★★★★★
Great filters
robin griffith—October 31, 2025✓ Verified purchase
Great product Read more
Waterdrop
Waterdrop 3US-AF01 Under Sink Water Filter Replacement for Standard Filtrete 3US-AF01 3US-AS01 Aqua-Pure AP Easy C-CS-FF WHCF-SRC WHCF-SUFC
$31.97
About this item
- NSF/ANSI Certified Filter:Tested against NSF/ANSI 42 standards, it effectively reduces Chlorine. Activated carbon block and other advanced filter media ensure efficient and safe filtration.
- Authority Guaranteed Material:Specially selected premium materials are lead-free, which is fully certified by the IAPMO against NSF/ANSI 372 standard. The BPA-free, lead-free material ensures more reliable use from the inside out.
- Stable Flow Rate: The tested full flow rate for waterdrop water filter is 0.75 gpm. Provides you with stable filtered water without obvious pressure drops.This filter does not reduce TDS! Connected with the cold water valve only!
- New upgrade & Keep Water Fresh:After advanced upgrade, the model number is changed from WD-3US-AF01 into WD-W01. To keep your water fresh, replace your filter every 6 months or 6,000 gallons, whichever comes first will vary based on water condition.
- Replacement Model:3M Filtrete 3US-AF01, 3US-AS01 system, 3M AP3-765S, 3M AP3-C765, AP Easy C-CS-FF, WHCF-SRC, WHCF-SUFC, WHCF-SUF Filter Cartridge; Fits 3US-AS01 Advanced Under-Sink Filtration Systems, AP Easy CS-FF Under-Sink Filtration Systems.
$31.97
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Product details
| Material | Activated Carbon |
|---|---|
| Product Dimensions | 8.6"D x 17.2"W x 27.7"H |
| Item Weight | 2.6 Pounds |
| External Testing Certification | IAPMO |
| Product Benefits | Reduces chlorine, taste, odor, and other harmful elements |
Technical specifications
| material | Activated Carbon |
|---|---|
| product_dimensions | 8.6"D x 17.2"W x 27.7"H |
| item_weight | 2.6 pounds |
| external_testing_certification | IAPMO |
| product_benefits | Reduces chlorine, taste, odor, and other harmful elements |
| brand | Waterdrop |
| eu_spare_part_availability_duration | 6 Months |
| set_name | 2 |
| upc | 840814194362 840814142172 |
| unit_count | 2.0 Count |
| compatible_water_purifier_models | 3M 3US-AS01 |
| number_of_items | 2 |
| manufacturer | Waterdrop |
| item_model_number | WD-3US-AF01 |
| best_sellers_rank | #118,202 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #810 in Replacement Under-Sink Water Filters |
| is_discontinued_by_manufacturer | No |
| date_first_available | September 10, 2017 |
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Customer reviews
4.7643 ratings
Customers say
Customers find the water filter to be a great replacement that works well and makes water taste great.
★★★★★
Perfect fit. Clean water.
Clarence R Jackson—January 20, 2026✓ Verified purchase
I replaced the old under the sink water filter yesterday. Perfect fit. Let the cold side run a few minutes. Now we're drinking clean water. Great value. Read more
★★★★★
Easy to install
Brenda Double—January 30, 2026✓ Verified purchase
Worked well Read more
★★★★☆
Good filter not available locally
Larry—October 30, 2019✓ Verified purchase
It has been difficult to find these filters locally for a few years. When our kitchen was remodeled 12 years ago the Westinghouse undersink systems were sold at Lowes. I've tried other filters before but I can't recommend the most advertised company since they couldn't deliver after 2 purchases. Took a long time to get their email ads stopped. Glad we didn't call a plumber to remove or replace a working system. Old filter had gone 12 months + and flow had slightly reduced on our hard water. These new filters work well and price is reasonable. Read more
★★★★★
Nice clean water with no oder.
JerryB—February 9, 2026✓ Verified purchase
No problems with product, very easy to insert. I usually run the faucet for a couple of seconds to clean out any stagnate water before drinking or use in cooking. Good water flow. Read more
★★★★★
Works great
Janet Costa—March 23, 2025✓ Verified purchase
Easy to install and less expensive then other brands Read more
★★★★★
Easy install, clean taste, low price
Docric—March 16, 2019✓ Verified purchase
I needed to replace my KWC Purestream Plus 633.398 filter that is no longer made. It is small only about 9 inches length. After trying a 3 M and a Filtrete, I saw the dimensions of these were too big. I came upon this which is only about 10 inches long that fits under the counter into my existing pipes and KWC mount. Amazingly, the Waterdrop head screwed into the KWC mount in one quick turn securely locked. Then the water. After running it for a while, I tastes quite pure. As good as the KWC filter. The flow is about the same as the old filter. So I am very pleased with this, having saved the cost of a plumber to re fit the installation. The head seems to be a standard fit across several different manufacturers. Read more
★★★★★
Not too bad of a price
Mo—March 5, 2023✓ Verified purchase
This is the second time that I have purchased this brand of water filter. They are a little smaller than the original filter, but seem to do a good job of filtering the water. They fit the filter device nicely, no problems changing the filter. I believe I will be purchasing them more often. Read more
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