Thank you for your question! The size of the filter is 4.5 inch (diameter) x 10 inch (length). Best, iSpring Water Systems LLC

iSpring FC15B Big Blue Whole House Water Filter with CTO Carbon Block, 4.5" x 10"

iSpring FC15B Big Blue Whole House Water Filter with CTO Carbon Block, 4.5" x 10"

Q: Using ispring dual stage set up. would 2 of these filters work best to remove chlorine from municipal water? the water is clean but chemical laden.

Thanks for your interest in the iSpring whole-house water filter. Knocks out cloudiness as well as bad tastes and odors remove up to 99% of chlorine, and is effective on herbicides and industrial solvents, and other contaminants like trihalomethanes. Steady flow and high absorption. Filters up to 50,000 gallons depending on the use and feed water quality. Replace the filter every 6 months or every 50,000 gallons of water for ideal performance, depending on the quality of source water and daily water consumption. If you have other questions, please call us at 678-261-7611 (M-F, 8:30 - 5:30 EST), text us at 470-560-0012 (M-F, 8:30 - 5:30 EST), or email us at support@123filter.com. We are happy to help.

Q: Do you have to rinse/flush the carbon filter before installing it in the whole house system? If yes, what’s the way to do so? Thank you

Hi TC, You can flush the filter after installation. Just open the nearest tap and let it run until the water is clear or when all the carbon residue is out. Please reach out to our customer service team for additional questions. We're always ready to help. iSpring Water Systems, LLC

Q: is there a catalyitic carbon filter avaiable to remove chloramines?

Chloramine is removed from water with essentially the same strategies that are used to remove chlorine. This means that carbon filtration is the best removal method and filter carbon does indeed remove chloramine. The problem is that it takes more carbon and more contact time to do the job. In practical terms this means that if your City disinfects your tap water with chloramines you'll need to get a larger and better carbon filter than you would need if chlorine alone were used. All our products use activated carbon so are capable of removing chloramine.

Product ID: 295677087

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Details

Brand
iSpring
Installation Type
Under Sink
Item Weight
2.7 Pounds
Model Name
FC15B High CTO
UPC
662425080212

🌿Premium coconut shell carbon

💧Filters up to 50,000 gallons

⚙️Fits standard 10" Big Blue systems

Frequently Bought Together

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

iSpring FP15B Sediment Filter Replacement Cartridge for Whole House Water Filtration Systems, High Capacity 5-Micron Premium PP, 4.5" x 10", White

iSpring WGB21B 2-Stage Whole House Water Filtration System, with 10" x 4.5" Sediment CTO(Chlorine, Taste, and Odor) Filter, 1" Inlet/Outlet

Description

💧 Elevate your home’s water game with iSpring’s Big Blue powerhouse!

FRESHNESS SEALED IN - Individually wrapped cartridges guarantee peak filter efficiency and freshness on arrival.
SEAMLESS COMPATIBILITY - Official replacement for iSpring Big Blue whole house & under sink systems—easy swap, zero hassle.
ENGINEERED FOR PERFORMANCE - Low pressure drop with steady flow and no carbon fines ensures smooth, reliable water delivery.
BUILT TO LAST FILTER LONGER - High-capacity CTO carbon block delivers up to 50,000 gallons or 6 months of premium filtration.
PURE REFRESHMENT EVERY DROP - Removes up to 99% chlorine, odors & harmful organics for crisp, clean water throughout your home.

The iSpring FC15B Big Blue Whole House Water Filter features a premium coconut shell activated carbon block CTO cartridge designed to remove up to 99% of chlorine, odors, and harmful organic compounds. Engineered for steady flow and long life, it filters up to 50,000 gallons or 6 months, fitting standard 10" x 4.5" Big Blue systems. Individually sealed for freshness and backed by lifetime support, it ensures clean, refreshing water at every faucet.

Specifications

Brand	iSpring
Installation Type	Under Sink
Item Weight	2.7 Pounds
Model Name	FC15B High Capacity Activated CTO Carbon Block Filter Replacement Cartridge
UPC	662425080212
Global Trade Identification Number	00662425080212
Manufacturer	iSpring Water Systems
Model number	1
Colour	Big Blue 5-Micron 10"x4.5"
Number of Memory Sticks	1
Item Weight	1 kg 220 g
Product Dimensions	11.43 x 11.43 x 25.4 cm; 1.22 kg
Item model number	1
Item Height	10 Inches
Item Width	4.5 Inches
Are batteries included?	No
External Certification	NSF

Have a Question? See What Others Asked

Using ispring dual stage set up. would 2 of these filters work best to remove chlorine from municipal water? the water is clean but chemical laden.

Do you have to rinse/flush the carbon filter before installing it in the whole house system? If yes, what’s the way to do so? Thank you

How Big Is It?

is there a catalyitic carbon filter avaiable to remove chloramines?

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