iSpring F4WGB21B Whole House Water Filtration High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set for WGB21B, 4.5"x10"
iSpring F4WGB21B Whole House Water Filtration High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set for WGB21B, 4.5"x10"
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About This
- [Exceptional Filter Life] This filter pack can filter up to 50,000 gallons depending on the use and feed water quality. Replace the filters every 3-6 months to achieve optimal performance. 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.
- [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 standard((NSF/ANSI 42) for material safety and water quality, iSpring premium 5-micron polypropylene sediment filter (FP15B) captures dirt, sand, silt, dust, rust, 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.
- [Highly Activated Carbon Block CTO Filter] Using high quality coconut shell carbon and highly compact fabrication tech, iSpring CTO filter(FC15B) 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 Filters(FP15B) and two 10"x4.5" CTO filters(FC15B). Official replacement filter cartridges for iSpring whole house water filtration system WGB21B. Fits standard 10" whole house water filtration systems. Individually sealed for freshness.
- [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.
Overview
- Material : Coconut Shell Carbon, Polypropylene (PP)
- Product Dimensions : 4.5"D x 4.5"W x 10"H
- External Testing Certification : ANSI, NSF
- Product Benefits : Filters up to 50,000 gallons, uses premium quality material, captures impurities, and prolongs appliance life Filters up to 50,000 gallons, uses premium quality material, captures impurities, and prolongs appliance life
- Brand : iSpring

Experience the difference clean, softened water makes in your daily life — from healthier skin to better tasting drinking water.
👉 Softer skin and smoother hair with every shower.
👉 Prevent scale buildup and keep your appliances running efficiently.
👉 Softer, brighter clothes that last longer with every wash.
See the Difference in Your Water — Instantly
Hard water, chlorine, and hidden contaminants can affect your health, skin, and appliances.
Our advanced filtration system removes impurities and delivers clean, safe water throughout your entire home.
Feel the difference in every drop — from your kitchen to your shower.
FAQ
Water Filtration & Home Water Guide