★★★★★
Great filter
Joe mason—October 27, 2025✓ Verified purchase
Work well, always get this replacement for my in line filtering system Read more
About this item
- Replacement filter for: AO Smith Undersink Water Filter (AO-MF-B) - NSF certified to standard 42 for chlorine taste and odor.
- Use only certified, genuine A. O. Smith replacement filters for continued contaminant removal and system performance.
- Single stage water filtration from your existing faucet - Reduces chlorine taste and odor.
- No water is wasted, and nothing is added to your water during the filtration process.
- Filter lasts 6 months with an annual replacement cost of $40 or less - Includes one filter replacement cartridge.
$16.99
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Delivery — Thursday 9 Apr – 15 Apr · Order within 14h 53m
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Product details
| Material | Carbon Fiber |
|---|---|
| Product Dimensions | 5"D x 5"W x 12.8"H |
| External Testing Certification | NSF |
| Product Benefits | Reduces chlorine taste and odor |
| Brand | AO Smith |
Technical specifications
| material | Carbon Fiber |
|---|---|
| product_dimensions | 5"D x 5"W x 12.8"H |
| external_testing_certification | NSF |
| product_benefits | Reduces chlorine taste and odor |
| brand | AO Smith |
| unit_count | 1.0 Count |
| number_of_items | 1 |
| item_weight | 14.4 ounces |
| manufacturer | AO Smith |
| item_model_number | NSF |
| best_sellers_rank | #31,211 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #232 in Replacement Under-Sink Water Filters |
| date_first_available | April 26, 2019 |
From the brand
Customer reviews
4.7416 ratings
Customers say
Customers find the water filter works well and is easy to install, with one mentioning it's the easiest filter to replace.
★★★★★
Works great!
CH-Cincinnati—April 20, 2025✓ Verified purchase
Installation was easy, after I finally found our filter “wrench” that our original filter installer had left behind. Water tastes fine and it seems that our water flow is smoother now than before. No smell, leakage (as long as you don’t forget to insure the gasket is in place!), or durability issues. Read more
★★★★★
OEM
Doyle—November 22, 2025✓ Verified purchase
exact fit, no issues, works great Read more
★★★★☆
Filter
Lauren—September 8, 2025✓ Verified purchase
Good Value Read more
★★★★★
good
Bruddaman—December 10, 2025✓ Verified purchase
Good direct replacement. Fast shipping Read more
★★★★★
AO Smith AO-MF-B-R Under Sink Water Filter Replacement
Customer—January 3, 2026✓ Verified purchase
thay work well for the money Read more
★★★★★
water filter
Customer—November 29, 2025✓ Verified purchase
works as expected Read more
★★★★★
Water filter
Betty Parker—November 11, 2025✓ Verified purchase
Works well. Used for years. Thanks. Read more
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