Replacement Filter Sets & Kits

Complete multi-stage replacement sets — everything your system needs for a full service in one order.

RO filter replacement kit compatible with Hydrotech 4VTFC50G and 4VTFC50G-PB models

Compatible with Hydrotech 4VTFC50G or 4VTFC50G-PB RO Filter Replacement Kit

Replaces 4VTFC50G In stock
from $29.99

Hydrotech 4VTFC50G or 4VTFC50G-PB RO Filter Replacement KitHydrotech 4VTFC50G or 4VTFC50G-PB RO Filter Replacement Kit1-Year Filter Replacement Bun...

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from $29.99
CFS RO Filter Kit with 50 GPD Membrane – Fits PW-RO4L, TGI-525, ROES-50

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

Replaces PW-RO4L In stock
$69.99

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
CFS RO Filter Kit – 50 GPD Membrane – Fits Proline Plus, PuroMax PC4

CFS RO Filter Kit – 50 GPD Membrane – Fits Proline Plus, PuroMax PC4

Replaces Proline Plus In stock
from $24.99

CFS reverse osmosis service parts for standard under-sink systems, including Proline Plus and PuroMax PC4 class four and five stage units. The 50 G...

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from $24.99
CFS Universal 4-Stage Under Sink RO Replacement Filter Kit

CFS Universal 4-Stage Under Sink RO Replacement Filter Kit

In stock
$37.92

Restore your under sink reverse osmosis system to day-one performance in one simple change. After 6–12 months sediment loads up and carbon exhausts...

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$37.92
CFS Sediment and Carbon Filter Kit – 2 Pack – 1 Micron – Fits 10" RO and Under Sink

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

In stock
$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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$22.99
CFS 3 Stage RO Filter Set – Sediment, Carbon Block and Membrane – 50 to 150 GPD

CFS 3 Stage RO Filter Set – Sediment, Carbon Block and Membrane – 50 to 150 GPD

In stock
from $45.99

A complete CFS three-piece service set for standard three stage under-sink reverse osmosis systems: one sediment prefilter, one carbon block cartri...

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from $45.99
CFS Replacement RO Filter Set – 4 Pieces – Carbon, Sediment and Inline – Fits AC-30

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

Replaces AC-30 In stock
$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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$38.99
CFS RO Prefilter Set – 5 Micron – 10 x 2.5 – Fits FILTER-SET-ES, ROES-50, ROES-75

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

Replaces FILTER-SET-ES In stock
from $20.99

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 $20.99
CFS Sediment and Carbon Block Filter Set – 5 Micron – 9.75 x 2.5 – Fits WHKF-GD05, WHKF-WHWC

CFS Sediment and Carbon Block Filter Set – 5 Micron – 9.75 x 2.5 – Fits WHKF-GD05, WHKF-WHWC

Replaces P5 In stock
from $16.99

CFS two-stage filter set pairing 5 micron sediment cartridges with coconut shell carbon blocks, each a standard 9.75 x 2.5 inches. The sediment sta...

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from $16.99
CFS RO Filter Kit with 75 GPD Membrane – Fits TGI-525 Five Stage Systems

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

Replaces TGI-525 In stock
$59.99

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

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

Replaces WP5-50 In stock
from $12.99

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 $12.99
CFS RO Filter Set with 50 GPD Membrane – Fits WP500024, WP-4V, WP5-50

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

Replaces WP500024 In stock
from $12.99

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 $12.99
CFS RO Prefilter Set – 10" x 2.5" – Fits FILTER-MAX-ES50, ROES-50, RO-90

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

Replaces FILTER-MAX-ES50 In stock
from $22.99

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 $22.99