Top 10 WGB21B Filters – Replacement Under-Sink Water Filters

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1. iSpring

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ISpring F4WGB21B Whole House Filtration High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set for WGB21B, 4 Count Pack of 1, 4.5"x10", White

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iSpring #ad - Highly activated carbon block cto filter using high quality coconut shell carbon and highly compact fabrication tech, iSpring CTO filterFC15B knocks out cloudiness as well as bad tastes and odors, removes up to 99% of chlorine, and is highly effective on organic compounds like herbicides, and industrial solvents and other contaminants like trihalomethanes.

Great compatibility this filter pack consists of two 10"x4. 5"sediment filtersfp15b and two 10"x4. 5" cto filtersFC15B. Fine pp sediment filters and premium quality ctO filters not only bring clean and refreshing water to every faucet in your home, but also help prolong the lives of your water-using appliances and protect plumbing from sediment and scale buildup. Fits standard 10" whole house water filtration systems. The polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. Premium quality material and multi-layer density tech complying strictly with fda standard cfr-part 177 and tested by independent third party against NSF/ANSI standardNSF/ANSI 42 for material safety and water quality, sand, rust, iSpring premium 5-micron polypropylene sediment filter FP15B captures dirt, silt, dust, and scale particles and extends the life of CTO carbon block filter.

Replace the filters every 3-6 months to achieve optimal performance. Official replacement filter cartridges for iSpring whole house water filtration system WGB21B. Peace-of-mind customer support your risk-free shopping experience is backed by a 30-day money-back, extended manufacturer, and lifetime CS and tech support from iSpring in Atlanta, GA.
BrandiSpring #ad
ManufactureriSpring Water Systems,LLC #ad
Height10 Inches
Length9 Inches
Width9 Inches
Part NumberF4WGB21B
ModelF4WGB21B
Warranty30-Day Money-Back Guarantee; Extended Warranty Upon Warranty Registration; Lifetime CS and Tech Support from Atlanta, GA.

2. iSpring

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ISpring F2WGB21B Whole House 4.5"x10" Water Filtration High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set for WGB21B

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iSpring #ad - Great compatibility this filter pack consists of 1x 10"x4. 5"sediment filterFP15B and 1x 10"x4. 5" cto filterFC15B. Premium quality material and multi-layer density tech complying strictly with fda standard cfr-part 177 and tested by independent third party against NSF/ANSI standardNSF/ANSI 42 for material safety and water quality, rust, dust, sand, silt, iSpring premium 5-micron polypropylene sediment filter FP15B captures dirt, and scale particles and extends the life of CTO carbon block filter.

The polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. Replace the filters every 3-6 months to achieve optimal performance. Fine pp sediment filter and premium quality cto filter not only bring clean and refreshing water to every faucet in your home, but also help prolong the lives of your water-using appliances and protect plumbing from sediment and scale buildup. Individually sealed for freshness. Peace-of-mind customer support your risk-free shopping experience is backed by a 30-day money-back guarantee, and lifetime tech support from iSpring in Atlanta, extended manufacturer warranty, GA at 678 261-7611.

Highly activated carbon block cto filter using high quality coconut shell carbon and highly compact fabrication tech, iSpring CTO filterFC15B knocks out cloudiness as well as bad tastes and odors, removes up to 99% of chlorine, and is highly effective on Organic Compounds like herbicides and industrial solvents and other contaminants like trihalomethanes. Exceptional filter life this filter pack can filter up to 50, 000 gallons depending on the use and feed water quality.
BrandiSpring #ad
ManufactureriSpring Water Systems #ad
Height4.5 Inches
Length10 Inches
Weight3 Pounds
Width4.5 Inches
Part NumberF2WGB21B
ModelF2WGB21B
Warranty30 day warranty

3. iSpring

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5-Micron 10"x4.5", iSpring FC15B High Capacity Activated CTO Carbon Block Filter Replacement Cartridge for Under Sink and Whole House Water Filtration System

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iSpring #ad - Peace-of-mind customer support your risk-free shopping experience is backed by a 30-day money-back guarantee and lifetime tech support from iSpring in Atlanta, GA. Steady flow and high absorption. Replace the filter every 6 months or every 50, 000 gallons of water for optimal performance.

Premium quality material using high-quality coconut shell carbon and highly compact fabrication tech, Taste, this highly activated carbon block CTOChlorine, and Odor filter cartridge is designed and produced to achieve maximum filtration efficiency and filter life for 10" Under Sink Water Filter and Whole House Water Filtration Systems. Free of surfactants, binders, and adhesives. Exceptional filtration performance knocks out cloudiness as well as bad tastes and odors, removes up to 99% of chlorine, and is highly effective on Organic Compounds like herbicides, and industrial solvents and other contaminants like trihalomethanes.

Long filter life filters up to 50, 000 gallons depending on the use and feed water quality. Great compatibility official replacement filter for ispring under sink water filter system US21B and Whole House water filtration systemsWGB21B, WGB21BM, and WGB21B-PB. Usually used as the second stage filter for whole house water filtration systems, FC15B brings clean and refreshing water to every faucet in your home. Individually sealed for freshness. No leaching carbon ash. Fits other standard 10" x 4.
BrandiSpring #ad
ManufactureriSpring Water Systems #ad
Height10 Inches
Length4.5 Inches
Weight0.9 Pounds
Width4.5 Inches
Part NumberFC15B
ModelFC15B
Warranty30-Day Money Back Guarantee and Extended Warranty upon Registration. Lifetime CS and tech support from Atlanta, GA.

4. SimPure

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WGB21B, FXHTC, 150237, 2-Pack, BB-10, FC15B, SimPure 5 Micron 10 x 4.5-inch Whole House Carbon Water Filter Big Replacement Cartridges for Blue Housing and Systems DB10P, GXWH35F, GE GXWH40L

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SimPure #ad - Pure water for home this big carbon filter cartridge is made of pure coconut shell charcoal block, wrapped in a food-grade polypropylene non-woven fabric to achieve fine water filtration while avoiding carbon particles leaking into the water. Tested by independent third-party to meet NSF 42 Standards for material safety. High capacity, 000 gallons of water depending on usage and local water quality.

5 micron fine filtration optimized to perform as both a sediment and carbon block filter, bad tastes, it filters out contaminants down to 5 microns, the smell, removes undesirable colors, and up to 98% of chlorine from well water and municipal water, significantly improving water quality for the whole house. Universal replacement filter cartridge the standard size makes our cto filter an ideal replacement for sediment and carbon cartridges including fc15b, liquatec CB-450-975-05, DuPont WFHDC8001, CTO2-HD10, clearChoice 84629, AP817, Watts MAXETW-FF975 WCBFF975, WDGD-5005, Pelican CB-BB-10, PP10BB-CC, 155548-43 ep-bb epm-bb cbc-bb, etc.

Wide compatibility fits most of the big 4. 5x10-inch blue and clear filter housings approx. Outer diameter 7″ at the top and 10-inch whole house water systems including but not limited to: simpure db10, w10-pr, american Plumber W15-PR, WGB21B, HF45 series, HB18B, AP801T, GXWH40L, AP801B, DB10P, GE GXWH35F, etc. Suggest replacing it every 3-6 months for the average household for optimal performance. The high porosity design helps prevent the cartridge from clogging before its adsorption capability is exhausted, Long Lasting Our carbon filter can filter up to 15, maximizing the utilization of the carbon while maintaining a lower pressure drop.
BrandSimPure #ad
ManufacturerSimPure #ad
Height10 Inches
Length4.5 Inches
Width4.5 Inches
Part NumberRSCTO002Z_2S8
ModelCTO-F10B-5

5. iSpring

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Ultra High Capacity, White, 10"x4.5", 4.5"x4.5"x10", iSpring FCRC15B Lead Reducing Replacement Filter, Fits Whole House Water Filtration System WGB21B-PB

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iSpring #ad - Protect your family and household appliance from lead our filter fcrc15b is specially designed for reducing lead. It also has a minimum impact on water flow up to 15 GPM and requires minimum maintenance.

It features a high capacity of 80, 000 gallons of water, effectively reducing lead level from 100 ppb to 15 ppb the EPA standard for drinking water and less. Great compatibility being a perfect 2nd stage filter for iSpring WGB21B-PB, FCRC15B also fits standard 10” x 4. 5” housings from most brand name models. If you are interested in a filter that removes TDS, please consider our iSpring RO systems.

Easy to maintain the cartridge lasts up to 3 times longer than conventional media. Tds note unlike an ro system, this system will not reduce total dissolved Solids TDS, and instead keeps healthy minerals in your water. Top-notch customer service backed by a 30-day money-back and extended manufacturer upon registration at iSpring. Lifetime tech support from Atlanta, GA.
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ManufactureriSpring #ad
Height10 Inches
Length4.5 Inches
Width4.5 Inches
Part NumberFCRC15B
ModelFCRC15B
WarrantyWarranty and Support: By default every iSpring whole house water filtration system comes with thirty-day money back policy and one-year limited manufacturer warranty. We care and love to help customers. Besides DIY videos on YouTube and Knowledge Base on our website, we provide lifetime customer service from Atlanta, GA. Please don't hesitate to reach out to us before and after your purchase. Your satisfaction is our business!

6. iSpring

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5-Micron Universal Coconut Shell High Capacity CTO Filter for Under Sink and Whole House Water Filtration Systems, iSpring FC15BX4 4.5" x 10" Carbon Block Water Filter Replacement Cartridge, Pack of 4

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iSpring #ad - Free of surfactants, binders, this highly activated carbon block CTOChlorine, Taste, and adhesives. Official 2nd stage carbon block replacement filter cartridge for iSpring under sink water filter US21B and whole house water filtration system WGB21B; 1st stage for WGB21BM and WGB21B-PB. Great compatibility fits standard 10"x4.

5" filters. Replace the filter every 6 months or every 50, depending on the quality of source water and daily water consumption. Long filter life each cartridge filters up to 50, 000 gallons of water for optimal performance, 000 gallons depending on the use and feed water quality. Premium quality material using high-quality coconut shell carbon and highly compact fabrication tech, and Odor filter cartridge is designed and produced to achieve maximum filtration efficiency and filter life for 10" Whole House Water Filtration Systems.

Peace-of-mind customer support your risk-free shopping experience is backed by a 30-day money-back guarantee, and lifetime tech support from iSpring in Atlanta, extended warranty upon registration, GA. Exceptional filtration performance knocks out cloudiness as well as bad tastes and odors, removes up to 99% of chlorine, and is highly effective on organic compounds like herbicides and industrial solvents and other contaminants like trihalomethanes. Steady flow and high absorption. No leaching carbon ash. All 4 cartridges are individually sealed for freshness.
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ManufactureriSpring #ad
Height10 Inches
Length5 Inches
Width5 Inches
Part NumberFC15BX4
ModelFC15BX4
WarrantyExtended Warranty upon Registration and Lifetime CS and Tech Support from Atlanta, GA.

7. AppliaFit

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AppliaFit O-Rings Compatible with Pentek 151122 for Big Blue Water Filters and More 6-Pack

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AppliaFit #ad - Also compatible with water filter brands ace Hardware, AO Smith, Ametek Kleen-Plus, American Plumber, Aqua-Flo and Mulligan. Made from heavy Duty Materials for Durability and Performance. See description for model numbers. Compatible with pentek #10 and #20 Big Blue Water Filter Housings. 6-pack of filter Housing O-Rings. Compatible with Pentek 151122.
BrandAppliaFit #ad
ManufacturerAppliaFit #ad
Part NumberAF-0100
Model151122

8. PUREPLUS

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PUREPLUS 5 Micron 10" x 4.5" Whole House Sediment and Carbon Water Filter Replacement Cartridge for GE FXHTC, PP10BB-CC, 2Pack, GXWH35F, WRC25HD, Culligan RFC-BBSA, Pentek RFC-BB, GXWH40L, GNWH38S

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PUREPLUS #ad - Let it bring a wonderful cleaner water experience to your loved ones. Suggest to replace it every 3- 6 months for the average household for optimal performance depending on the use. If your water source is well water, rohs, sediment, sand, Australia Water Mark, TUV, rust, BPA FREE Certified.

The multi-layer density tech can capture impurities targetedly and have 30% longer service life than the other common type. High capacity - the filter can filter up to 30000 gallons depending on water quality. The filter reduces up to 99% of Chlorine, this filter may not achieve the filtering effect you expect. This kind of filter is recommended for tap water filtration. Multi-layer density tech - the whole house water filter is designed with density three PP layers and Coconut Shell Activated Carbon Layer to remove most contaminants and deliver great fresh water.

Every year it provides filtration solutions to more than 200 million family worldwide, uses advanced filtration technology to ensure high quality water. Why pureplus - pureplus has 20 years of expertise and 200 patents in the water filtration industry. Check out our another product. Search “b01n9024nf” for well water filtration. Trust us, make PUREPLUS your resolution.
BrandPUREPLUS #ad
Height9.8 Inches
Length4.5 Inches
Weight3.51 Pounds
Width4.5 Inches
Part Number43308-2371
ModelPP10BB-CC

9. iSpring

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ISpring F2WGB21BPB Whole House 4.5"x10" Water Filtration CTO Carbon Block and Lead Reducing Water Filter Replacement Cartridge Pack Set

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iSpring #ad - Depending on source water quality, replace the filters every 6 months to achieve optimal performance. Lead reducing designed for lead reducing, it features a filtration capacity of up to 80, lead, 000 gallons of water, reducing lead level from 100 ppb to 15 ppb and less.

Together with 1st stage CTO filter, it protects your family from iron, and more. If you're interested in systems that removes TDS, RCC7, please consider our iSpring Reverse Osmosis systems such as RO500, etc. Activated cto filter high quality coconut shell carbon and highly compact fabrication tech, removes up to 99% of chlorine, CTO filter knocks out cloudiness & odors, and is highly effective on Organic Compounds like herbicides and industrial solvents. Great compatibility as the official replacement filter set for ispring 10"x4.

5” whole house water filtration system WGB21B-PB, this filter pack consists of one 10"x4. 5" carbon block filterFC15B, one 10"x4. 5" lead reducing filterFCRC15B. Easy filter change individually sealed for freshness. Please refer to our manual and our helpful YouTube videos for filter change tips if needed. Tds note unlike ro systems, it does not reduce total dissolved solids tds and instead keeps healthy minerals in your water.
BrandiSpring #ad
ManufactureriSpring Water Systems #ad
Height10 Inches
Length9 Inches
Weight6.48 Pounds
Width4.5 Inches
Part NumberF2WGB21BPB
ModelF2WGB21BPB
Warranty30-Day Money-Back Guarantee; Extended Manufacturer Warranty Upon Warranty Registration; Lifetime CS and Tech Support from Atlanta, GA.

10. iSpring

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ISpring FM15B Iron and Manganese Reducing Replacement Filter Cartridge for Whole House Water Filtration System WGB21BM, 10"x4.5" High Capacity, 1 Count Pack of 1

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iSpring #ad - Efficient performance higher linear velocities than conventional media deliver high flow rates and very low pressure drop. Pressure impact: up to 5 psi drop at a flow rate of 8. Effectively removes harmful substances, improves water quality and protects family health.

Gpm flow rate: 4 - 8 GPM. Powerful iron & manganese reducing ispring fm15b is specially designed for iron & manganese removal, reducing iron Max 3. 0 ppm down to 001 ppm and manganese Max 1. 0 ppm down to 001 ppm. Lasts up to 3 times longer than green sand due to the catalytic media not being consumed in the process. Peace-of-mind customer service register online to activate your extended manufacturer warranty and life-time free tech support from U.

S. Feed water pressure: 20 - 100 psi. We stand behind our products. Local support team. High quality product manufactured to comply strictly with FDA standards and tested by independent third party against NSF/ANSI standards for water quality, material safety and structural integrity. Excellent stability and durability stable and satisfactory performance at a wider ph range 5. 8 - 8.
BrandiSpring #ad
ManufactureriSpring #ad
Height10 Inches
Length4.5 Inches
Width4.5 Inches
Part NumberFM15B
ModelFM15B
WarrantyWarranty and Support: By default every iSpring whole house water filtration system comes with thirty-day money back policy and one-year limited manufacturer warranty. We care and love to help customers. Besides DIY videos on YouTube and Knowledge Base on our website, we provide direct customer service from Atlanta, GA. Please don't hesitate to reach out to us before and after your purchase. Your satisfaction is our business!