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Carbon Block Filters

Clean-tasting water starts with the right cartridge, and Carbon Block Filters are a go-to choice for homes and facilities that want reliable adsorption. Designed to reduce chlorine taste and odor while trapping fine particulates, these filters support better water at the tap, shower, and point of use. Options on this page cover common housings and system types, so matching a replacement is straightforward. Micron ratings range from sub-micron polishing levels up to higher-flow choices for heavier demand. Choose based on flow goals, housing size, and contaminants.

About Carbon Block Filters

Carbon block cartridges are formed from compressed activated carbon, which creates a dense media bed with consistent flow paths. Many selections use NSF-certified materials, which helps buyers choose with more confidence for everyday use. Sizing varies from slim 2.5-inch cartridges to big blue 4.5-inch formats, including popular 10-inch and 20-inch lengths. Micron choices can span about 0.5 to 100, supporting everything from taste improvement to sediment support in multi-stage setups. Whole house, commercial, and industrial applications can be covered by choosing the right diameter, length, and rating for your system and water conditions.

Why Choose iFilters for Carbon Block Filters?

iFilters makes shopping simple with clear product names, compatible sizes, and in-stock visibility, so you spend less time guessing and more time maintaining water quality. Auto Ship helps keep replacements on schedule, which can protect flow rate and filtration performance over time. Range matters too, since the catalog includes carbon block sets, single cartridges, and multi-pack options for higher-usage locations. Customer reviews on many listings add real-world context about fit, performance, and value. Fast shipping and helpful support round out a purchase experience built for both first-time buyers and pros.

Shop carbon block filters online today!

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iFilters SW-CB5-4520 Whole House Sediment & Carbon Block Water Filter Set – 5 Micron, 4.5" x 20"
iFilters

iFilters SW-CB5-4520 Whole House Sediment & Carbon Block Water Filter, 5 Micron 4.5"x20"

SW-CB5-4520
in stock

$59.99 - $59.99
$59.99
$59.99 - $59.99
$59.99

iFilters SW-CB5-4520 Whole House Sediment & Carbon Block Water Filter Set – 5 Micron, 4.5" x 20" Premium Dual-Stage Whole House Filtration for ...

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$59.99 - $59.99
$59.99
$59.99 - $59.99
$59.99
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SW-CB5-4510 Whole House Sediment & Carbon Block Water Filter, 5 Micron 4.5"x10" - IFilters
iFilters

SW-CB5-4510 Whole House Sediment & Carbon Block Water Filter, 5 Micron 4.5"x10"

SW-CB5-4510
in stock

$41.00 - $41.00
$41.00
$41.00 - $41.00
$41.00

This dual filter set includes the SW5-4510 Sediment String-wound filter and CB5-4510 CTO carbon block whole house filters. Suitable for whole hou...

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$41.00 - $41.00
$41.00
$41.00 - $41.00
$41.00
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(4 Pack) Hydronix CB-45-2005/4 CTO Whole House Coconut Shell Carbon Block Water Filters 20" x 4.5", 5 micron - IFilters
CB-45-2005 Variations
Hydronix

(4 Pack) Hydronix CB-45-2005/4 CTO Whole House Coconut Shell Carbon Block Water Filters 20" x 4.5", 5 micron

CB-45-2005/4
in stock

$135.95 - $135.95
$135.95
$135.95 - $135.95
$135.95

(4 Pack) Hydronix CB-45-2005/4 Whole House Carbon Block Water Filters – 20" x 4.5", 5 Micron High-Performance Filtration for Residential & Comm...

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$135.95 - $135.95
$135.95
$135.95 - $135.95
$135.95
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Hydronix 4 Pack CB-45-1005 Whole House, Hydroponics Carbon Block Water Filters CTO 4.5" x 10" - 5 micron - IFilters
Hydronix 4 Pack CB-45-1005 Whole House, Hydroponics Carbon Block Water Filters CTO 4.5" x 10" - 5 micron - IFilters
Hydronix

Hydronix 4 Pack CB-45-1005 Whole House, Hydroponics Carbon Block Water Filters CTO 4.5" x 10" - 5 micron

CB-45-1005/4
in stock
$67.95 - $67.95
$67.95
$67.95 - $67.95
$67.95

4 Pack Hydronix CB-45-1005 Coconut Shell Carbon Block water filter cartridge measures 4.5" x 10" standard. This filters offers a 5 micron nominal f...

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$67.95 - $67.95
$67.95
$67.95 - $67.95
$67.95
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Hydronix CB-45-1005 Whole House Carbon Block Water Filter CTO 4.5" x 10" - 5 Micron - IFilters
CB-45-1005 Variations
Hydronix

Hydronix CB-45-1005 Whole House Carbon Block Water Filter CTO 4.5" x 10" - 5 Micron

CB-45-1005/8
in stock
$139.00 - $139.00
$139.00
$139.00 - $139.00
$139.00

8 Pack Hydronix CB-45-1005 Coconut Shell Carbon Block water filter cartridge measures 4.5" x 10" standard. This filters offers a 5 micron nominal f...

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$139.00 - $139.00
$139.00
$139.00 - $139.00
$139.00
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2 Pack - Hydronix CB-45-2005 CTO Whole House Coconut Shell Carbon Block Water Filters 20" x 4.5", 5 micron - IFilters
2 Pack - Hydronix CB-45-2005 CTO Whole House Coconut Shell Carbon Block Water Filters 20" x 4.5", 5 micron - IFilters
Hydronix

2 Pack - Hydronix CB-45-2005 CTO Whole House Coconut Shell Carbon Block Water Filters 20" x 4.5", 5 micron

CB-45-2005/2
in stock
$75.00 - $75.00
$75.00
$75.00 - $75.00
$75.00

2 Pack Hydronix CB-45-2005 (Pentek EP-20BB, Watts WCBCFF20 Comparable) Coconut Shell Carbon Block water filter cartridge measures 4.5" x 20" standa...

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$75.00 - $75.00
$75.00
$75.00 - $75.00
$75.00
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Hydronix Coconut Carbon Block Water Filter 4.5" x 20" - 0.5 Micron - SMCB-4520
Hydronix

Hydronix Coconut Carbon Block Water Filter 4.5" x 20" - 0.5 Micron - SMCB-4520

SMCB-4520
in stock

$59.95 - $59.95
$59.95
$59.95 - $59.95
$59.95

Hydronix SMCB-4520 carbon block filters are NSF/ANSI standard 42 certified for Material and structural Safety. SMCB-4520 filters have a particle re...

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$59.95 - $59.95
$59.95
$59.95 - $59.95
$59.95
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Whole House & RO Coconut Activated Carbon Block Water Filter 5 μm 2.5" x 20"
Hydronix

Whole House & RO Coconut Activated Carbon Block Water Filter 5 μm 2.5" x 20"

CB-25-2005
in stock
$18.51 - $18.51
$18.51
$18.51 - $18.51
$18.51

Hydronix CB-25-2005 carbon block filters are NSF/ANSI standard 42 certified for Material and structural Safety. CB-25-2005 filters have a particle ...

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$18.51 - $18.51
$18.51
$18.51 - $18.51
$18.51
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Hydronix CB-45-2005 Whole House, Hydroponics, Commercial Carbon Block Water Filter 4.5" x 20" - 5 μm
Hydronix CB-45-2005 Whole House, Hydroponics, Commercial Carbon Block Water Filter 4.5" x 20" - 5 μm
Hydronix

Hydronix CB-45-2005 Whole House, Hydroponics, Commercial Carbon Block Water Filter 4.5" x 20" - 5 μm

CB-45-2005
in stock
$39.50 - $39.50
$39.50
$39.50 - $39.50
$39.50

Hydronix CB-45-2005 Whole House, Hydroponics, Commercial Carbon Block Water Filter – 4.5" x 20", 5 Micron Superior Water Filtration for Residential...

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$39.50 - $39.50
$39.50
$39.50 - $39.50
$39.50
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Whole House, Hydroponics, Commercial Carbon Block Water Filter 10 μm 4.5" x 20"
Hydronix

Whole House, Hydroponics, Commercial Carbon Block Water Filter 10 μm 4.5" x 20"

CB-45-2010
in stock
$66.99 - $66.99
$66.99
$66.99 - $66.99
$66.99

Hydronix CB-45-2010 carbon block filters are NSF/ANSI standard 42 certified for Material and structural Safety. CB-45-2010 filters have a particle ...

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$66.99 - $66.99
$66.99
$66.99 - $66.99
$66.99
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CB5-4520 Whole House Carbon Block Water Filter, 5 Micron 4.5"x20" - IFilters
iFilters

CB5-4520 Whole House Carbon Block Water Filter, 5 Micron 4.5"x20"

CB5-4520
in stock

$39.99 - $39.99
$39.99
$39.99 - $39.99
$39.99

The CB5-4520 carbon block whole house filters have a particle retention Size of 5 microns. Perfect for Drinking water filtration as well as Whole H...

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$39.99 - $39.99
$39.99
$39.99 - $39.99
$39.99
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CB5-4510 Whole House Carbon Block Water Filter, 5 Micron 4.5"x10" - IFilters
iFilters

CB5-4510 Whole House Carbon Block Water Filter, 5 Micron 4.5"x10"

CB5-4510
in stock

$29.49 - $29.49
$29.49
$29.49 - $29.49
$29.49

The CB5-4510 carbon block whole house filters is have a particle retention Size of 5 microns. Suitable for Drinking water filtration applications a...

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$29.49 - $29.49
$29.49
$29.49 - $29.49
$29.49
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(3 Pack) Hydronix CB-25-2010/3 RO Coconut Activated Carbon Block Water Filter 10 micron 2.5" x 20" - IFilters
(3 Pack) Hydronix CB-25-2010 Carbon Block Water Filters – 10 Micron, 2.5” x 20”
Hydronix

(3 Pack) Hydronix CB-25-2010/3 RO Coconut Activated Carbon Block Water Filter 10 micron 2.5" x 20"

CB-25-2010/3
in stock
$39.69 - $39.69
$39.69
$39.69 - $39.69
$39.69

(3 Pack) Hydronix CB-25-2010 Carbon Block Water Filters – 10 Micron, 2.5” x 20” Upgrade your water filtration system with the Hydronix CB-25-2010 C...

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$39.69 - $39.69
$39.69
$39.69 - $39.69
$39.69
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Reverse Osmosis Drinking Filter Systems Coconut Shell Carbon Water Filter 10 μm
Hydronix

Reverse Osmosis Drinking Filter Systems Coconut Shell Carbon Water Filter 10 μm

CB-25-1010
in stock
$10.99 - $10.99
$10.99
$10.99 - $10.99
$10.99

The Hydronix CB-25-1010 NSF Certified Carbon Block water filter is manufactured with high purity coconut shell carbon and is available in a wide ra...

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$10.99 - $10.99
$10.99
$10.99 - $10.99
$10.99
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Coconut Shell CTO, Carbon Block Water Filter Cartridge, 0.5 Micron 2.5 x 20 - IFilters
Coconut Shell CTO, Carbon Block Water Filter Cartridge, 0.5 Micron 2.5 x 20 - IFilters
Hydronix

Coconut Shell CTO, Carbon Block Water Filter Cartridge, 0.5 Micron 2.5 x 20

SMCB-2520
in stock

$23.74 - $23.74
$23.74
$23.74 - $23.74
$23.74

Hydronix SMCB-2520 carbon block filters are NSF/ANSI standard 42 certified for Material and structural Safety. SMCB-2520 filters have a particle re...

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$23.74 - $23.74
$23.74
$23.74 - $23.74
$23.74
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Hydronix 2 Pack CB-45-1005 Whole House, Hydroponics Carbon Block Water Filters CTO 4.5" x 10" - 5 micron - IFilters
Hydronix

Hydronix 2 Pack CB-45-1005 Whole House, Hydroponics Carbon Block Water Filters CTO 4.5" x 10" - 5 micron

CB-45-1005/2
in stock
$40.24 - $40.24
$40.24
$40.24 - $40.24
$40.24

2 Pack Hydronix CB-45-1005 Coconut Shell Carbon Block water filter cartridge measures 4.5" x 10" standard. This filters offers a 5 micron nominal f...

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$40.24 - $40.24
$40.24
$40.24 - $40.24
$40.24
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(3 Pack) Hydronix CB-45-1001/3 Wholehouse Hydroponics Carbon Block Water Filter 1 Micron 4.5" x 10", 3 Pack - IFilters
(3 Pack) Hydronix CB-45-1001/3 – 1 Micron Whole House & Hydroponics Carbon Block Water Filters (4.5" x 10")
Hydronix

(3 Pack) Hydronix CB-45-1001/3 Wholehouse Hydroponics Carbon Block Water Filter 1 Micron 4.5" x 10", 3 Pack

CB-45-1001/3
in stock

$69.00 - $69.00
$69.00
$69.00 - $69.00
$69.00

(3 Pack) Hydronix CB-45-1001/3 – 1 Micron Whole House & Hydroponics Carbon Block Water Filters (4.5" x 10") The Hydronix CB-45-1001/3 is a 3-pa...

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$69.00 - $69.00
$69.00
$69.00 - $69.00
$69.00
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Whole House, Hydroponics, Commercial Coconut Carbon Block Water Filter 10 μm 10"
Hydronix

Whole House, Hydroponics, Commercial Coconut Carbon Block Water Filter 10 μm 10"

CB-45-1010
in stock
$25.86 - $25.86
$25.86
$25.86 - $25.86
$25.86

Hydronix CB-45-1010 carbon block filters are NSF/ANSI standard 42 certified for Material and structural Safety. CB-45-1010 filters have a particle ...

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$25.86 - $25.86
$25.86
$25.86 - $25.86
$25.86
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Whole House, Commercial, Industrial Carbon Block Water Filter 1 μm 4.5" x 20"
Hydronix

Whole House, Commercial, Industrial Carbon Block Water Filter 1 μm 4.5" x 20"

CB-45-2001
in stock
$55.00 - $55.00
$55.00
$55.00 - $55.00
$55.00

Hydronix CB-45-2001 Carbon Block filters are NSF/ANSI Standard 42 certified for material and structural safety. CB-45-2001 filters have a particle ...

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$55.00 - $55.00
$55.00
$55.00 - $55.00
$55.00
Auto Ship
Whole House, Hydroponics, Commercial Coconut Carbon Block Water Filter 5 μm 10"
Hydronix

Whole House, Hydroponics, Commercial Coconut Carbon Block Water Filter 5 μm 10"

CB-45-1005
in stock
$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00

Hydronix CB-45-1005 carbon block filters are NSF/ANSI standard 42 certified. CB-45-1005 filters have a particle retention Size of 5 microns, and ar...

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$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00
Auto Ship
Wholehouse Hydroponics RO Carbon Block Water Filter 1 Micron 4.5" x 10"
Hydronix

Wholehouse Hydroponics RO Carbon Block Water Filter 1 Micron 4.5" x 10"

CB-45-1001
in stock

$32.08 - $32.08
$32.08
$32.08 - $32.08
$32.08

Hydronix CB-25-2010 carbon block filters are NSF/ANSI standard 42 certified for Material and structural Safety. CB-25-2010 filters have a particle ...

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$32.08 - $32.08
$32.08
$32.08 - $32.08
$32.08
Auto Ship
Universal Fit Coconut Shell Activated Carbon Block Water Filter 1 μm 2.5" x 20"
Hydronix

Universal Fit Coconut Shell Activated Carbon Block Water Filter 1 μm 2.5" x 20"

CB-25-2001
in stock
$23.00 - $23.00
$23.00
$23.00 - $23.00
$23.00

Hydronix CB-25-2001 carbon block filters are NSF/ANSI standard 42 certified for Material and structural Safety. CB-25-2001 filters have a particle ...

View full details
$23.00 - $23.00
$23.00
$23.00 - $23.00
$23.00
Auto Ship
Whole House, RO Coconut Activated Carbon Block Water Filter 10 micron 2.5" x 20"
Hydronix

Whole House, RO Coconut Activated Carbon Block Water Filter 10 micron 2.5" x 20"

CB-25-2010
in stock
$19.50 - $19.50
$19.50
$19.50 - $19.50
$19.50

Hydronix CB-25-2010 carbon block filters are NSF/ANSI standard 42 certified for Material and structural Safety. CB-25-2010 filters have a particle ...

View full details
$19.50 - $19.50
$19.50
$19.50 - $19.50
$19.50
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