We are looking to install this in a seasonal cabin, can this be winterized?

Hi Cate, This unit should be protected from direct sunlight or freezing temperature. Depending on the environment in the winter, the housings might become damaged. Please contact us with more details so we can better assist you. iSpring Water Systems 678-261-7611 support@ispringfilter.com

I received this whole house filter and one of the cartridges is broken model fc25b. can i get a replacement of this broken cartridge?

allfilters.com I used iSpring for a while and then the types of filters ordered was so confusing......and its all made in China.......unlike advertised. So I switched to allfilters....now keep in mind that they don’t send one at a time....but the price difference, the nonconfusion, sent by USPS and customer support won me over. ALL MADE IN THE USA! Allfilters also sells the canisters. When ordering filters go by the size ei: 4 1/2” x 20”

Do you still need a water softener with this if hardness is 250 ppm?

Hi there, It's optional but would help p[rolong the life of the filters if you install one. We usually recommend a water softener with TDS higher than 700 PPM. Please let us know if you have other concerns. Stay safe! iSpring Water Systems, LLC

What pressure gauge is recommended to install pre and post filter that will work with 3/4" PEX supply line?

I use the one on a spin down pre filter and a 3/4” shark bite with gauge post filter

iSpring FC25B Whole House Water Filter, CTO Carbon Block, 20” x 4.5” for Sediment & Chlorine Removal

iSpring FC25B Whole House Water Filter, CTO Carbon Block, 20” x 4.5” for Sediment & Chlorine Removal

Product ID: 164795263

Details

Material
Activated
Product dimensions
15.2D x 55.9W
Item weight
2.36 Kilograms
Product benefits
Freshness
Brand
iSpring

⚡Up to 15 GPM flow rate

🌴Premium coconut shell carbon

💧99% chlorine removal

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Description

💧 Elevate your home’s hydration game with crystal-clear confidence!

TRUSTED TESTED - NSF/ANSI certified with lifetime U.S.-based tech support for peace of mind.
PURE WATER PURE POWER - Removes up to 99% of chlorine, odors, and chemicals for crisp, clean water.
ECO FRIENDLY FILTRATION - Crafted from high-quality coconut shell activated carbon for superior contaminant adsorption.
FLOW WITHOUT COMPROMISE - Maintains a robust 15 gallons per minute flow rate to keep your household running smoothly.
PLUG PLAY COMPATIBILITY - Fits all standard 20” x 4.5” whole house filter housings—easy upgrade, zero hassle.

The iSpring FC25B is a 20” x 4.5” whole house carbon block water filter designed to remove up to 99% of chlorine, odors, and harmful chemicals while preserving beneficial minerals. Featuring premium coconut shell activated carbon, it supports a high flow rate of up to 15 GPM and fits standard housings. NSF/ANSI certified and backed by lifetime U.S.-based tech support, it ensures healthier, better-tasting water throughout your home with minimal maintenance.

Specifications

ASIN	B01M1197LW
Best Sellers Rank	833,602 in DIY & Tools ( See Top 100 in DIY & Tools ) 724 in Replacement Under-Sink Water Filters
Brand	iSpring
Customer Reviews	4.6 out of 5 stars 874 Reviews
Global Trade Identification Number	00662425080250
Included Components	1 Whole House CTO Carbon Block
Included components	1 Whole House CTO Carbon Block
Installation Type	Under Sink
Installation type	Under Sink
Item Dimensions L x W x H	15.2L x 15.2W x 55.9H centimetres
Item Type Name	Whole House CTO Carbon Block
Item Weight	2.36 Kilograms
Manufacturer	iSpring Water Systems
Material	Activated carbon
Material Type	Activated carbon
Maximum Flow Rate	15 Gallons Per Minute
Model Name	High Capacity 20” x 4.5” Water Filter
Model Number	1
Other Special Features of the Product	Chlorreduzierung, NSF-zertifiziert
Power Source	Ac
Product dimensions	15.2L x 15.2W x 55.9H centimetres
Purification Method	Carbon Block
Special feature	Chlorreduzierung, NSF-zertifiziert
UPC	662425080250
Unit Count	1.0 Count

Reviews

C**N

Un buen filtro

Buena calidad, algo caro pero adecuado para filtrar el agua de toda la casa

11.09.2025

E**4

Fits

21.06.2025

M**S

Good product

10.03.2026

M**I

Excellent

20.09.2019

B**N

Best Filter I've Tried in 8 Years!

27.06.2020

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