--- product_id: 129125870 title: "AO Smith Under Sink Water Filter System - Reduces PFAS, Lead, & Chlorine in Drinking Water - Under Counter Claryum Filtration for Kitchen - 2-Stage - AO-US-200" brand: "a. o. smith" price: "£115.41" currency: GBP in_stock: true reviews_count: 8 category: "A. O. Smith" url: https://www.desertcart.co.uk/products/129125870-ao-smith-under-sink-water-filter-system-reduces-pfas-lead store_origin: GB region: United Kingdom --- # 0.5 GPM flow rate NSF/ANSI certified filtration Reduces 99% of 78 contaminants AO Smith Under Sink Water Filter System - Reduces PFAS, Lead, & Chlorine in Drinking Water - Under Counter Claryum Filtration for Kitchen - 2-Stage - AO-US-200 **Brand:** a. o. smith **Price:** £115.41 **Availability:** ✅ In Stock ## Summary > 🚰 Elevate your tap game—drink smarter, live cleaner! ## Quick Answers - **What is this?** AO Smith Under Sink Water Filter System - Reduces PFAS, Lead, & Chlorine in Drinking Water - Under Counter Claryum Filtration for Kitchen - 2-Stage - AO-US-200 by a. o. smith - **How much does it cost?** £115.41 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/129125870-ao-smith-under-sink-water-filter-system-reduces-pfas-lead) ## 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 - • **Plug & Play Clean Water:** Effortless under-sink installation with included tubing and dedicated faucet—no plumber needed, no downtime. - • **Eco-Friendly & Cost-Savvy:** Zero water waste filtration with filters lasting 6 months or 500 gallons, saving you up to 70% annually on bottled water. - • **Pure Hydration, No Compromise:** Advanced 2-stage Claryum filtration removes lead, PFAS, chlorine & more while preserving essential minerals. - • **Certified Safety You Can Trust:** WQA tested and NSF/ANSI 42, 43, 401 certified for guaranteed contaminant reduction and system integrity. - • **Always Ready, Always Refreshing:** Delivers filtered water at a steady 0.5 gallons per minute—perfect for busy professionals and families up to 4. ## Overview The AO Smith Under Sink Water Filter System offers a premium 2-stage Claryum filtration that reduces 99% of 78 harmful contaminants including PFAS, lead, and chlorine. Certified to NSF/ANSI standards 42, 43, and 401, it ensures safe, mineral-rich water delivered at 0.5 gallons per minute through a dedicated faucet. Easy to install without a plumber, this eco-friendly system wastes no water and features filters lasting up to 6 months or 500 gallons, making it a cost-effective upgrade for health-conscious households. ## Description Product description Product Features AO-US-200 AO-MF AO-MF-ADV AOS-HERO-CHR AO-WH-FILTER AO-WH-DSCLR Why is the filter leaking from the filter housing? This is most commonly caused by misalignment, ensure your filter is aligned and completely locked into place. Do so by turning the filter housing completely to the left. Why is the filter leaking from the filter housing? This is most commonly caused by misalignment, ensure your filter is aligned and completely locked into place. Do so by turning the filter housing completely to the left. What O-rings does this filter system use? Due to certification, this system requires original O-rings from the manufacturer. What O-rings does this filter system use? Due to certification, this system requires original O-rings from the manufacturer. How often do I need to replace the filters for this system? Both filters in this system must be replace every 6 months or every 500 gallons. How often do I need to replace the filters for this system? Both filters in this system must be replace every 6 months or every 500 gallons. What do I need to install the unit? For installation, we recommend a drill with 7/32" bit, adjustable wrench, measuring tape, bucket, Phillips head screwdriver, and hammer. All parts needed for installation are included with the system. What do I need to install the unit? For installation, we recommend a drill with 7/32" bit, adjustable wrench, measuring tape, bucket, Phillips head screwdriver, and hammer. All parts needed for installation are included with the system. Review: Should have done this years ago! - Ordered this after our 3rd Brita canister cracked. Install was easy enough that a bacon salesman (me) could be the install tech. Small, compact, and very solidly built system that now gives us great filtered water without the hassle of cracked canisters and refilling every day or so. Turn the tap and drink the water. The filters are easy to access and replace. Love it! Review: I wish I hadn’t waited so long to make the change from spring water delivery to this filter. - After more than twenty years of having 5 gallon bottles of spring water delivered, the water started to have a strange taste/odor, so I canceled my delivery service and started looking for alternatives and the New York Times Wirecutter review recommended this one for removal of chlorine, plastics, and metals at a low price. Installation was straightforward (although I wish the lettered parts were included in the numbered diagram) and immediately after the recommended 10 minute flush out period my tap water, which is not horrible but has a chlorine taste, tasted great. I plan to fill a 3 gallon glass water cooler bottle with this filtered water to use with my existing cooler so I always have cold and hot water available as usual. My yearly cost for drinking water will be reduced by about 70% once I factor in the cost of replacing the filters every six months. Highly recommend! ## Features - Clean Water Straight From A Dedicated Faucet - Connects with included tee to your 3/8 inch threaded cold water supply line to an additional faucet included with the system. Only takes a few minutes. Includes tubing needed for installation - no plumber required. - Purifies Water & Reduces 99% of 78 Harmful Contaminants - Advanced filtration while leaving in all essential minerals. Reduces lead, PFAS (specifically PFOA and PFOS), chlorine, mercury, asbestos, pharmaceuticals, chloramine & more. System will not reduce TDS. - Full System Certified To NSF/ANSI Standards 42, 43 and 401 - Product is WQA tested & certified to NSF performance standards, ensuring the structural integrity & quality of your entire system, not just the filtration media. - Long Lasting & Cost Effecient - No water is wasted and no harmful contaminants are added to your water during filtration. Filter lasts for 6 months/500 Gallons. $120 or less in annual maintenance cost. - Access To Filtered Water Whenever You Need It - System filters water at 0.5 gallons per minute. Perfect for families of 1 to 4. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07NJ4P99G | | Best Sellers Rank | #4,171 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #84 in Under-Sink & Countertop Filtration | | Brand | A. O. Smith | | Brand Name | A. O. Smith | | Customer Reviews | 4.2 out of 5 stars 273 Reviews | | External Testing Certification | NSF/ANSI Standards 42, 43 and 401 | | Included Components | Filter, Faucet, Filter Cartridge Set, Wrench | | Item Weight | 0.01 Ounces | | Manufacturer | AO Smith | | Manufacturer Part Number | AO-US-200 | | Material | Carbon Block | | Material Type | Carbon Block | | Model Number | AO-US-200 | | Number of Items | 1 | | Product Benefits | Certified to reduce 78 contaminants including chlorine, lead, PFAS, microplastics, pesticides, and more Product Benefits Certified to reduce 78 contaminants including chlorine, lead, PFAS, microplastics, pesticides, and more See more | | UPC | 811640030063 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** A. O. Smith - **External Testing Certification:** NSF/ANSI Standards 42, 43 and 401 - **Item Weight:** 0.01 Ounces - **Material:** Carbon Block ## Images ![AO Smith Under Sink Water Filter System - Reduces PFAS, Lead, & Chlorine in Drinking Water - Under Counter Claryum Filtration for Kitchen - 2-Stage - AO-US-200 - Image 1](https://m.media-amazon.com/images/I/71OVCRfcXhL.jpg) ![AO Smith Under Sink Water Filter System - Reduces PFAS, Lead, & Chlorine in Drinking Water - Under Counter Claryum Filtration for Kitchen - 2-Stage - AO-US-200 - Image 2](https://m.media-amazon.com/images/I/71DFHprj5nL.jpg) ![AO Smith Under Sink Water Filter System - Reduces PFAS, Lead, & Chlorine in Drinking Water - Under Counter Claryum Filtration for Kitchen - 2-Stage - AO-US-200 - Image 3](https://m.media-amazon.com/images/I/81y4Lwt4G8L.jpg) ![AO Smith Under Sink Water Filter System - Reduces PFAS, Lead, & Chlorine in Drinking Water - Under Counter Claryum Filtration for Kitchen - 2-Stage - AO-US-200 - Image 4](https://m.media-amazon.com/images/I/81sSawfJzfL.jpg) ![AO Smith Under Sink Water Filter System - Reduces PFAS, Lead, & Chlorine in Drinking Water - Under Counter Claryum Filtration for Kitchen - 2-Stage - AO-US-200 - Image 5](https://m.media-amazon.com/images/I/515ro8zibTL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Why is the filter leaking from the filter housing?** A: This is most commonly caused by misalignment, ensure your filter is aligned and completely locked into place. Do so by turning the filter housing completely to the left. **Q: What O-rings does this filter system use?** A: Due to certification, this system requires original O-rings from the manufacturer. **Q: How often do I need to replace the filters for this system?** A: Both filters in this system must be replace every 6 months or every 500 gallons. **Q: What do I need to install the unit?** A: For installation, we recommend a drill with 7/32" bit, adjustable wrench, measuring tape, bucket, Phillips head screwdriver, and hammer. All parts needed for installation are included with the system. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Should have done this years ago! *by L***T on April 20, 2026* Ordered this after our 3rd Brita canister cracked. Install was easy enough that a bacon salesman (me) could be the install tech. Small, compact, and very solidly built system that now gives us great filtered water without the hassle of cracked canisters and refilling every day or so. Turn the tap and drink the water. The filters are easy to access and replace. Love it! ### ⭐⭐⭐⭐⭐ I wish I hadn’t waited so long to make the change from spring water delivery to this filter. *by W***E on February 1, 2026* After more than twenty years of having 5 gallon bottles of spring water delivered, the water started to have a strange taste/odor, so I canceled my delivery service and started looking for alternatives and the New York Times Wirecutter review recommended this one for removal of chlorine, plastics, and metals at a low price. Installation was straightforward (although I wish the lettered parts were included in the numbered diagram) and immediately after the recommended 10 minute flush out period my tap water, which is not horrible but has a chlorine taste, tasted great. I plan to fill a 3 gallon glass water cooler bottle with this filtered water to use with my existing cooler so I always have cold and hot water available as usual. My yearly cost for drinking water will be reduced by about 70% once I factor in the cost of replacing the filters every six months. Highly recommend! ### ⭐⭐⭐⭐⭐ ' *by J***M on November 9, 2025* Product works just as expected. Flow rate is good. Installation was fairly simple other than reaching behind the sink to install the filter faucet. I experienced no leaks but I did use plumbers tape on all the connections. HIGHLY RECOMMEND! Makes my water taste so much better but I have to say its not Poland Spring. ## Frequently Bought Together - AO Smith Under Sink Water Filter System - Reduces PFAS, Lead, & Chlorine in Drinking Water - Under Counter Claryum Filtration for Kitchen - 2-Stage - AO-US-200 - AquaBliss High Output Revitalizing Shower Filter - Reduces Dry Itchy Skin, Dandruff, Eczema, and Dramatically Improves The Condition of Your Skin, Hair and Nails - Chrome (SF100) --- ## 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.co.uk/products/129125870-ao-smith-under-sink-water-filter-system-reduces-pfas-lead](https://www.desertcart.co.uk/products/129125870-ao-smith-under-sink-water-filter-system-reduces-pfas-lead) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-06*