--- product_id: 224733794 title: "F2WGB21B Whole House 4.5\"x10\" Water Filtration High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set, Model: WGB21B" brand: "ispring" price: "$125.50" currency: USD in_stock: true reviews_count: 13 category: "I Spring" url: https://www.desertcart.us/products/224733794-f2wgb21b-whole-house-4-5x10-water-filtration-high-capacity-sediment store_origin: US region: United States of America --- # Coconut shell activated carbon 5-micron sediment filtration Filters up to 50,000 gallons F2WGB21B Whole House 4.5"x10" Water Filtration High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set, Model: WGB21B **Brand:** ispring **Price:** $125.50 **Availability:** ✅ In Stock ## Summary > 🚰 Elevate your home’s water game — because clean water is the new luxury. ## Quick Answers - **What is this?** F2WGB21B Whole House 4.5"x10" Water Filtration High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set, Model: WGB21B by ispring - **How much does it cost?** $125.50 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/224733794-f2wgb21b-whole-house-4-5x10-water-filtration-high-capacity-sediment) ## Best For - ispring enthusiasts ## Why This Product - Trusted ispring brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Crystal Clear Every Drop:** Advanced 5-micron polypropylene sediment filter traps dirt, rust, and scale for pristine water flow. - • **Long-Lasting Performance:** High-capacity filters deliver up to 50,000 gallons of clean water, reducing replacement frequency and hassle. - • **Seamless Whole-House Fit:** Designed to perfectly fit standard 10" filtration systems, ensuring effortless installation and compatibility. - • **Trusted Quality & Support:** Backed by NSF/ANSI certifications, a 30-day money-back guarantee, and lifetime tech support for peace of mind. - • **Pure Taste, Zero Compromise:** Premium coconut shell carbon block eliminates 99% of chlorine, odors, and harmful organic compounds. ## Overview The iSpring WGB21B filter pack features a 5-micron polypropylene sediment filter and a high-quality coconut shell CTO carbon block filter, certified to NSF/ANSI standards. Engineered for whole-house systems, it removes sediment, chlorine, odors, and harmful organics, delivering up to 50,000 gallons of refreshing, contaminant-free water. Compatible with standard 10" housings, it extends appliance life and protects plumbing, all backed by a 30-day warranty and lifetime support. ## Description 5 micron 10-in x 4.5-in polypropylene sediment melt blown filters. Dimensions: length 10-in, outer diameter 4.5-in, inner diameter 1-1/8-in, filter life: 10,000 gallons. Max operating pressure: 60 psi. CTO filter features usually used as second stage for the whole house filter. The carbon block filter is manufactured by continuous extrusion process. It consists of a high quality virgin premium performance activated carbon. It is effective in reducing free chlorine, bad taste, odor THM, organics, hazardous chemicals, and pesticides. Depending on inlet water quality or flow rate, it needs to be replaced every 6 months or 18,000 gallons of water. Fits standard 10 inch whole-house water filters. Review: I buy these regularly, they’re great! - I’ve been using these filters for years with great results. Always fit perfectly, they do a great job of filtering with an odor free result. The flow rate/psi differential stays at ~8 to 10 psi until they need changing out. They last a long time. They never come apart and are simple to replace. Review: Great Filter System, Great Filter Cartridges - I use about 2500-3000 gallons a month for my entire house which runs thru this filtering system. I change out the filters every 6 months. According to their recommendations, I am changing them sooner than I need to. My water is crisp clear and clean. It's convenient to buy them here and they ship without much delay. I have had excellent luck with this system and these replacement cartridges. ## Features - [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. - [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 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. - [Great Compatibility] This filter pack consists of 1x 10"x4.5"Sediment Filter(FP15B) and 1x 10"x4.5" CTO filter(FC15B). 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 guarantee, extended manufacturer warranty, and lifetime tech support from iSpring in Atlanta, GA at (678) 261-7611. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07HYB2TZ6 | | Best Sellers Rank | #2,957 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Whole House Water Treatment Systems | | Brand Name | iSpring | | Compatible Water Purifier Models | iSpring WGB21B | | Customer Reviews | 4.7 4.7 out of 5 stars (369) | | External Testing Certification | ANSI, NSF | | Global Trade Identification Number | 00810004170223 | | Included Components | 4.5" x 10" CTO Filter X1, 4.5" x 10" PP Sediment Filter X1 | | Item Dimensions D x W x H | 9"D x 4.5"W x 10"H | | Item Type Name | Whole House 4.5"x10" Water Filtration High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set for WGB21B | | Item Weight | 1.36 Kilograms | | Manufacturer | iSpring Water Systems | | Manufacturer Part Number | F2WGB21B | | Manufacturer Warranty Description | 30 day warranty | | Material Type | Polypropylene, Coconut Shell Carbon | | Model Number | iSpring-WGB21B | | Number of Items | 2 | | Product Benefits | Provides clean and refreshing water by removing impurities chlorine, prolongs appliance life, protects plumbing | | Set Name | Chlorine | | UPC | 810004170223 | | Unit Count | 1.0 Count | ## Product Details - **External Testing Certification:** ANSI, NSF - **Item Weight:** 1.36 Kilograms - **Material:** Polypropylene, Coconut Shell Carbon - **Product Dimensions:** 9"D x 4.5"W x 10"H ## Images ![F2WGB21B Whole House 4.5"x10" Water Filtration High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set, Model: WGB21B - Image 1](https://m.media-amazon.com/images/I/61Rn2dOh67L.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ I buy these regularly, they’re great! *by S***R on January 6, 2026* I’ve been using these filters for years with great results. Always fit perfectly, they do a great job of filtering with an odor free result. The flow rate/psi differential stays at ~8 to 10 psi until they need changing out. They last a long time. They never come apart and are simple to replace. ### ⭐⭐⭐⭐⭐ Great Filter System, Great Filter Cartridges *by S***H on February 5, 2026* I use about 2500-3000 gallons a month for my entire house which runs thru this filtering system. I change out the filters every 6 months. According to their recommendations, I am changing them sooner than I need to. My water is crisp clear and clean. It's convenient to buy them here and they ship without much delay. I have had excellent luck with this system and these replacement cartridges. ### ⭐⭐⭐⭐⭐ A picture is worth MORE than a thousand words *by J***N on November 7, 2024* You have a choice here. Read my extremely well written review, *OR* just look at the picture. Either one will lead you to the very same conclusion: "these things really work!". The water around the Austin, Texas area is notoriously bad, so the water softener business is thriving. The problem is that no one in our family likes the "feel" of softened water, yet we knew we badly needed something. Clearly (pun intended) we were right! I had the actual filtration system professionally installed, but I replace the filters myself. Very easy to do, priced right, and again they work great. We highly recommend this product. ## Frequently Bought Together - iSpring F2WGB21B Whole House 4.5"x10" Water Filtration High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set, Model: WGB21B - iSpring WGB21B 2-Stage Whole House Water Filtration System, with 10" x 4.5" Sediment CTO(Chlorine, Taste, and Odor) Filter, 1" Inlet/Outlet - iSpring FP15B Sediment Filter Replacement Cartridge for Whole House Water Filtration Systems, High Capacity 5-Micron Premium PP, 4.5" x 10", White --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/224733794-f2wgb21b-whole-house-4-5x10-water-filtration-high-capacity-sediment](https://www.desertcart.us/products/224733794-f2wgb21b-whole-house-4-5x10-water-filtration-high-capacity-sediment) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-23*