1 / 7Waterdrop 15UA WD-15UA Under-Sink Water Filter
The Waterdrop 15UA WD-15UA is a non-electric under-sink filter that connects to the existing cold-water line and faucet. It is presented as a chlorine, taste and odour reduction option, but the listing says it does not reduce TDS. Its stated lifespan and capacity vary across the listing, so check those details before buying.
At a glance
- Connects under the sink to the original faucet, with the listing specifying a cold-water supply.
- Manufacturer claims reduction of chlorine, taste and odour, and cites testing against NSF/ANSI 42.
- The listing explicitly says this filter does not reduce TDS, despite a separate product detail saying “Reduce TDS”.
- The stated 0.75-gallon-per-minute maximum flow rate is lower than the separate 3-litres-per-minute claim.
Reference price: €79.99
Price checked: 13 Nov 2026
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Pros and cons
Pros
- Non-electric design avoids the need for a power supply.
- Direct connection to the existing faucet avoids requiring a dedicated filter faucet, according to the listing.
- The described filter replacement uses a twist-and-lock design.
Technical specifications
15 specifications| Brand | Waterdrop |
|---|---|
| Model | WD-15UA |
| Installation type | Under Sink |
|---|---|
| Purification method | Activated Carbon |
| Container type | Faucet |
| Power configuration | Non electric |
| Maximum flow rate | 0.75 Gallons Per Minute |
| Upper temperature rating | 38 Degrees Celsius |
| Filter life cycle | 2 Years |
| Product shelf life | 24 Months |
| Capacity | 24420 Gallons |
| Special feature | Reduce TDS |
| Dimensions (L × W × H) | 9.1L x 9.1W x 42.4H centimetres |
|---|---|
| Weight listed | 1.63 Kilograms |
| Material listed | NSF/ANSI Approved Material Components |
|---|
What to know before buying
Listing details to confirm
The listing is contradictory on TDS reduction, stating “Reduce TDS” in product details but explicitly saying the filter cannot lower TDS. Its capacity is listed as 19,000 gallons in the title, 24,420 gallons in product details and 60,000 litres in a feature, while another item label says 16,000 gallons. Flow is listed as both 0.75 gallons per minute and 3 litres per minute at 60 psi. Confirm the selected model’s capacity, flow and TDS performance before buying. The manufacturer specifies cold-water-only installation, and customer feedback reports mixed experiences with adapter fit and flow.
What’s in the box
Included- Waterdrop under-sink filtration system ×1
- Inlet hose ×1
- Outlet hose ×1
- 3/8-inch–1/2-inch converter set ×1
- Self-tapping screws ×2
- Teflon tape ×1
- Drilling sticker ×1
Who is it for?
A good fit for
- Households seeking an under-sink, non-electric filter for taste and chlorine reduction while retaining dissolved minerals.
- Buyers who want a direct connection to an existing faucet and are comfortable checking connector compatibility.
Less suited to
- Anyone seeking TDS reduction or a reverse-osmosis system.
- Buyers who need an unambiguous capacity or flow specification before purchase.
Customer reviews on Amazon
- 5 stars
79% 79% - 4 stars
12% 12% - 3 stars
4% 4% - 2 stars
1% 1% - 1 star
4% 4%
Customer feedback highlights perceived effectiveness, easier installation, clearer instructions and improved water taste, with some buyers also considering the system worth its price. Experiences with fit and water flow are mixed, including reports of adapter-fit difficulties and slower-than-expected flow. For buyers connecting to an existing cold-water line, these fit and flow concerns matter alongside the listing’s different maximum-flow figures. Aggregate ratings lean positive, but they do not establish why customers rated the product as they did.
Positive themes
- Customers report easier installation and improved water taste.
- Some customers describe the filter as effective and worthwhile for the price.
Mixed feedback
- Feedback on adapter fit is mixed, with some customers reporting that it does not fit properly.
- Some customers say water flow is slower than expected.
Frequently asked questions
Does the Waterdrop 15UA reduce TDS?
The listing gives conflicting information. One product detail says “Reduce TDS”, but the description explicitly says this filter cannot lower TDS. Do not rely on it for TDS reduction.
What is the stated filter capacity?
The listing gives several different figures: 19,000 gallons in the title, 24,420 gallons in product details, 60,000 litres in a feature and 16,000 gallons in an item label. Confirm the applicable capacity for the selected product.
Can it connect to different cold-water line sizes?
The manufacturer says the included 3/8-inch hose and 3/8-inch–1/2-inch converter support those line sizes. Customer feedback is mixed about adapter fit, so check your connection dimensions.
Does installation require electricity?
No. The listed power configuration is non-electric. The manufacturer says to connect the system only to a cold-water supply.
Alternative options
Waterdrop 10UA-UF 0.01μm Ultra Filtration Under Sink Water Filter System | Reduce PFAS, PFOA/PFOS, Baçtёria Reduction, Chlorine Reduction, 11000 Gallons, Direct Faucet Connection
€72.24
Waterdrop 10UA Under Sink Water Filter System, 11000 Gallons Capacity | Reduce PFOA/PFOS, Reduce Lead, Chlorine, Bad Taste, Odor, NSF/ANSI 42 Certified, Direct Connection to your Faucet
€59.49
Waterdrop TSB Under Sink Water Filter System, 8-Layer Filtration | Reduce PFAS, PFOA/PFOS, Reduce Lead, Chlorine, Bad Taste, NSF/ANSI 42 Certified, No TDS Reduction, with Dedicated Faucet
€118.99
Waterdrop RF10 Filter, Replacement for 10UA/10UB Under Sink Water System | 30,000 Liters High Capacity, Reduces PFAS, PFOA/PFOS, Lead, Chlorine, Bad Taste & Odor, NSF/ANSI 42 Certified, 1 Year, 1 Pack
€32.99
