PureSync Original Replacement Filter Pack

• Complete four-stage replacement:
  Includes the filtration cartridges needed
  for your PureSync Original undersink system.
• Broad contaminant reduction:
  Filtration technologies designed to address
  chlorine, chloramine, lead, mercury,
  PFOA/PFOS, VOCs, and
  certain emerging contaminants.
• Fine particulate filtration:
  Advanced filtration media help capture
  ultrafine particles, microplastics,
  and certain cysts.
• Improved taste and odor:
  Multiple carbon filtration stages
  provide effective reduction of chlorine
  and other substances that affect
  drinking water’s taste and smell.
• Mineral preservation:
  Retains naturally occurring calcium,
  magnesium, and other dissolved minerals.
• City and well water applications:
  Designed for use in compatible systems
  serving a variety of household water sources.
• Convenient maintenance:
  Recommended replacement every
  6–12 months, depending on household
  size, usage, and water quality.

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.

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

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

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, these four stages provide
comprehensive filtration while preserving
naturally occurring dissolved minerals.

The PureSync Original replacement pack
combines complementary filtration
technologies selected for broad
contaminant reduction.

The advanced Stage 2 carbon block
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

For optimal performance, we recommend
replacing your PureSync Original 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 reflect our
experience supporting Greenfield
filtration systems in real-world
household conditions.

Replacement instructions are included
with your filter pack to make maintenance
straightforward.

PureSync Original is designed to retain
naturally occurring dissolved minerals,
including calcium and magnesium,
throughout the filtration process.

An optional inline mineralizer is
available for customers who prefer
additional mineral enrichment
or a different taste profile.

Because the filtration system already
retains naturally occurring dissolved
minerals, this add-on is entirely optional.

This four-stage replacement pack is
intended for compatible PureSync Original
undersink filtration systems.

If your system includes an older
copper structuring device or you are
unsure which replacement filters
your system requires, our team
is happy to help identify the
correct configuration.

Filters for Systems With a Structuring Device

Questions about compatibility, installation,
or replacement timing? Contact our team
for personalized assistance.