
naturally occurring beneficial minerals.

Featuring electropositive nanofiber technology,
advanced carbon block filtration, and two
additional carbon filtration stages,
PureSync Original is designed to address
chlorine, chloramine, lead, PFAS, fluoride,
VOCs, cysts, and other unwanted substances
in drinking water.

Built with premium Italian and American-made
components, the system installs beneath your
sink and connects to either your existing
cold-water line or the included stainless-steel
drinking water spigot. No electricity or
wastewater discharge required.


Due to high demand, this product is currently
available on backorder. Please contact us
for an estimated shipping timeline.

Key Benefits
  • Four-stage filtration:
    Combines electropositive nanofiber technology,
    advanced carbon block filtration, additional
    carbon treatment, and final polishing.
  • Broad contaminant reduction:
    Designed to address chlorine, chloramine,
    lead, mercury, PFOA/PFOS, fluoride, VOCs,
    and certain emerging contaminants.
  • Fine particulate filtration:
    Complementary filtration technologies
    help capture ultrafine particles,
    microplastics, and certain cysts.
  • Improved taste and odor:
    Multiple carbon filtration stages
    reduce chlorine and other substances
    that affect drinking water’s
    taste and smell.
  • Flexible installation:
    Connects to your existing cold-water line
    or the included stainless-steel spigot.
  • Strong water flow:
    Designed for effective filtration
    without unnecessary pressure loss.
  • Mineral preservation:
    Maintains naturally occurring calcium,
    magnesium, and other dissolved minerals.
  • Efficient operation:
    No electricity or wastewater discharge.
  • Convenient maintenance:
    Recommended filter replacement every
    6–12 months, depending on household
    size, usage, and water quality.
How the Four Stages Work

Stage 1 — Electropositive Nanofiber Filtration

Advanced electropositive filtration technology
designed to capture bacteria, viruses, cysts,
and ultrafine particles while maintaining
strong water flow.

Stage 2 — Advanced Carbon Block Filtration

A premium American-made carbon block
manufactured with 100% coconut shell
activated carbon. Its 0.5-micron nominal
filtration rating provides fine particulate
filtration alongside broad chemical
contaminant reduction.

This stage is designed to reduce chlorine,
chloramine, lead, mercury, volatile organic
compounds (VOCs), PFOA/PFOS, and certain
emerging contaminants, including pharmaceuticals.

It also provides mechanical reduction
of microplastics and certain cysts,
including Cryptosporidium and Giardia.

The combination of high-performance
activated carbon and fine particulate
filtration complements the electropositive
nanofiber stage, contributing to the
system’s broad contaminant-reduction capabilities.

Stage 3 — Carbon Block Filtration

A high-quality activated carbon block
provides additional chlorine reduction
and filtration of substances that affect
water’s taste and odor.

Stage 4 — Final Carbon Polishing

A final carbon filtration stage provides
additional polishing to refine drinking
water’s taste and odor.

Together, the four stages provide
comprehensive drinking water filtration
while retaining naturally occurring
dissolved minerals.

Filter Performance & Testing

PureSync Original combines multiple filtration
technologies selected for complementary
contaminant reduction.

The advanced carbon block used in Stage 2
has performance data validated through
internal testing and independent
third-party laboratories.

Its materials are certified by NSF International
to NSF/ANSI Standard 42 material requirements.
Contaminant-reduction performance is
documented separately from this certification.

Manufacturer testing provides valuable
information about filtration capabilities
under defined conditions. Actual performance
and service life can vary depending on
incoming water quality, contaminant
concentrations, flow rate, household
usage, and other operating conditions.

Explore the technical documentation
and performance information for
each filtration stage below.


Stage 1 — Nanofiber Performance Data


Stage 2 — Advanced Carbon Block Performance Data


Stage 3 — Carbon Block Performance Data


Stage 4 — Carbon Polishing Performance Data

System Specifications
  • Filtration:
    Four complementary stages
  • Dimensions:
    19″ L × 6″ D × 19.5″ H
  • Components:
    Food-grade housings and cartridges
  • Stage 1:
    Electropositive nanofiber filtration
  • Stage 2:
    Advanced coconut shell carbon block,
    0.5 micron nominal
  • Stage 3:
    Activated carbon block filtration
  • Stage 4:
    Final carbon polishing
  • Installation:
    Cold-water line or dedicated
    stainless-steel drinking water spigot
  • Power:
    None required
  • Wastewater:
    None
  • Filter replacement:
    Recommended every 6–12 months,
    depending on water quality and usage
  • Minerals:
    Naturally occurring calcium, magnesium,
    and other dissolved minerals are retained
Replacement Filters & Maintenance

For optimal performance, we recommend
replacing filters approximately every
6–12 months.

Replacement frequency depends on household
size, water consumption, incoming water
quality, and overall system usage.

Larger households or homes with higher
water consumption will often benefit
from replacement closer to every
6–8 months,
while smaller households with lighter
usage may be able to go longer.

These recommendations are based on
our experience supporting Greenfield
filtration systems in real-world
household conditions.

Replacement filter packs are available
for ongoing system maintenance.


Purchase Replacement Filters

Installation Guides & Support

PureSync Original can be connected directly
to your existing cold-water line or installed
with the included stainless-steel drinking
water spigot.


View Installation Guide (PDF)

An optional inline mineralizer is available
for additional mineral enrichment and taste.


Questions about installation, filter
replacement, or selecting the right
filtration system? Our team is
happy to help.

-

Description

Undersink Filtration Comparison

Which PureSync™ Undersink System Is Right for You?

Both PureSync™ undersink systems combine multiple filtration stages backed by third-party component testing. Both retain naturally occurring calcium and magnesium and operate without electricity or wastewater. PureSync Original adds a final carbon polishing stage, while PureSync Lite offers the core filtration stages in a smaller, more affordable system.

FeaturePureSync™ Original UndersinkPureSync Lite™ Undersink
Best ForCustomers wanting our full four-stage system with additional carbon polishingCustomers wanting broad contaminant reduction in a more compact, budget-friendly system
InstallationConnects to cold water line or included stainless steel spigotConnects to cold water line or included stainless steel spigot
Filtration ApproachElectroadsorptive filtration, advanced adsorptive filtration, and carbon filtration, followed by a final carbon polishing stage for additional taste and odor refinementElectroadsorptive filtration, advanced adsorptive filtration, and carbon filtration in a streamlined three-stage system
Contaminants AddressedChlorine, PFAS, VOCs, fluoride, lead, cysts, pharmaceuticals, heavy metals, and moreChlorine, PFAS, VOCs, fluoride, lead, cysts, pharmaceuticals, heavy metals, and more
Flow & OperationDesigned for strong undersink flow with low pressure drop; no electricity or wastewaterDesigned for strong undersink flow with low pressure drop; no electricity or wastewater
System ConfigurationFour stages, including final carbon polishingThree core filtration stages
System Size19″L × 6″D × 19.5″H15″L × 4.5″D × 15″H
MaintenanceReplace filters every 6–12 months, or sooner as needed based on usage and water qualityReplace filters every 6–12 months, or sooner as needed based on usage and water quality
MineralsRetains naturally occurring calcium and magnesium; optional inline mineralizer availableRetains naturally occurring calcium and magnesium; optional inline mineralizer available

Testing and certifications apply to individual filtration components as specified in their documentation. Actual contaminant reduction, flow, and filter life depend on water quality, usage, and maintenance.

Quick Guidance

Choose PureSync™ Original if...

  • You want our full four-stage undersink system
  • You prefer an additional carbon polishing stage for taste and odor refinement
  • You have room for the larger system beneath your sink

Choose PureSync Lite™ if...

  • You want the core filtration stages in a more compact system
  • You have less available space beneath your sink
  • You prefer a more budget-friendly option without the final carbon polishing stage

Still not sure which system is right for your home?

We’re happy to help you choose based on your water quality concerns, installation preferences, and available space.

Contact Us for Help Choosing

Thoughtfully Selected Filtration

Cleaner Water. Naturally.

At Greenfield Water Solutions, we believe good filtration should reduce what doesn’t belong while preserving the naturally occurring minerals in your water.

The PureSync™ Original Undersink System combines four filtration stages to reduce a broad range of contaminants, including chlorine, lead, fluoride, PFAS, VOCs, cysts, and pharmaceuticals. Its filtration components are backed by third-party laboratory testing.

Built with premium Italian-made housings and American-made filtration technology, PureSync reflects our commitment to quality materials and established, reputable suppliers. We carefully evaluate the components we offer and refine our lineup as filtration technology advances.

PureSync operates without electricity or wastewater and retains naturally occurring calcium and magnesium. An optional inline mineralizer is available for those who prefer added minerals or enhanced taste.

Our team helps you choose the right filtration for your water and provides ongoing guidance with installation questions, maintenance, and replacement filters. For well water, we recommend reviewing a recent water test to determine whether additional treatment is needed.

Testing and certifications apply to individual components as specified in their documentation. Actual performance and filter life depend on water quality, flow rate, usage, and maintenance.

 

Confidence Through Transparency

Filtration Backed by Science

Knowing how your water filter performs matters. The PureSync™ Undersink System combines carefully selected filtration components backed by third-party laboratory testing for contaminant reduction.

Each stage has a specific role in reducing unwanted substances, including chlorine, lead, VOCs, fluoride, PFAS, and more. We share component data sheets and testing summaries so you can understand the technology behind your system and make an informed choice.

Our commitment extends beyond your purchase, with ongoing support to help you maintain your system and keep it performing as intended.

Testing and certifications apply to individual components and the specific requirements identified in their documentation. Actual performance and filter life depend on water quality, flow rate, usage, and maintenance.

The PureSync™ Original Undersink System combines four complementary filtration stages to reduce unwanted contaminants while retaining naturally occurring calcium and magnesium. Each stage plays a specific role, from capturing fine particles to reducing chemical contaminants and refining taste and odor.

 

Inside Your PureSync System

Four Stages of Thoughtful Filtration

PureSync™ Original combines electroadsorptive, adsorptive, and carbon filtration to reduce unwanted contaminants while retaining naturally occurring calcium and magnesium.

Stage 1

Electroadsorptive Filtration

An electropositive filter attracts and captures fine particles, including cysts and other particulate contaminants. This technology captures particles smaller than its physical pore size while supporting strong water flow.

Stage 2

Advanced Adsorptive Filtration

Specialized filtration media targets PFAS, fluoride, heavy metals, pharmaceuticals, and other chemical contaminants, adding broad contaminant reduction to the system.

Stage 3

Carbon Filtration

A carbon block filter reduces chlorine taste and odor, helping improve the taste of water used for drinking, cooking, coffee, and tea.

Stage 4

Final Carbon Polishing

An inline carbon filter provides an additional polishing stage for taste and odor refinement. This final stage distinguishes PureSync Original from the three-stage PureSync Lite system.

Optional Addition

Inline Mineralization

PureSync is designed to retain naturally occurring calcium and magnesium. For those who prefer additional minerals or a different taste profile, the optional inline mineralizer adds minerals as water passes through. Its effect on mineral levels and pH depends on your source water and usage.

Filtration components are backed by third-party laboratory testing. Testing and certifications apply to the specific components and requirements identified in their documentation. Actual contaminant reduction and filter life depend on water quality, flow rate, usage, and maintenance.

Additional information

Weight24 lbs
Dimensions20 × 9 × 22 in
ADD IN-LINE MINERALIZER

YES, NO

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