Legacy Undersink Replacement Filter Pack (older systems)

• Complete replacement pack:
  Includes the cartridges needed for your
  selected earlier-generation undersink system.
• Complementary filtration:
  Combines electropositive nanofiber technology
  with two premium carbon block filters.
• Fine particle filtration:
  Advanced nanofiber media are designed
  to capture bacteria, viruses, cysts,
  and ultrafine particles.
• Improved taste and odor:
  Carbon block filtration helps reduce
  chlorine and other substances that
  affect drinking water quality.
• Multiple housing options:
  Replacement configurations for stainless
  steel, white, and clear housings.
• Optional mineral cartridge:
  Available for systems already equipped
  with an inline mineral cartridge.
• Convenient maintenance:
  Recommended replacement approximately
  every 6–12 months, depending on
  water quality and household usage.

Use the product dropdown menus above
to select the two options that match
your existing undersink system.

1. Select Your Housing Type

• Stainless Steel Housings
• White Housings
• Clear Housings

Choose the housing style currently
installed beneath your sink.
Different housing styles may use
different replacement cartridge configurations.

2. Select Your System Configuration

• Standard:
  For systems without an inline mineral cartridge.
• Includes Inline Mineral Cartridge:
  For systems equipped with the additional
  inline mineral cartridge.

If you’re unsure which options to select,
please contact us before ordering.
A photo of your existing system is often
all we need to help identify the correct pack.

Your replacement pack includes the
appropriate cartridges for the housing
type and system configuration selected.

Standard Replacement Pack

• 1 Advanced Electropositive Nanofiber Cartridge:
  Designed to capture bacteria, viruses,
  cysts, and ultrafine particles while
  maintaining strong water flow.
• 2 Premium Carbon Block Cartridges:
  High-quality activated carbon filtration
  for chlorine reduction, improved taste
  and odor, and additional contaminant reduction.

Replacement Pack with Mineral Cartridge

• 1 Advanced Electropositive Nanofiber Cartridge
• 2 Premium Carbon Block Cartridges
• 1 Inline Mineral Cartridge

The mineral cartridge is included only
when the corresponding system option
is selected.

These replacement packs combine
electropositive nanofiber filtration
with premium activated carbon block
technology to provide complementary
contaminant reduction.

Electropositive Nanofiber Filtration

Specialized filtration media use
electropositive attraction to capture
bacteria, viruses, cysts, and extremely
fine particles while maintaining
high flow and low pressure drop.

Carbon Block Filtration

Two premium activated carbon block
cartridges help reduce chlorine,
improve taste and odor, and provide
additional contaminant reduction.

Performance can vary depending on
incoming water quality, contaminant
concentrations, flow rate, and
household operating conditions.

Explore the available filtration
documentation below.

Nanofiber Performance Data

Carbon Block Performance Data

We recommend replacing your undersink
filtration cartridges approximately
every 6–12 months
to maintain optimal performance.

Actual replacement frequency depends
on household size, water consumption,
incoming water quality, and
sediment levels.

Larger households or homes with
higher water consumption may 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.

Our replacement and sanitization
guides are available to help
you maintain your earlier-generation
Greenfield undersink system.

Replacement Guide (PDF)

Sanitization Guide (PDF)

Questions about housing compatibility,
filter replacement, or maintenance?
Our team is happy to help you
find the correct replacement pack.