--- product_id: 260028257 title: "AO Smith 2.5\"x10\" 5 Micron Carbon Block Sediment Water Filter Replacement Cartridge - 2 Pack - For Whole House Filtration Systems - AO-WH-PRE-RC2" brand: "a. o. smith" price: "¥11337" currency: JPY in_stock: true reviews_count: 5 category: "A. O. Smith" url: https://www.desertcart.jp/products/260028257-ao-smith-2-5x10-5-micron-carbon-block-sediment-water store_origin: JP region: Japan --- # 5 micron sediment filtration 6-month easy DIY replacement 4 GPM high flow rate AO Smith 2.5"x10" 5 Micron Carbon Block Sediment Water Filter Replacement Cartridge - 2 Pack - For Whole House Filtration Systems - AO-WH-PRE-RC2 **Brand:** a. o. smith **Price:** ¥11337 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your home’s water game with premium clarity and flow—because your tap deserves the best. ## Quick Answers - **What is this?** AO Smith 2.5"x10" 5 Micron Carbon Block Sediment Water Filter Replacement Cartridge - 2 Pack - For Whole House Filtration Systems - AO-WH-PRE-RC2 by a. o. smith - **How much does it cost?** ¥11337 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/260028257-ao-smith-2-5x10-5-micron-carbon-block-sediment-water) ## 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 - • **Value-Packed Duo:** Two-pack replacement set keeps your whole house filtration system running smoothly without frequent reorders. - • **Trusted Certification:** NSF 42 certified filter media ensures reliable reduction of aesthetic impurities for peace of mind. - • **Effortless Maintenance:** Replace your filters every 6 months with zero plumber hassle—DIY simplicity meets premium performance. - • **Crystal Clear Every Tap:** 5 micron carbon block filters out sediment invisible to the naked eye for pristine water quality. - • **Flow Without Compromise:** Delivers an impressive 4 gallons per minute, perfect for small households craving uninterrupted water flow. ## Overview The AO Smith 2.5"x10" 5 Micron Carbon Block Sediment Water Filter Replacement Cartridge (2-pack) is designed for whole house filtration systems, delivering high flow rates up to 4 GPM while filtering sediment down to 5 microns. Certified to NSF 42 standards, it reduces aesthetic impurities and extends appliance life. Easy to replace every 6 months without professional help, this carbon block filter is ideal for households of 1-4 people seeking reliable, clean water from every tap. ## Description Filter for use with: Whole House Sediment Filter (AO-WH-PREV or AO-WH-PRE). Use only certified, genuine A. O. Smith filters for continued contaminant removal and system performance. Longer lasting appliances - whole house filter system designed to reduce sediment from every tap. 5 micron filtration - reduces sediment smaller than the human eye can see. Replacements made easy - no plumber necessary. Replace filter every 6 months. Standard capacity (2.5") filter is perfect for household sizes of 1-4 people. Includes 2-pack of replacement sediment filters. Review: An excellent choice - I really did my homework on these filters. I have a 2 stage whole house filter system so I have to think carefully about what I use. For my first stage I have a sediment filter with added polyphosphate to deal with scaling (quality filter made by 3M). This A.O. Smith is my second filter. The things I have to worry most about in my water are chlorine and chlorine byproducts as well as atrazine. Note the following review is entirely in the context of needing a whole house filter with a very high flow rate. Carbon block filters can be NSF rated at 42 or 53. For the 42 standard, manufacturers can talk about reducing the problematic taste or appearance of contaminants. For the 53 standard, manufacturers can talk about the health effect of removed contaminants. The bad news for people with 10 x 2.5 housings is that, I don’t think, there is a single carbon filter on the market in this size, with a decent flow rate, that claims the NSF 53 standard compliance. I believe this is because the filter is simply too small to meet the standard. So we’re stuck with the NSF 42 standard. There is more bad news here. I don’t think there is a single filter in this size, with this flow rate, that is fully certified by NSF to meet the 42 standard. There appear to be three levels that NSF certifies. One is the materials used in the filter are to spec, the next is that the filter housing is to spec, and finally there is certification that the filter produces water that meets the standard. What you get with the A.O. filter here is certification from the NSF that the filter media meets spec. That appears to me to be as good as it gets after spending 1/2 of an entire Sunday researching this. On the upside this is, as far as I can tell, one of, if not the, highest flow rate filters in this size with an NSF certification. At 4 gpm it’s WAY higher than most filters in this class. The amount of water this filter will treat is not stated explicitly anywhere, but since they’re saying it might last 6 months they seem to be estimating it will last over 10,000 gallons which is amazing for this type of filter (I sincerely doubt it will last 10,000 gallons). However it does appear to be a true carbon block filter which could account for its longevity. So back to water quality. It’s easy enough to know if a filter like this is removing chlorine because of the taste and smell. However, at least for me, it’s much harder to know if it’s removing trihalomethane or atrazine. There is reason to believe it IS removing those contaminants because the mechanism of action is similar to how chlorine taste and smell are removed. However I can't be sure without doing expensive lab tests, that's what the NSF 53 standard is for. And again, I don't think there is a single filter in this form factor certified to the NSF 53 standard. You may spot something like the Matrikx and think "oh he's wrong" but that filter has a flow rate of .75 gpm, it's just not practical for whole house applications. Overall this filter is a very good choice. For the price and the size it may be the best filter choice if you need a high flow rate for whole house applications. 4 gpm will be able to work for 1 or two people but will struggle beyond that. On the negative side there is no mention of whether the carbon block is coconut shell so it probably isn't (coconut shell is preferred). Also, on first use I had about 5 gallons of water that came out pretty dark with carbon fines. This isn't necessarily bad but something to keep in mind if you use this as a pre-filter because those fines will not be good for the filter that come after this one. You'll want to flush from a faucet that doesn't not have a screen because I got two fairly large chunks of carbon in addition to fines in that first 5 gallons. Review: Great Filter - Been using this product for 14 years. Works very well! ## Features - Filter for use with: Whole House Sediment Filter (AO-WH-PREV or AO-WH-PRE). Use only certified, genuine A. O. Smith filters for continued contaminant removal and system performance. - Longer lasting appliances - whole house filter system designed to reduce sediment from every tap. - 5 micron filtration - reduces sediment smaller than the human eye can see. - Replacements made easy - no plumber necessary. Replace filter every 6 months. Standard capacity (2.5") filter is perfect for household sizes of 1-4 people. - Includes 2-pack of replacement sediment filters. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07R2F8VX3 | | Best Sellers Rank | #245,103 in Kitchen ( See Top 100 in Kitchen ) #772 in Water Filter Cartridges | | Brand | A. O. Smith | | Brand Name | A. O. Smith | | Compatible Water Purifier Models | A.O. Smith AO-WH-PRE | | Customer Reviews | 4.7 out of 5 stars 987 Reviews | | External Testing Certification | NSF 42 - Reduces aesthetic impurities | | External testing certification | NSF 42 - Reduces aesthetic impurities | | Item Dimensions D x W x H | 6.4D x 12.7W x 25.4H centimeters | | Item Weight | 0.5 Pounds | | Item weight | 0.5 Pounds | | Manufacturer | AO Smith | | Manufacturer Part Number | REACH 2 6 | | Material | Carbon | | Material Type | Carbon | | Model Number | AO-WH-PRE-RC2 | | Number of Items | 2 | | Product Benefits | Removes Dust | | Product benefits | Removes Dust | | Product dimensions | 6.4D x 12.7W x 25.4H centimeters | | Set Name | Standard Capacity Sediment Filter Replacement Set (2 Pack) | | Unit Count | 2 Count | ## Product Details - **External testing certification:** NSF - **Item weight:** 1 Pounds - **Material:** Carbon - **Product benefits:** Removes Dust - **Product dimensions:** 6.4D x 12.7W x 25.4H centimeters ## Images ![AO Smith 2.5"x10" 5 Micron Carbon Block Sediment Water Filter Replacement Cartridge - 2 Pack - For Whole House Filtration Systems - AO-WH-PRE-RC2 - Image 1](https://m.media-amazon.com/images/I/81CNdhnCkBL.jpg) ![AO Smith 2.5"x10" 5 Micron Carbon Block Sediment Water Filter Replacement Cartridge - 2 Pack - For Whole House Filtration Systems - AO-WH-PRE-RC2 - Image 2](https://m.media-amazon.com/images/I/51GcHgAe9VL.jpg) ![AO Smith 2.5"x10" 5 Micron Carbon Block Sediment Water Filter Replacement Cartridge - 2 Pack - For Whole House Filtration Systems - AO-WH-PRE-RC2 - Image 3](https://m.media-amazon.com/images/I/71+fpNTKndL.jpg) ![AO Smith 2.5"x10" 5 Micron Carbon Block Sediment Water Filter Replacement Cartridge - 2 Pack - For Whole House Filtration Systems - AO-WH-PRE-RC2 - Image 4](https://m.media-amazon.com/images/I/8104optHRiL.jpg) ![AO Smith 2.5"x10" 5 Micron Carbon Block Sediment Water Filter Replacement Cartridge - 2 Pack - For Whole House Filtration Systems - AO-WH-PRE-RC2 - Image 5](https://m.media-amazon.com/images/I/61umYHeLq9L.jpg) ## Questions & Answers **Q: Are these effective at reducing contaminants like Lead and/or Arsenic?** A: No. I use a RO (reverse osmosis) system for removing arsenic. **Q: How does this differ from AO-WH-PRE-RCP2? Is it just filter life, or does one filter better than the other?** A: This is what our installer recommended. We have not used any other filter as these work very well. We change them about every 5 months. **Q: how frequntly should they be changed?** A: The package indicates the filter lasts up to six months. I usually change it within the fifth month. **Q: Do these fit in the 4200WW14 housing ?** A: Yes ## Customer Reviews ### ⭐⭐⭐⭐⭐ An excellent choice *by E***S on 8 September 2022* I really did my homework on these filters. I have a 2 stage whole house filter system so I have to think carefully about what I use. For my first stage I have a sediment filter with added polyphosphate to deal with scaling (quality filter made by 3M). This A.O. Smith is my second filter. The things I have to worry most about in my water are chlorine and chlorine byproducts as well as atrazine. Note the following review is entirely in the context of needing a whole house filter with a very high flow rate. Carbon block filters can be NSF rated at 42 or 53. For the 42 standard, manufacturers can talk about reducing the problematic taste or appearance of contaminants. For the 53 standard, manufacturers can talk about the health effect of removed contaminants. The bad news for people with 10 x 2.5 housings is that, I don’t think, there is a single carbon filter on the market in this size, with a decent flow rate, that claims the NSF 53 standard compliance. I believe this is because the filter is simply too small to meet the standard. So we’re stuck with the NSF 42 standard. There is more bad news here. I don’t think there is a single filter in this size, with this flow rate, that is fully certified by NSF to meet the 42 standard. There appear to be three levels that NSF certifies. One is the materials used in the filter are to spec, the next is that the filter housing is to spec, and finally there is certification that the filter produces water that meets the standard. What you get with the A.O. filter here is certification from the NSF that the filter media meets spec. That appears to me to be as good as it gets after spending 1/2 of an entire Sunday researching this. On the upside this is, as far as I can tell, one of, if not the, highest flow rate filters in this size with an NSF certification. At 4 gpm it’s WAY higher than most filters in this class. The amount of water this filter will treat is not stated explicitly anywhere, but since they’re saying it might last 6 months they seem to be estimating it will last over 10,000 gallons which is amazing for this type of filter (I sincerely doubt it will last 10,000 gallons). However it does appear to be a true carbon block filter which could account for its longevity. So back to water quality. It’s easy enough to know if a filter like this is removing chlorine because of the taste and smell. However, at least for me, it’s much harder to know if it’s removing trihalomethane or atrazine. There is reason to believe it IS removing those contaminants because the mechanism of action is similar to how chlorine taste and smell are removed. However I can't be sure without doing expensive lab tests, that's what the NSF 53 standard is for. And again, I don't think there is a single filter in this form factor certified to the NSF 53 standard. You may spot something like the Matrikx and think "oh he's wrong" but that filter has a flow rate of .75 gpm, it's just not practical for whole house applications. Overall this filter is a very good choice. For the price and the size it may be the best filter choice if you need a high flow rate for whole house applications. 4 gpm will be able to work for 1 or two people but will struggle beyond that. On the negative side there is no mention of whether the carbon block is coconut shell so it probably isn't (coconut shell is preferred). Also, on first use I had about 5 gallons of water that came out pretty dark with carbon fines. This isn't necessarily bad but something to keep in mind if you use this as a pre-filter because those fines will not be good for the filter that come after this one. You'll want to flush from a faucet that doesn't not have a screen because I got two fairly large chunks of carbon in addition to fines in that first 5 gallons. ### ⭐⭐⭐⭐⭐ Great Filter *by G***G on 13 May 2026* Been using this product for 14 years. Works very well! ### ⭐⭐⭐⭐⭐ Good RV Filter *by G***E on 7 June 2025* I have used several different filter manufacturers over the years. I use the AO Smith filters in my RV whole house filter canister. With the 5micron rating I am confident the filter removes all sediment that may be harmful to my faucets without reducing the regulated (45psi) water pressure or flow. IMHO, also helps the campground water supply have a more consistent taste as we move around the country, we have not had any faucet stoppages due to sediment. I have made this filter my go to filter. Always have a spare. This filter is a good value. ## Frequently Bought Together - AO Smith 2.5"x10" 5 Micron Carbon Block Sediment Water Filter Replacement Cartridge - 2 Pack - For Whole House Filtration Systems - AO-WH-PRE-RC2 - AO Smith 2.5"x10" 5 Micron Sediment Water Filter Replacement Cartridge - 2 Pack - For Whole House Filtration Systems - AO-WH-PREV-R2 - AO Smith 2.5"x10" 20 Micron Sediment Water Filter Replacement Cartridge - 2 Pack - For Whole House Filtration Systems - AO-WH-PRE-RP2 --- ## 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.jp/products/260028257-ao-smith-2-5x10-5-micron-carbon-block-sediment-water](https://www.desertcart.jp/products/260028257-ao-smith-2-5x10-5-micron-carbon-block-sediment-water) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-01*