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KDF / GAC Filters-NEW

GAC & KDF filter cartridges are designed to improve water quality by combining granular activated carbon with powerful KDF media. This filtration blend helps reduce chlorine, unpleasant taste, and common odors while targeting heavy metals such as iron and lead. Many homeowners rely on these cartridges for both city and well water systems. Replacement options are available in multiple sizes to fit standard whole-house and undersink housings. Consistent filter changes help maintain strong flow and reliable contaminant reduction.

About Our GAC & KDF Replacement Filter Products

Our selection includes a wide range of replacement GAC & KDF filter cartridges compatible with popular whole-house and drinking water systems. Sizes such as 2.5 x 10-inch and 4.5 x 20-inch cartridges make it easy to match existing housings. Options are available for sediment pre-filtration, carbon block stages, and KDF enhanced blends for scale control and heavy metal reduction. Several models are designed specifically for well water treatment, where iron and hydrogen sulfide are common concerns. Auto Ship choices simplify routine maintenance and help you stay on schedule without the hassle of reordering.

Why Choose iFilters for GAC & KDF Filter Products?

iFilters offers trusted replacement cartridges that meet the needs of residential and light commercial systems. Each product listing includes clear specifications so you can confirm size, micron rating, and compatibility before purchasing. Competitive pricing and strong customer ratings reflect dependable performance across many water conditions. Fast shipping and convenient Auto Ship programs make ongoing filter replacement simple. A broad inventory allows you to find the right cartridge without searching across multiple stores.

Shop GAC & KDF filter products online today!

Filters

SP30-KDF1-4510 Variations
iFilters

iFilters SP30-KDF1-4510 Sediment and GAC/KDF Replacement Filter - 4.5" x 10"

SP30-KDF1-4510
in stock

$80.00 - $80.00
$80.00
$80.00 - $80.00
$80.00

iFilters SP30-KDF1-4510 Whole House Sediment & GAC/KDF Replacement Filter – 4.5" x 10" Upgrade your home's water filtration with the iFilters S...

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$80.00 - $80.00
$80.00
$80.00 - $80.00
$80.00
iFilters SG-GAC-SET (LWH-D Version 2) OEM Replacement Filter Set Sediment, Rust & CTO Filters - IFilters
SG-GAC-SET Variations
iFilters

iFilters SG-GAC-SET (LWH-D Version 2) OEM Replacement Filter Set Sediment, Rust & CTO Filters

SG-GAC-SET
in stock

$24.99 - $24.99
$24.99
$24.99 - $24.99
$24.99

iFilters SG-GAC-SET (LWH-D Version 2) OEM Replacement Filter Set – Sediment & Carbon GAC Upgrade your iFilters LWH-D Whole House Filtration Sys...

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$24.99 - $24.99
$24.99
$24.99 - $24.99
$24.99
SP30-KDF1-4510 Variations
iFilters

iFilters SP30-KDF2-4520 Whole House Sediment & KDF Water Filter Set, 30 Micron 4.5"x20"

SP30-KDF2-4520
in stock

$119.00 - $119.00
$119.00
$119.00 - $119.00
$119.00

iFilters SP30-KDF2-4520 Whole House Sediment & KDF Water Filter Set – 30 Micron, 4.5" x 20" Upgrade your home's water filtration system with th...

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$119.00 - $119.00
$119.00
$119.00 - $119.00
$119.00
iFilters SG5-P1-SET (LWH-D) Replacement Filter Set - Whole House 2 Stage Sediment - Rust & CTO Filters - 2.5 x 10 - Interchangeable with AP117 & AP110 Filter Models - IFilters
SG-GAC-SET Variations
iFilters

iFilters SG5-P1-SET (LWH-D) Replacement Filter Set - Whole House 2 Stage Sediment - Rust & CTO Filters - 2.5 x 10 - Interchangeable with AP117 & AP110 Filter Models

SG5-P1-SET
in stock

$24.99 - $24.99
$24.99
$24.99 - $24.99
$24.99

iFilters SG5-P1-SET (LWH-D) Replacement Filter Set – Whole House 2-Stage Sediment & CTO Filtration Premium OEM Replacement Filters for Whole Ho...

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$24.99 - $24.99
$24.99
$24.99 - $24.99
$24.99
iFilters CBSM-2510 Coconut Shell CTO, Carbon Block Drinking Water Filter, 2.5 x 10, 0.5 Micron - IFilters
iFilters CBSM-2510 Coconut Shell CTO Carbon Block Drinking Water Filter – 2.5" x 10", 0.5 Micron
iFilters

iFilters CBSM-2510 Coconut Shell CTO, Carbon Block Drinking Water Filter, 2.5 x 10, 0.5 Micron

CBSM-2510
in stock

$19.99 - $19.99
$19.99
$19.99 - $19.99
$19.99

iFilters CBSM-2510 Coconut Shell CTO Carbon Block Drinking Water Filter – 2.5" x 10", 0.5 Micron High-Performance Filtration for Clean, Great-Tasti...

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$19.99 - $19.99
$19.99
$19.99 - $19.99
$19.99
PRO+AQUA

PRO+AQUA FC-PK-100E Whole House Heavy Metals Well Water Filter Replacement Set 3 Stage 20", 5 Micron

FC-PK-100E
in stock

$151.95 - $151.95
$151.95
$151.95 - $151.95
$151.95

PRO+AQUA FC-PK-100E Whole House Heavy Metals Well Water Filter Replacement Set – 3-Stage, 20", 5 Micron Upgrade your PRO+AQUA PRO-100-E Filtration ...

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$151.95 - $151.95
$151.95
$151.95 - $151.95
$151.95
PRO+AQUA

PRO+AQUA FC-PK19-100E Replacement Filter Set for PRO-100-E ELITE GEN2 System, Sediment, KDF/Blend, Carbon Infused

FC-PK19-100E
in stock

$0.00 - $0.00
$0.00
$151.95
$151.95 - $151.95
$151.95

PRO+AQUA ELITE GEN2 Three-Stage Replacement Filter Set for PRO-100-E GEN2 System Advanced Whole House Filtration for Superior Water Quality Designe...

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$0.00 - $0.00
$0.00
$151.95
$151.95 - $151.95
$151.95
iFilters Compatibles

iFilters Compatibles CB6 2-Pack 0.5-Micron Carbon Block Under-Sink Water Filter Replacement | Multipure Aquaversa Compatible – 2.5″ x 6.5″

IF-CB6-2PK
in stock

$57.00 - $57.00
$57.00
$57.00 - $57.00
$57.00

Deliver fresh, better-tasting water to your home with the iFilters Compatibles IF-CB6-2PK 2-Pack Carbon Block Replacement Filters, made for Multipu...

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$57.00 - $57.00
$57.00
$57.00 - $57.00
$57.00
Sale Sale
iFilters Compatibles

iFilters Compatibles CB6 Compatible Carbon Block Water Filter Replacement – 0.5 Micron Under-Sink Cartridge for Multipure Aquaversa Systems

IF-CB6
in stock

$37.99
$37.99 - $37.99
$37.99
$34.99
$34.99 - $34.99
$34.99

Keep your drinking water clean, clear, and tasty with the iFilters Compatibles QC-CB6 Carbon Block Water Filter Replacement, designed for Multipure...

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$37.99
$37.99 - $37.99
$37.99
$34.99
$34.99 - $34.99
$34.99
Sale Sale
iFilters GAC Carbon Water Filter Cartridge for LWHGAC V2, LWH-D V2 Systems - IFilters
iFilters

iFilters GAC Carbon Water Filter Cartridge for LWHGAC V2, LWH-D V2 Systems

GAC-2509
in stock
$15.99 - $15.99
$15.99
$15.99 - $15.99
$15.99

The GAC-2509 Premium Carbon GAC Water Filter is a Granular Activated Coconut Shell Carbon filter that Removes Chlorine, taste and Odor and has a Hi...

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$15.99 - $15.99
$15.99
$15.99 - $15.99
$15.99
PRO+AQUA

PRO+AQUA RV Replacement Filter for WS-P-REG-KITV2, Taste, Odor, Sediment, Chlorine

FC-9-PF
Out of stock

$15.99 - $15.99
$15.99
$15.99 - $15.99
$15.99

The PRO+AQUA FC-9-PF is a dual two-stage filter in one. The first stage filters sediment, dirt, sand, and other particles down to the 5 micron leve...

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$15.99 - $15.99
$15.99
$15.99 - $15.99
$15.99
iFilters KDF and GAC Well or City Water Whole House Filtration 4.5" x 10" - IFilters
iFilters KDF and GAC Well or City Water Whole House Filtration 4.5" x 10" - IFilters
iFilters

iFilters KDF and GAC Well or City Water Whole House Filtration 4.5" x 10"

KDF1-4510
in stock

$54.99 - $54.99
$54.99
$54.99 - $54.99
$54.99

KDF1-4510 4.5" x 10" Coconut GAC + 1 LB KDF cartridge. For City or Well Water Whole House or Commercial use. This filter is made from coconut shell...

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$54.99 - $54.99
$54.99
$54.99 - $54.99
$54.99
RO Replacement Kit Variations
Smart Pack

Reverse Osmosis Replacement Filter Set RO Cartridges 5 pcs w/ 75 GPD Membrane

RO-75KIT
in stock
$41.15 - $41.15
$41.15
$41.15 - $41.15
$41.15

5 Stage NSF Reverse Osmosis RO Replacement Water Filter Set with 75 GPD Membrane. For any standard RO system. Sediment, UDF, CTO, Membrane and GAC ...

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$41.15 - $41.15
$41.15
$41.15 - $41.15
$41.15
iFilters Compatibles

iFilters Compatibles Royal Prestige Replacement Filter – 0.5 Micron Coconut Shell Carbon Block Under-Sink Water Filter 2-Pack

RP-CB456505-2PK
in stock

$99.99 - $99.99
$99.99
$99.99 - $99.99
$99.99

Enjoy cleaner, better-tasting water with the iFilters Compatibles Royal Prestige Carbon Block Replacement Filter 2-Pack. Designed for FrescaPure 40...

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$99.99 - $99.99
$99.99
$99.99 - $99.99
$99.99
Drinking Water Replacement Filter Set for 3 stage Filtration Systems - IFilters
iFilters

Drinking Water Replacement Filter Set for 3 stage Filtration Systems

IFD-U3PK
in stock

$38.99 - $38.99
$38.99
$38.99 - $38.99
$38.99

The IFD-U3PK combines Sediment filtration with GAC and KDF to filter and reduce heavy metals as well as chlorine, taste, and odor found in city and...

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$38.99 - $38.99
$38.99
$38.99 - $38.99
$38.99
(6 Pack) Hydro Guard HDG-P117/6 Premium GAC Water Filter Cartridge - Interchangeable with AP117
(6 Pack) Hydro Guard HDG-P117/6 Premium GAC Water Filter Cartridge - Interchangeable with AP117
Hydro Guard

(6 Pack) Hydro Guard HDG-P117/6 Premium GAC Water Filter Cartridge - Interchangeable with AP117

HDG-P117/6
in stock

$41.60 - $41.60
$41.60
$41.60 - $41.60
$41.60

(6 Pack) Hydro Guard HDG-P117/6 Premium GAC Water Filter Cartridge – AP117 Compatible Replacement The (6 Pack) Hydro Guard HDG-P117/6 Granular Acti...

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$41.60 - $41.60
$41.60
$41.60 - $41.60
$41.60
ICF/ISF Variations
Hydronix

RO Post Polishing Fridge Ice Inline Coconut GAC Water Filter, 2000 Gal, 1/4" NPT

ICF-10
in stock
$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00

Hydronix ICF-10 inline coconut shell carbon filters have 1/4" npt connections and are suitable for drinking water filtration applications. The coco...

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$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00
Smart Pack

Hydronix Compatible Culligan AC-30 AC-15 RO 3 Filter Replacement Set for Reverse Osmosis Drinking Water System, 12.5x5x1.9, White

RO-CUL-3
in stock
$23.75 - $23.75
$23.75
$23.75 - $23.75
$23.75

Reverse Osmosis (RO) Replacement water filters for AC-30 (AC30) and AC-15 (AC15) Reverse Osmosis (RO) Systems. Includes Sediment, Carbon Block and ...

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$23.75 - $23.75
$23.75
$23.75 - $23.75
$23.75
Whole House Coconut Shell Carbon GAC Water Filter 4.5 x 20 - IFilters
Hydronix

Whole House Coconut Shell Carbon GAC Water Filter 4.5 x 20

UDF-20BP
in stock

$30.95 - $30.95
$30.95
$30.95 - $30.95
$30.95

The Hydronix UDF-20BP granular activated carbon (GAC) cartridges are the best choice for your higher flow, taste, odder and chlorine reduction need...

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$30.95 - $30.95
$30.95
$30.95 - $30.95
$30.95
IF-P117 AP117 Compatible GAC Water Filter 4 Pack - IFilters
iFilters

IF-P117 AP117 Compatible GAC Water Filter 4 Pack

IF-P117/4
in stock

$35.00 - $35.00
$35.00
$35.00 - $35.00
$35.00

4 Pack of the Aqua-Pure AP117 Compatible Premium Carbon IF-P117 GAC Water Filter. Premium GAC Granular Activated Coconut Shell Carbon Removes Chlor...

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$35.00 - $35.00
$35.00
$35.00 - $35.00
$35.00
iFilters Compatibles

iFilters Compatibles CB8 Replacement Filter – 0.5 Micron Carbon Block Under‑Sink Water Filter

IF-CB8
in stock

$43.07 - $43.07
$43.07
$43.07 - $43.07
$43.07

Enjoy fresher, cleaner water every day with the iFilters Compatibles CB8 Carbon Block Water Filter, a reliable replacement for Amway E‑84, E‑85, A1...

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$43.07 - $43.07
$43.07
$43.07 - $43.07
$43.07
Hydrogen Sulfide, Iron, Heavy Metals, Scale Control Water Filter, .5 lb KDF85 2.5x10 - IFilters
Hydrogen Sulfide, Iron, Heavy Metals, Scale Control Water Filter, .5 lb KDF85 2.5x10 - IFilters
iFilters

Hydrogen Sulfide, Iron, Heavy Metals, Scale Control Water Filter, .5 lb KDF85 2.5x10

KDF85-10-0.5
in stock
$28.99 - $28.99
$28.99
$28.99 - $28.99
$28.99

KDF85-10 2.5" x 10" Coconut GAC + KDF85 standard size filter cartridge. For Well Water or City Whole House filtration as well as Commercial use. T...

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$28.99 - $28.99
$28.99
$28.99 - $28.99
$28.99
2 Pack - Hydronix SDP-4510 Dual Purpose Radial Flow Cartridge 4.5" x 10" - IFilters
2 Pack - Hydronix SDP-4510 Dual Purpose Radial Flow Cartridge 4.5" x 10"
Hydronix

2 Pack - Hydronix SDP-4510 Dual Purpose Radial Flow Cartridge 4.5" x 10"

SDP-4510/2
in stock
$45.40 - $45.40
$45.40
$45.40 - $45.40
$45.40

This Hydronix SDP-4510 Sediment Dual Purpose Radial Flow GAC Carbon Filter is best filter in the market for Dual Purpose Filtration and is comparab...

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$45.40 - $45.40
$45.40
$45.40 - $45.40
$45.40
iFilters KDF and GAC City or Well Water Whole House Filtration 4.5" x 20" - IFilters
iFilters KDF and GAC City or Well Water Whole House Filtration 4.5" x 20" - IFilters
iFilters

iFilters KDF and GAC City or Well Water Whole House Filtration 4.5" x 20"

KDF2-4520
in stock

$109.99 - $109.99
$109.99
$109.99 - $109.99
$109.99

KDF2-4520 4.5" x 20" Coconut GAC + 2LBS KDF size cartridge. For City or Well Water Whole House or Commercial use. This filter is made from coconut ...

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$109.99 - $109.99
$109.99
$109.99 - $109.99
$109.99
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