Reverse Osmosis Filters & Membranes

Membranes, pre-filters, post-filters and complete replacement sets for under-sink reverse osmosis systems.

CFS T33 Inline Carbon Post Filter – 2 Pack – 1/4" FPT – Fits AICRO 43000140
Sold out

CFS T33 Inline Carbon Post Filter – 2 Pack – 1/4" FPT – Fits AICRO 43000140

Replaces AICRO Sold out
$18.00
$15.99

Inline carbon post filter from CFS, a direct replacement for AICRO and 43000140, with 1/4" FPT female threads on both ends. Coconut shell granular ...

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$18.00
$15.99
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CFS Inline Carbon Post Filter – 10 x 2 – 1/4" NPT – Fits GXRTDR, T33, AICRO
Sold out

CFS Inline Carbon Post Filter – 10 x 2 – 1/4" NPT – Fits GXRTDR, T33, AICRO

Replaces GXRTDR Sold out
$11.99
$10.99

CFS inline carbon post filter with granular coconut shell carbon in a 10 x 2 inch inline body. It sits on the outlet of a reverse osmosis system, b...

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$11.99
$10.99
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CFS T33 Inline Carbon Post Filter – 6 Pack – 1/4" FPT – Fits AICRO 43000140
Sold out

CFS T33 Inline Carbon Post Filter – 6 Pack – 1/4" FPT – Fits AICRO 43000140

Replaces AICRO Sold out
$34.00
$30.99

Inline carbon post filter from CFS, a direct replacement for AICRO and 43000140, with 1/4" FPT female threads on both ends. Coconut shell granular ...

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$34.00
$30.99
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CFS Inline Carbon Post Filter – 10" – 1/4" Quick Connect – Fits T33, ICF-10, R200
Sale

CFS Inline Carbon Post Filter – 10" – 1/4" Quick Connect – Fits T33, ICF-10, R200

Replaces R200 In stock
from $11.99

CFS 10" inline carbon post filter with 1/4" quick-connect fittings. Sits between the storage tank and faucet on a reverse osmosis system, where coc...

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from $11.99
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CFS Pre & Post Carbon Filter Cartridges – Fits GE FX12P, FX12M, GXRM10RBL
Sale

CFS Pre & Post Carbon Filter Cartridges – Fits GE FX12P, FX12M, GXRM10RBL

Replaces GE FX12P In stock
from $15.99

CFS pre and post carbon filter cartridge sets with O-rings, compatible with GE FX12P and FX12M cartridges for GXRM10RBL, GXRV10ABL, and PNRV12 reve...

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from $15.99
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CFS Sediment and Carbon Filter Kit – 2 Pack – 1 Micron – Fits 10" RO and Under Sink
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CFS Sediment and Carbon Filter Kit – 2 Pack – 1 Micron – Fits 10" RO and Under Sink

Sold out
$25.22
$22.99

CFS replacement water filter kit with one sediment and one carbon cartridge, rated at 1 micron, compatible with 10" reverse osmosis and under sink ...

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$25.22
$22.99
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CFS Reverse Osmosis Membrane – 50 GPD with Check Valve – Fits 4SV, 5SV, ZeroWaste
Sold out

CFS Reverse Osmosis Membrane – 50 GPD with Check Valve – Fits 4SV, 5SV, ZeroWaste

Replaces 4SV Sold out
$34.99
$31.99

A single CFS 50 GPD thin film composite reverse osmosis membrane with a built-in check valve, for 4SV, 5SV, and ZeroWaste systems. These systems ar...

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$34.99
$31.99
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CFS Replacement RO Filter Set – 4 Pieces – Carbon, Sediment and Inline – Fits AC-30
Sold out

CFS Replacement RO Filter Set – 4 Pieces – Carbon, Sediment and Inline – Fits AC-30

Replaces AC-30 Sold out
$42.92
$38.99

CFS replacement water filter set for AC-30 reverse osmosis systems. The 4-piece set includes carbon block, sediment, and inline cartridges to cover...

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$42.92
$38.99
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CFS RO Prefilter Set – 5 Micron – 10 x 2.5 – Fits FILTER-SET-ES, ROES-50, ROES-75
Sold out

CFS RO Prefilter Set – 5 Micron – 10 x 2.5 – Fits FILTER-SET-ES, ROES-50, ROES-75

Replaces FILTER-SET-ES Sold out
from $18.99

CFS three-piece reverse osmosis prefilter set: one 5 micron sediment filter and two carbon blocks, all standard 10 x 2.5 inch cartridges. The sedim...

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from $18.99
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CFS RO Filter Kit with 75 GPD Membrane – Fits TGI-525 Five Stage Systems
Sold out

CFS RO Filter Kit with 75 GPD Membrane – Fits TGI-525 Five Stage Systems

Replaces TGI-525 Sold out
$59.99
$54.99

Five piece RO kit from CFS with a 75 GPD membrane — the full annual service in one box: one sediment filter, one granular carbon, one carbon block,...

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$59.99
$54.99
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CFS RO Filter Kit with 50 GPD Membrane – Fits PW-RO4L, TGI-525, ROES-50
Sold out

CFS RO Filter Kit with 50 GPD Membrane – Fits PW-RO4L, TGI-525, ROES-50

Replaces PW-RO4L Sold out
$69.99
$64.99

Four piece RO kit from CFS with a 50 GPD membrane — the full annual service in one box: one sediment filter, one carbon block, one 50 GPD reverse o...

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$69.99
$64.99
Sold out
CFS RO Replacement Filter Set – Fits WP5-50, 560002, 560018
Sold out

CFS RO Replacement Filter Set – Fits WP5-50, 560002, 560018

Replaces WP5-50 Sold out
from $10.99

RO replacement filter set from CFS for the WP5-50 five stage system, covering the 560002 and 560018 positions. The full 7-piece annual kit includes...

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from $10.99
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CFS RO Filter Set with 50 GPD Membrane – Fits WP500024, WP-4V, WP5-50
Sale

CFS RO Filter Set with 50 GPD Membrane – Fits WP500024, WP-4V, WP5-50

Replaces WP500024 In stock
from $10.99

RO replacement filter set from CFS for WP-4V and WP5-50 five stage systems. The prefilters and the 50 GPD membrane in one box — on most systems, th...

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from $10.99
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CFS RO Prefilter Set – 10" x 2.5" – Fits FILTER-MAX-ES50, ROES-50, RO-90
Sold out

CFS RO Prefilter Set – 10" x 2.5" – Fits FILTER-MAX-ES50, ROES-50, RO-90

Replaces FILTER-MAX-ES50 Sold out
from $20.99

RO prefilter set from CFS covering the three prefilter positions of FILTER-MAX-ES50 and ROES-50 systems: one 5 micron sediment filter and two carbo...

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from $20.99
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CFS Universal Under Sink Reverse Osmosis Replacement Filter Kit – 50 GPD Membrane
Sale

CFS Universal Under Sink Reverse Osmosis Replacement Filter Kit – 50 GPD Membrane

In stock
from $27.99

This CFS universal replacement kit restores an under sink reverse osmosis system to day-one performance in one change: a 5 micron sediment pre-filt...

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from $27.99
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