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GAC & KDF
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!
Sale
$80.00
$72.00
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
$72.00
Auto
Ship
iFilters SG-GAC-SET (LWH-D Version 2) OEM Replacement Filter Set Sediment, Rust & CTO Filters
iFilters SG-GAC-SET (LWH-D Version 2) OEM Replacement Filter Set Sediment, Rust & CTO Filters
in stock
Sale
$24.99
$22.50
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
$22.50
Sale
$119.00
$107.10
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
$107.10
Sale
$24.99
$22.50
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
$22.50
PRO+AQUA FC-PK-100E Whole House Heavy Metals Well Water Filter Replacement Set 3 Stage 20", 5 Micron
PRO+AQUA FC-PK-100E Whole House Heavy Metals Well Water Filter Replacement Set 3 Stage 20", 5 Micron
Out of stock
Sale
$151.95
$136.76
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
$136.76
PRO+AQUA FC-PK19-100E Replacement Filter Set for PRO-100-E ELITE GEN2 System, Sediment, KDF/Blend, Carbon Infused
Out of stock
Sale
$151.95
$136.76
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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$151.95
$136.76
Sale
$15.99
$14.40
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
$14.40
Sale
$54.99
$49.50
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
$49.50
Auto
Ship
(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
in stock
Sale
$41.60
$37.44
(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
$37.44
Sale
$35.00
$31.50
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
$31.50
Sale
$28.99
$26.10
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
$26.10
Sale
$8.12
$7.31
The Hydronix UDF-10 granular activated carbon (GAC) cartridges are the best choice for your higher flow, taste, odder and chlorine reduction needs....
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$8.12
$7.31
Sale
$109.99
$99.00
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
$99.00
Sale
$89.99
$81.00
KDF85-20B 4.5" x 20" Coconut GAC + KDF85 Big Blue size cartridge. For Well Water or City Whole House filtration as well as Commercial use. This fil...
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$89.99
$81.00
Sale
$129.99
$117.00
KDF85-10B 4.5" x 10" Coconut GAC + KDF85 Big Blue size cartridge. For Well Water or City Whole House filtration as well as Commercial use. This fil...
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$129.99
$117.00
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(4 Pack) Hydro Guard HDG-P117 Aqua-Pure AP117 Cuno Compatible GAC Water Filters Premium Carbon
(4 Pack) Hydro Guard HDG-P117 Aqua-Pure AP117 Cuno Compatible GAC Water Filters Premium Carbon
in stock
Sale
$32.00
$28.80
Hydro Guard HDG-P117 Aqua-Pure AP117 Compatible GAC Water Filters – 4-Pack Upgrade your water filtration system with the Hydro Guard HDG-P117 Carbo...
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$32.00
$28.80
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Ship
iFilters IF-P117 GAC Water Filter Whole House - 2.5" x 10" - Interchangeable with AP117 Model
iFilters IF-P117 GAC Water Filter Whole House - 2.5" x 10" - Interchangeable with AP117 Model
in stock
Sale
$15.99
$14.40
The IF-P117 (AP117 Interchangeable) Premium Carbon GAC Water Filter is a Granular Activated Coconut Shell Carbon filter that Removes Chlorine, tast...
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$15.99
$14.40
Sale
$99.99
$90.00
Hydronix Whole House UDF-4520GACKDF2 4.5" x 20" Coconut GAC + 2LBS KDF, Big Blue size cartridge. This filter is made from coconut shell GAC in comb...
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$99.99
$90.00
Sale
$15.35
$13.82
The Hydronix UDF-10KDF.5 is a 2.5" x 10" KDF replacement with 0.5 lbs of KDF media. For use in many water filter systems, especially whole-house fi...
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$15.35
$13.82
iFilters SG-GAC-SET (LWH-D Version 2) OEM Replacement Filter Set Sediment, Rust & CTO Filters (2 Pack)
Out of stock
Sale
$45.00
$40.50
iFilters SG-GAC-SET (LWH-D Version 2) OEM Replacement Filter Set – Sediment & Carbon GAC (2 Pack) Upgrade your iFilters LWH-D Whole House Filt...
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$45.00
$40.50
Sale
$27.99
$25.20
The iFilters KDF05-10 is a 2.5" x 10" KDF replacement filter with 0.5 lbs of KDF media. For use in many water filter systems, especially point of u...
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$27.99
$25.20
Sale
$6.40
$5.76
The Hydronix UDF-10PF is a dual two stage filter in one. The first stage filters sediment, dirst, sand and other particles down to the 5 micron lev...
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$6.40
$5.76
Sale
$43.66
$39.30
The Hydronix UDF-10KDF2 is a 2.5" x 10" KDF replacement with 2 lbs of KDF media. For use in many water filter systems, especially whole house filte...
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$43.66
$39.30
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Ship
(2 Pack) Hydro Guard HDG-P117/2 Universal GAC Water Filter Cartridge Compatible with AP117
Sale
$20.83
$18.75
Hydro Guard HDG-P117/2 Universal GAC Water Filter Cartridge – AP117 Compatible (2-Pack) Upgrade your water filtration system with the Hydro Guard H...
View full detailsSale
$20.83
$18.75
