--- product_id: 290146307 title: "AO Smith Basic Direct Connect Under Sink Replacement Filter For AO-MF System - Carbon Block Filter Reduces Up To 99% Of 9 Harmful Contaminants - AO-MF-R" brand: "a. o. smith" price: "₩169795" currency: KRW in_stock: true reviews_count: 8 category: "A. O. Smith" url: https://www.desertcart.kr/products/290146307-ao-smith-basic-direct-connect-under-sink-replacement-filter-ao store_origin: KR region: South Korea --- # 6 months filter life 99% contaminant reduction Easy DIY replacement AO Smith Basic Direct Connect Under Sink Replacement Filter For AO-MF System - Carbon Block Filter Reduces Up To 99% Of 9 Harmful Contaminants - AO-MF-R **Brand:** a. o. smith **Price:** ₩169795 **Availability:** ✅ In Stock ## Summary > 💧 Stay ahead with crystal-clear water—because your health deserves the best! ## Quick Answers - **What is this?** AO Smith Basic Direct Connect Under Sink Replacement Filter For AO-MF System - Carbon Block Filter Reduces Up To 99% Of 9 Harmful Contaminants - AO-MF-R by a. o. smith - **How much does it cost?** ₩169795 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/290146307-ao-smith-basic-direct-connect-under-sink-replacement-filter-ao) ## Best For - a. o. smith enthusiasts ## Why This Product - Trusted a. o. smith brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Pure Water, No Hassle:** Reduces 99% of 9 harmful contaminants including chlorine and lead, ensuring crisp, clean water every time. - • **Effortless Maintenance:** Designed for quick, tool-free replacement—no plumber needed, saving you time and money. - • **Long-Lasting Performance:** Filters up to 1,389 gallons or 6 months of water, delivering consistent purity without waste. - • **Certified Quality Assurance:** IAPMO tested and NSF/ANSI 42 & 53 certified for trusted filtration performance. - • **Mineral-Friendly Filtration:** Removes harmful toxins while preserving essential minerals for balanced hydration. ## Overview The AO Smith Basic Direct Connect Under Sink Replacement Filter (AO-MF-R) is a certified carbon block filter designed for the AO-MF system. It reduces up to 99% of nine harmful contaminants including chlorine, lead, and atrazine, while preserving essential minerals. With a lifespan of 1,389 gallons or 6 months, it offers long-lasting, cost-efficient filtration with easy, tool-free replacement—no plumber required. ## Description Product description The IAPMO Water Quality Platinum Seal is issued by IAPMO RESEARCH AND TESTING, INC., applies to A. O. Smith water filtration system AO-MF and replacement filter element AO-MF-R, and was originally issued in 2018 and is currently up-to-date as of May 2023 for the following Certified to NSF/ANSI 42 for Chlorine, Taste and Odor, Particulate Class I reduction under File No. WP-11123. Certified to NSF/ANSI 53 (or P473) for Atrazine, Cyst, Lead, Lindane, Turbidity reduction under File No. WP-11124. Certification demonstrates that all materials safety and structural integrity requirements have been met. Products are in compliance with the Uniform Plumbing Code. Review: Good system for getting rid of metalic taste, plastic and other yucko stuff. - I've heard of others complaining about the filter not lasting 6 months but this depends upon usage and other events such as one we had where our water supply was contaminated due to flooding. I feel the filter did its job though as we experienced no change in taste, which is good. FYI - my primary purpose for use is to make my coffee taste better by eliminating the metalic chlorine taste in our water, which this does. Out of caution, we triggered the new delivery of a filter from desertcart since we have a subscription. I'm pleased to see it (claims) to remove microplastics too. The unit itself was installed by a local plumber we trust quite a while ago. Replacing the filter is very easy, just turn off the water and have a bucket nearby in case of some water dripping out. One note of caution is you MUST use this exact filter or what you get will not fit! It will seem close but will be a bit wonky and will leak quite a bit. We tried to grab one that looked the same from Lowes which carries AO-Smith but was different as it turns out. So, be sure you have the correct filter, the AO-MF-ADV. Honestly, it's not easy to find this badging on the shelves at Lowes. They often don't have this in stock. I find this a very nice system to use. If you have young kids, you may want to give them water out of another tap than the one this is installed on since this probably eliminates much/all of the fluoride in the water. Keep those kids' teeth healthy! Though desertcart and other still sell these filters, can anyone tell me if AO Smith still sells these or manufactures these still or are they moving to other systems? I absolutely cannot find these filters on AO Smith's site. Review: Good product. - I have bought several of these. They work as advertised. Arrived packaged well, no issues. ## Features - Replacement Filter For The Basic Main Faucet Under Sink Water Filter System (AO-MF) - Easy replacement and no plumber necessary. Includes one Carbon Block filter. Does NOT fit AO-MF-ADV, AO-FF, or AO-MF-B filter systems. - Purifies Water & Reduces 99% of 9 Harmful Contaminants - Basic filtration while leaving in all essential minerals. Reduces chlorine, lead, atrazine, lindane and turbidity. System will not reduce TDS. - Long Lasting & Cost Efficient - No water is wasted and no harmful contaminants are added to your water during filtration. Filter lasts for 1,389 gallons or 6 months. - Use only certified, genuine AO Smith replacement filters for continued contaminant removal and system performance. - IAPMO Tested & Certified to NSF/ANSI standards 42 and 53. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08VD2QCWN | | Best Sellers Rank | #5,845 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #43 in Replacement Under-Sink Water Filters | | Brand | A. O. Smith | | Brand Name | A. O. Smith | | Customer Reviews | 4.7 out of 5 stars 793 Reviews | | External Testing Certification | IAPMO, ANSI, NSF | | Item Dimensions D x W x H | 3"D x 3"W x 14.63"H | | Item Weight | 2 Pounds | | Manufacturer | AO Smith | | Manufacturer Part Number | AO-MF-R | | Material | Carbon Fiber | | Material Type | Carbon Fiber | | Model Number | AO-MF-R | | Number of Items | 1 | | Product Benefits | Reduces 9 harmful contaminants for basic filtration | | Product Dimensions | 3"D x 3"W x 14.63"H | | UPC | 811640030636 | | Unit Count | 1 Count | ## Product Details - **Material:** Carbon Fiber - **Product Dimensions:** 3"D x 3"W x 14.63"H - **Item Weight:** 2 Pounds - **External Testing Certification:** IAPMO, ANSI, NSF - **Product Benefits:** Reduces 9 harmful contaminants for basic filtration ## Images ![AO Smith Basic Direct Connect Under Sink Replacement Filter For AO-MF System - Carbon Block Filter Reduces Up To 99% Of 9 Harmful Contaminants - AO-MF-R - Image 1](https://m.media-amazon.com/images/I/41BopHKN9qL.jpg) ![AO Smith Basic Direct Connect Under Sink Replacement Filter For AO-MF System - Carbon Block Filter Reduces Up To 99% Of 9 Harmful Contaminants - AO-MF-R - Image 2](https://m.media-amazon.com/images/I/71HdzIXFGjL.jpg) ![AO Smith Basic Direct Connect Under Sink Replacement Filter For AO-MF System - Carbon Block Filter Reduces Up To 99% Of 9 Harmful Contaminants - AO-MF-R - Image 3](https://m.media-amazon.com/images/I/716hggFc5iL.jpg) ![AO Smith Basic Direct Connect Under Sink Replacement Filter For AO-MF System - Carbon Block Filter Reduces Up To 99% Of 9 Harmful Contaminants - AO-MF-R - Image 4](https://m.media-amazon.com/images/I/41jf-avgXES.jpg) ![AO Smith Basic Direct Connect Under Sink Replacement Filter For AO-MF System - Carbon Block Filter Reduces Up To 99% Of 9 Harmful Contaminants - AO-MF-R - Image 5](https://m.media-amazon.com/images/I/61JMcSrVwCL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: How can i get replacement filters for my ao smith advanced under sink water filter system? amazon says that it cannot ship them to california.** A: Last purchased one in Sept 2022, shipped to CA; went to re-purchase today and Amazon indicated that it could not ship to my location (but could ship to other states). **Q: Is this compatible with the aquasana claryum aq-mf-1?** A: I have an Aquasana AQ-MF-1. The AO Smith replacement filter has worked as expected for the last 6 months - no leaks, same performance. For what it's worth, AO Smith acquired Aquasana in 2016. **Q: How do you know when the filter needs to be changed?** A: We put a date on it when we replace it and just auto-replace every six months **Q: Does this work to reduce pfas6 concentration?** A: This filter system is only tested and certified for PFOS and PFOA reduction. (NSF P473) Thank you, AO Smith Customer Care ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good system for getting rid of metalic taste, plastic and other yucko stuff. *by G***L on March 25, 2025* I've heard of others complaining about the filter not lasting 6 months but this depends upon usage and other events such as one we had where our water supply was contaminated due to flooding. I feel the filter did its job though as we experienced no change in taste, which is good. FYI - my primary purpose for use is to make my coffee taste better by eliminating the metalic chlorine taste in our water, which this does. Out of caution, we triggered the new delivery of a filter from Amazon since we have a subscription. I'm pleased to see it (claims) to remove microplastics too. The unit itself was installed by a local plumber we trust quite a while ago. Replacing the filter is very easy, just turn off the water and have a bucket nearby in case of some water dripping out. One note of caution is you MUST use this exact filter or what you get will not fit! It will seem close but will be a bit wonky and will leak quite a bit. We tried to grab one that looked the same from Lowes which carries AO-Smith but was different as it turns out. So, be sure you have the correct filter, the AO-MF-ADV. Honestly, it's not easy to find this badging on the shelves at Lowes. They often don't have this in stock. I find this a very nice system to use. If you have young kids, you may want to give them water out of another tap than the one this is installed on since this probably eliminates much/all of the fluoride in the water. Keep those kids' teeth healthy! Though Amazon and other still sell these filters, can anyone tell me if AO Smith still sells these or manufactures these still or are they moving to other systems? I absolutely cannot find these filters on AO Smith's site. ### ⭐⭐⭐⭐⭐ Good product. *by S***7 on May 16, 2026* I have bought several of these. They work as advertised. Arrived packaged well, no issues. ### ⭐⭐⭐⭐⭐ Fast and Leak-Free *by A***M on April 17, 2026* Easy to install, leak-free. We love our AO Smith water filtration system! --- ## 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.kr/products/290146307-ao-smith-basic-direct-connect-under-sink-replacement-filter-ao](https://www.desertcart.kr/products/290146307-ao-smith-basic-direct-connect-under-sink-replacement-filter-ao) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-06-03*