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

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💧 Elevate your home’s water game — because your family deserves the freshest flow!

PURE WATER PURE POWER - Removes up to 99% of chlorine, odors, and chemicals for crisp, clean water throughout your home.
FLOW WITHOUT COMPROMISE - Maintains a robust water flow of up to 15 gallons per minute, ensuring no slowdown in your daily routine.
PREMIUM FILTRATION TECH - Crafted from high-quality coconut shell activated carbon for maximum contaminant adsorption and long filter life.
NSF CERTIFIED RELIABILITY - Independently tested to meet NSF/ANSI standards, guaranteeing trusted, safe water filtration.
LIFETIME SUPPORT ZERO WORRIES - Register for lifetime U.S.-based tech support and enjoy peace of mind with every filter change.

The iSpring FC25B is a high-capacity 20" x 4.5" whole house carbon block water filter that removes up to 99% of chlorine, odors, and chemicals using premium coconut shell activated carbon. It supports a strong flow rate of up to 15 GPM, fits standard housings, and is NSF/ANSI certified for reliable performance. Designed to preserve healthy minerals, it comes with lifetime U.S.-based tech support for hassle-free maintenance.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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€ 354.55

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TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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Brand	iSpring
Special Feature	ro
Power Source	Ac
Model Name	High Capacity 20” x 4.5” Water Filter
Maximum Flow Rate	5 Gallons Per Minute
UPC	662425080250
Global Trade Identification Number	00662425080250
Manufacturer	iSpring Water Systems
Model number	FC25B
Colour	Gray
Number of Memory Sticks	1
Item Weight	2 kg 360 g
Product Dimensions	11.43 x 11.43 x 50.8 cm; 2.36 kg
Item model number	FC25B
Item Height	20 Inches
Item Width	4.5 Inches
Are batteries included?	No

iSpring FC25B NSF Certified High Capacity Big Blue Whole House Water Filter CTO Carbon Block, 4.5" x 20"

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