--- product_id: 286612489 title: "F21KU75" brand: "ispring" price: "$870.44" currency: USD in_stock: null reviews_count: 5 url: https://www.desertcart.us/products/286612489-f21ku75 store_origin: US region: United States of America --- # Quick push-fit filter replacement 75 GPD high flow rate 97% TDS rejection for pure water F21KU75 **Brand:** ispring **Price:** $870.44 **Availability:** ❌ Out of Stock ## Summary > 💧 Elevate your hydration game with premium purity and effortless freshness! ## Quick Answers - **What is this?** F21KU75 by ispring - **How much does it cost?** $870.44 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/286612489-f21ku75) ## 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 - • **Alkaline Mineral Boost:** Restore essential calcium, magnesium & potassium for balanced, refreshing hydration. - • **Effortless Quick-Connect:** Push-fit design slashes filter replacement time—no plumber needed, no mess. - • **2-Year High-Capacity Pack:** Enjoy uninterrupted crystal-clear water for 24 months without hassle. - • **7-Stage Advanced Filtration:** From sediment to UV sterilization, every sip is ultra-purified and mineral-rich. - • **Trusted Compatibility & Support:** Perfect fit for RCC7AK-UV systems with top-rated customer service backing you up. ## Overview The iSpring F21KU75 is a comprehensive 21-piece, 2-year replacement filter set designed for 7-stage reverse osmosis alkaline UV water systems. Featuring a 75 gallons per day Thin Film Composite membrane with 97% TDS rejection, it delivers crisp, mineral-balanced alkaline water enhanced with natural calcium, magnesium, and potassium. The quick push-fit connectors enable fast, mess-free filter swaps, ensuring your RCC7AK-UV system consistently provides superior tasting, contaminant-free water. ## Description What is included: - 4 pieces of 5 Micron Sediment Filters #FP15 - 4 pieces of Granular Activated Carbon (GAC) Filters #FG15 - 4 pieces of 5 Micron CTO Carbon Filters #FC15 - 1 piece of 75GPD RO membrane #MC7 - 2 piece of Post Carbon Inline filters #FT15 - 4 piece of Alkaline Mineral filters #FA15 - 2 piece of 11W UV light bulb #UVB11 Fit Models -RCC7AK-UV -RCC1UP-AK Specifications & Dimensions: - Length: 9 3/4", O.D. = 2 7/8" - 1/4" Fitting -Weight: 21 LBS. Review: This is the easiest filter system to operate. I had my cousin install the system. Now it’s time to change the filters out. I watched the videos ispring have posted so I’m a well informed 66 year old woman. I encountered no problems or mess. There wasn’t any leakage. The filter replacement was very easy. Quality of parts excellent. Most importantly my water tastes so good. Much better than bottled. Review: This was a great set to replace the filters on my iSpring Reverse Osmosis Water System. Everything I needed was included and the kit is good for 2 years! Very convenient to ensure my system continues to provide quality tasting water for the family. I also wanted to give a big shoutout to Sean from iSpring. I did not know what system I had so I called the iSpring help desk and Sean answered. He quickly identified the system and found the best deal available for my system. Sean also provided videos with step-by-step instructions that explained how to change the filters. When the package arrived, I noticed that the fittings on the new filters were different from what I had so I reached out to Sean and he sent out a conversion kit right away. After replacing all my filters, I noticed a beeping sound whenever I used the faucet so I reached out to Sean once again and he worked with me to quickly resolve the issue. This was such great customer service! Thank you Sean for all your help!! ## Features - Individually wrapped 2-year high capacity filter replacement cartridge pack for 7-stage RO AK UV systems - Experience clean water every time you turn on the faucet. Enjoy crystal clear ice cubes, fresher tea and coffee – even better than most bottled water. TDS rejection rate up to 97% (under NSF58 testing condition) - Alkaline mineral filter produces ph-balanced alkaline water with restored minerals such as natural calcium, magnesium, and potassium ions - 21 pieces of 10" x 2. 5" replacement water filters included: 4x sediment filters, 4x granular activated carbon filters, 4x carbon block filters, 2x post-carbon filter, 4x alkaline filters, and 2x ultraviolet light bulb - 75GPD Thin Film Composite (TFC) Membrane included, tested by independent third-party to meet NSF/ANSI Standard. Updated FA15 alkaline mineral filters and FT15 post-carbon filters are built with a secure push-fit quick connection, which allows faster filter replacement. If you have trouble installing the filters, please refer to the user manual or contact us ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00BOCDJGK | | ASIN | B00BOCDJGK | | Best Sellers Rank | #214,359 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #453 in Under-Sink Water Filters | | Brand Name | iSpring | | Compatible Refrigerator Models | Whirlpool WRS325SDHW | | Compatible Water Purifier Models | iSpring RCC7AK-UV | | Customer Reviews | 4.8 4.8 out of 5 stars (58) | | Customer reviews | 4.8 4.8 out of 5 stars (58) | | Date First Available | 2 December 2013 | | EU Spare Part Availability Duration | 2 Years | | External Testing Certification | No | | Global Trade Identification Number | 00662425058570 | | Included Components | Water Filter and Fittings | | Is Discontinued By Manufacturer | No | | Item Dimensions D x W x H | 30.5D x 40.6W x 40.6H centimeters | | Item Type Name | Water Filters | | Item model number | F21KU75 | | Manufacturer | iSpring | | Manufacturer | iSpring | | Manufacturer Part Number | F21KU75 | | Material Type | Polypropylene (PP) | | Model Number | F21KU75 | | Number of Items | 1 | | Product Benefits | Improves water taste and quality, provides alkaline water with essential minerals | | Product Dimensions | 6.35 x 6.35 x 25.4 cm; 7.01 kg | | Set Name | 21 Piece Set | | UPC | 662425058570 | | Unit Count | 1 Count | ## Product Details - **Brand:** iSpring - **External testing certification:** No - **Material:** Polypropylene (PP) - **Product benefits:** Improves water taste and quality, provides alkaline water with essential minerals - **Product dimensions:** 30.5D x 40.6W x 40.6H centimeters ## Images ![F21KU75 - Image 1](https://m.media-amazon.com/images/I/81Izt32HWCL.jpg) ![F21KU75 - Image 2](https://m.media-amazon.com/images/I/71s13-IdA-L.jpg) ![F21KU75 - Image 3](https://m.media-amazon.com/images/I/71L1eHpcH9L.jpg) ![F21KU75 - Image 4](https://m.media-amazon.com/images/I/71Vt4c+T9oL.jpg) ![F21KU75 - Image 5](https://m.media-amazon.com/images/I/71WIOj4HZrL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by L***N on 31 January 2026* This is the easiest filter system to operate. I had my cousin install the system. Now it’s time to change the filters out. I watched the videos ispring have posted so I’m a well informed 66 year old woman. I encountered no problems or mess. There wasn’t any leakage. The filter replacement was very easy. Quality of parts excellent. Most importantly my water tastes so good. Much better than bottled. ### ⭐⭐⭐⭐⭐ Review *by K***. on 31 August 2025* This was a great set to replace the filters on my iSpring Reverse Osmosis Water System. Everything I needed was included and the kit is good for 2 years! Very convenient to ensure my system continues to provide quality tasting water for the family. I also wanted to give a big shoutout to Sean from iSpring. I did not know what system I had so I called the iSpring help desk and Sean answered. He quickly identified the system and found the best deal available for my system. Sean also provided videos with step-by-step instructions that explained how to change the filters. When the package arrived, I noticed that the fittings on the new filters were different from what I had so I reached out to Sean and he sent out a conversion kit right away. After replacing all my filters, I noticed a beeping sound whenever I used the faucet so I reached out to Sean once again and he worked with me to quickly resolve the issue. This was such great customer service! Thank you Sean for all your help!! ### ⭐⭐⭐⭐⭐ Review *by C***S on 13 October 2024* Folks, Unfortunately, the water in the part of NC that I live in is substandard. And I have spent countless hours researching and have owned several different water filtration systems over the past decade+. I have learned lots of lessons along the way to include the importance of making sure water filter is NSF certified. I can say without a doubt, my iSpring RO water filter with UV sterilizer is the best by far. Not only for performance, but also for the price to purchase and maintain. In my house, we only drink and cook with water from our RO filter! Great purchase, well worth the investment! ## Frequently Bought Together - iSpring F21KU75 2-Year Reverse Osmosis Water Filter Replacement for 7-Stage 75GPD RO Alkaline UV Systems, Fits RCC7AK-UV - iSpring RCC7AK-UV, NSF Certified, 7-Stage Under Sink Reverse Osmosis Water Filtration System with Alkaline Remineralization and UV Filter, Patented Top-Mounted Faucet Design for Easy Installation - iSpring ICEK Ultra Safe Fridge Water Line Connection and Ice Maker Installation Kit for Reverse Osmosis RO Systems & Water Filters, 1/4", 20 feet --- ## 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/286612489-f21ku75](https://www.desertcart.us/products/286612489-f21ku75) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-04-25*