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The only way to ensure that all of the water in your home, including the water you use to drink, bathe in, wash dishes and clothing in and cook with, is purified and free of harmful contaminates, is to invest in a whole house water filtration system.

There are many benefits of using a whole house water filtration system. At the top of the list, is ensuring pure, healthy, better tasting drinking water for the whole family by filtering out chlorine and other harmful chemicals. This also leads to better overall household cleaning since removing the chemicals reduces soap scum buildup and allows more thorough rinsing of soaps, laundry detergents, cleansers and shampoo.

In order to maintain an efficient and effective system, is very important that you replace the filters in your whole house water filtration system regularly, based on the manufacturers specifications, water quality and usage.


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20 Inch Big Blue Carbon Filters product list


Pentek RFC20BB Radial Flow Carbon Filter WRC25HD20
(RFC20-BB)

The Pentek, Ametek, US Filter RFC20-BB Heavy Duty Radial Flow Carbon Filter reduces chlorine taste & odor and other bad tastes & odor, coarse sand, rust, and scale particles. Also known as American Plumber WRC25HD20.


In Stock! Ships in 15 to 16 business days.
Pentek RFC20BB Radial Flow Carbon Filter WRC25HD20
As Low As: $51.90
Retail: $79.07
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Hydronix 20 x 4.5" Carbon Filter - 5 Micron
(CB-45-2005)

The Hydronix 20" Carbon Filter (Hydronix CB-45-2005) is a carbon block cartridge replacement built with a 5 micron rating that will help reduce contaminants sometimes found in water. This 20" carbon block filter can be used in several diffe


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Hydronix 20 x 4.5" Carbon Filter - 5 Micron
Our Price: $27.25
Retail: $59.47
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Pentek NCP-20BB 20" Big Blue Water Filter
(NCP-20BB)

The Pentek NCP-20BB 20" Big Blue filter filters sediment as well as chlorine taste & odor. The NCP-20BB is constructed with carbon impregnated media, not cellulose, therefore providing resistance to bacterial attack.


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Pentek NCP-20BB 20" Big Blue Water Filter
As Low As: $33.25
Retail: $46.55
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Pentek EPM-20BB Carbon Briquette Filter, 155783
(EPM-20BB)

The Pentek, Ametek, US Filter EPM-20BB 20" Carbon Briquette Filter Cartridge is designed to reduce and remove Chlorine taste & Odor as well as dirt, sand, and sediment from your household water.


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Pentek EPM-20BB Carbon Briquette Filter, 155783
As Low As: $38.70
Retail: $53.07
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Pentek GAC20-BB 20" Big Blue GAC Filter, 155249
(GAC20-BB)

The Pentek GAC20-BB 20" Big Blue Granular Activated Carbon Filter Cartridge effectively reduces chlorine taste and odor and bad taste and odor from your drinking water.


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Pentek GAC20-BB 20" Big Blue GAC Filter, 155249
As Low As: $44.75
Retail: $63.24
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Pentek CBC-20BB Carbon Block Filter, 155312
(CBC20-BB)

The Pentek CBC-20BB .5 Micron 20" Big Blue Carbon Block Water Filter not only reduces chlorine taste & odor and sediment, but also reduces Giardia cysts and Cryptosporidium up to 99.95%.


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Pentek CBC-20BB Carbon Block Filter, 155312
As Low As: $69.99
Retail: $105.13
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KX Matrikx +CTO/2 Carbon Filter 32-425-125-20
(32-425-125-20)

The KX Matrikx +CTO/2 Carbon Block Filter 32-425-125-20 is NSF tested and Certified to reduce Chlorine Taste & Odor from your drinking water. Also known as The Workhorse. 20" BB Filter.


Out of stock
KX Matrikx +CTO/2 Carbon Filter 32-425-125-20
Our Price: $45.00
Retail: $50.00
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Pentek EP-20BB Carbon Briquette Filter 155583
(EP-20BB)

The Pentek, Ametek, US Filter EP-20BB 20" Carbon Briquette Filter Cartridge is designed to reduce and remove Chlorine taste & Odor as well as dirt, sand, and sediment from your household water.


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Pentek EP-20BB Carbon Briquette Filter 155583
As Low As: $44.99
Retail: $59.92
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Pentek CFB-Plus20BB Filter - 20" Big Blue Carbon
(CFB-Plus20BB)

This Pentek CFB-Plus20BB Water Filter Cartridge Replacement is a 20 inch Big Blue carbon block water filter replacement for use in many water filter systems, especially whole house filter systems. It is an enhanced version of the basic Pentek CFB-20


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Pentek CFB-Plus20BB Filter - 20" Big Blue Carbon
Our Price: $44.99
Retail: $55.99
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Watts 5 Micron 20" Coconut Carbon Water Filter
(WCBCFF20)

The Watts 5 Micron 20" Coconut Carbon Filter Cartridge (Watts WCBCFF20) is a 20"L x 4 1/2"W coconut carbon block water filter replacement cartridge used primarily in whole house water filter systems to reduce the bad taste and odor of chlor


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Watts 5 Micron 20" Coconut Carbon Water Filter
Our Price: $39.99
Retail: $49.99
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Hydronix SDP-4520 20" Radial Flow Carbon Filter
(SDP-4520)

The Hydronix SDP-4520 20" Radial Flow Carbon Filter fits most 20 inch filter housings.


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Hydronix SDP-4520 20" Radial Flow Carbon Filter
Our Price: $39.99
Retail: $49.99
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Pentek FloPlus-20BB Filter - 20" Big Blue Carbon
(FloPlus-20BB)

This Pentek FloPlus-20BB Filter is a 20 inch Big Blue carbon block water filter for use in many water filter systems, especially whole house filter systems. The Pentek 455906-43 is a Big Blue filter (4 1/2" diameter) that features a much higher flow


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Pentek FloPlus-20BB Filter - 20" Big Blue Carbon
Our Price: $69.99
Retail: $98.44
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KX Matrikx +Pb1 06-425-200-20 Filter
(06-425-200-20)

The KX Matrikx +Pb1 06-425-200-20 Filter is a KX Matrikx "Premier Performer," reducing lead, cysts, chlorine, taste & odors, and sediment from your water. 20" Filter Cartridge.


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KX Matrikx +Pb1 06-425-200-20 Filter
As Low As: $67.40
Retail: $99.00
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Liquatec CB-450-20-05 Compatible Carbon Filter
(CB-450-20-05)

The Liquatec CB-450-20-05 Carbon Filter can be used to reduce chlorine, taste & odor, sediment, and certain VOC's from your water. Great cost-to-performance value!


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Liquatec CB-450-20-05 Compatible Carbon Filter
As Low As: $22.25
Retail: $59.47
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Pentek CRFC20-BB Radial Flow Carbon Filter, 155967
(CRFC20-BB)

The Pentek CRFC20-BB Radial Flow Carbon Filter is ideal for chloramine taste & odor reduction in POE (Point-of-Entry) and other high-flow rate applications. The CRFC20-BB reduces chlorine, chloramine, taste & odor, and particulates from your water.

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Pentek CRFC20-BB Radial Flow Carbon Filter, 155967
As Low As: $93.57
Retail: $173.70
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Watts C-MAX Carbon Block 20" Large Filter
(MAXETW-FF20)

The Watts C-MAX Carbon Block 20" Filter Cartridge (Watts MAXETW-FF20) is a 20" x 4 1/2" carbon block water filter replacement cartridge used in various water filter systems to reduce the bad taste and odor of chlorine as well as many common


In stock! Ships in 1 business day.
Watts C-MAX Carbon Block 20" Large Filter
Our Price: $69.99
Retail: $78.90
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Hydronix 20 x 4.5 Inch GAC Water Filter Cartridge
(UDF-20BP H)

The Hydronix 20" Large GAC Water Filter Cartridge (UDF-20BP H) iThe Hydronix 20" Large GAC Water Filter Cartridge (UDF-20BP H) is a water filter that is both quality made and of competitive cost. This carbon water filter is used to effectively


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Hydronix 20 x 4.5 Inch GAC Water Filter Cartridge
Our Price: $39.50
Retail: $53.40
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Hydronix 20" x 4.5" Carbon Filter - 1 Micron
(CB-45-2001)

The Hydronix 20" Carbon Filter (Hydronix CB-45-2001) is a carbon block cartridge replacement built for various filtration needs. This 20" carbon filter has a 1 micron rating and is versatile enough to be used in food services, commercial an


In Stock! Ships in 1 to 2 business days.
Hydronix 20" x 4.5" Carbon Filter - 1 Micron
Our Price: $54.99
Retail: $83.08
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Watts 10 Micron 20" x 4.5" KDF / GAC Filter
(IF-SM-KDF020B)

The Watts 10 Micron 20" KDF / GAC Filter Replacement Cartridge (Watts IF-SM-KDF020B) is a 20 inch GAC and KDF filter replacement for use in many water filtration systems, especially whole house filter systems. The Watts IF-SM-KDF02

Free shipping within the continental United States!

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Watts 10 Micron 20" x 4.5" KDF / GAC Filter
Our Price: $119.00
Retail: $199.99
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Watts 20" x 4.5" GAC Filter Cartridge - WW
(GAC-BB20)

The Watts 20" GAC Filter Cartridge (GAC-BB20) is a water washed (WW) granular activated coconut carbon water filter replacement cartridge used to reduce the bad taste and odor of chlorine in whole house filtration systems as well as a varie


Out of stock
Watts 20" x 4.5" GAC Filter Cartridge - WW
Our Price: $41.00
Retail: $59.99
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Hydronix 20" x 4.5" Carbon Filter - 10 Micron
(CB-45-2010)

The Hydronix 20" Carbon Filter (Hydronix CB-45-2010) is a carbon block cartridge replacement that reduces impurities that can sometimes be found in water. The 20" carbon block filter accomplishes this by having a 10 micron rating and by bei


In stock! Ships in 1 business day.
Hydronix 20" x 4.5" Carbon Filter - 10 Micron
Our Price: $43.97
Retail: $49.95
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Watts FPIR-BB-20 - 20" x 4.5" Iron Filter
(FPIR-BB-20)

The Watts FPIR-BB-20 20" Iron Filter Replacement Cartridge thoroughly reduces up to 3 PPM of dissolved iron from water. The Watts FPIR-BB-20 improves the metallic taste caused by too much iron in water - it will also reduce the orange and b


In stock! Ships in 1 business day.
Watts FPIR-BB-20 - 20" x 4.5" Iron Filter
Our Price: $75.95
Retail: $99.99
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Pentek ChlorPlus-20BB - 20" Chloramine Big Blue
(ChlorPlus-20BB)

This Pentek ChlorPlus-20BB Chloramine Filter Cartridge Replacement is a 20 inch carbon block chloramine water filter for use in many water filter systems, especially whole house filter systems. The Pentek 355753-43 is a Big Blue filter (4 1/2" diame

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Pentek ChlorPlus-20BB - 20" Chloramine Big Blue
Our Price: $99.99
Retail: $141.94
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Aqua-Flo Radial Flow Carbon Cartridge 20"x 4.5"
(RF-20BV)

The Aqua Flo RF-20BV is a water filter cartridge that fits the following water filtration systems: All systems that require a 4.5 inch x 20 inch filter The Aqua-Flo Radial Flow Carbon Cartridge 20"x 4.5" is a granular activated carbon (GAC) fi


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Aqua-Flo Radial Flow Carbon Cartridge 20"x 4.5"
Our Price: $34.13
Retail: $39.99
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3M Aqua-Pure AP917R Compatible Water Filter
(5621003)

The 3M Aqua-Pure AP917R Water Filter is a replacement filter cartridge for the 3M Aqua-Pure AP903 Whole House Filter System. It is one of the best whole house water filter cartridges on the entire water filter market. The 3M Aqua-Pure AP917R water f

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3M Aqua-Pure AP917R Compatible Water Filter
Our Price: $145.22
Retail: $199.99
You Save 27%!

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Filters Fast - 20 Inch Big Blue Carbon Filters

" I just received my filters - thank you for the excellent work that you guys do! I'm a very happy customer. " - Mike, San Marcos, TX
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