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Waterdrop RF15-UF Water Filter Replacement for Waterdrop Under Sink Water Filtration system
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Waterdrop RF15-UF Water Filter Replacement for Waterdrop Under Sink Water Filtration system


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  • The undersink water filter is designed to fit Waterdrop undersink water filtration system
  • Use innovative six-stage filtration. Tested against NSF standards, this undersink water filter reduces chlorine, heavy metals and chemical contaminants such as fluoride.
  • Activated carbon block and other advanced filter media ensure efficient and safe filtration. KDF effectively keep filter sanitary.
  • With a filtration accuracy of 0.01 μm, the ultrafiltration membrane filters out contaminants larger than 0.01 μm.
Established in 2015, Waterdrop has grown to become the most popular and diversified brand in the replacement filter industry. We have a unique global footprint and sell our products in more than 20 countries worldwide. We are dedicated to delivering a sustainable, industry-leading water purification systems by enhancing water quality and contributing to a healthier future.

Please note that this Undersink Water Filter cannot reduce TDS.

If you need to reduce TDS, the Waterdrop RO System will be an excellent choice.

TDS stands for total dissolved solids. It is composed of inorganic salts and a small amount of organic matter. This undersink filter cannot lower the TDS value because it reduces harmful substances while retaining minerals such as potassium, calcium, sodium, and magnesium, which are beneficial for your health.
Waterdrop Undersink Water Filter
Saves money
You’ll pay only 4¢ per day for the undersink filter replacement and your water quality will improve with each passing day. Enjoy pure and healthy drinking water for a long time.
3-second filter replacement
The undersink filter replacement is as user-friendly as it gets. Innovative system design allows you to replace this undersink water filter within only 3 seconds. The push-to-connect fittings make installation and replacement easier than ever, saving you time and effort. No additional tool needed!
Stable and fast water flow
The undersink water filter has a stable water flow and high filtration efficiency. The tested full flow rate is 2.0 gpm at 60 psi. You’ll get filtered water without the wait.
Compatible with WD-UA/UB/UC
The undersink water filter is designed to fit Waterdrop Undersink Water Filtration System (all WD-UA/UB/UC series). Compatible with all three methods of connection, this undersink filter brings you purified water from your original faucet, your dedicated faucet, or your refrigerator. Get easy access to clean, safe, and healthy purified water with Waterdrop!
The five-stage filtration ensures a great user experience.
With a filtration accuracy of 0.5 μm, the Waterdrop Undersink Water Filter reduces lead, chlorine, taste and odor, sediment, fluoride, rust, arsenic, and other heavy metals. You don’t have to worry about the safety of the filtered water.
The undersink filter also retains minerals that are essential to your body, such as potassium, calcium, sodium, and magnesium. Enjoy fresh, healthy water with Waterdrop.
  • Calcium is indispensable to the building of bones and teeth, it also plays a vital role in the physiological and biochemical processes of organisms and cells.
  • Potassium is vital for the functioning of all living cells. It helps maintain a normal heartbeat and the blood’s pH level. It is also an important element in the synthesis of protein.
  • Sodium can stimulate nerves and muscles, regulating osmotic equilibrium and pH and promoting the absorption of nutrients such as glucose and amino acids.
  • Magnesium is one of the most abundant elements in the human body. It stabilizes healthy muscle and nerve function and helps maintain a normal heartbeat.
10X longer service life than other under sink water purifiers
According to the EPA, an American family uses 18-22 gallons of tap water every day. With a filtration capacity of 16,000 gallons, the Waterdrop Undersink Water Filter can meet a tap water consumption of 22 gallons a day, which will satisfy your daily water needs. Meanwhile, other under counter water filters claim that they have a filtration capacity of 1,500 gallons, producing 4 gallons of filtered water a day, which actually cannot satisfy your daily water needs.
Customer Reviews
*Some reviews are from for the same product.
Very easy to change the filter and water taste great

The water from this filter is so clear and does not have any usual smell or weird taste like most expensive refrigerator replacement filter. The ice is crystal clear ( I make ice using the water from this filter) Everyone in my family love the water. Best value!

Install was easy (except drilling a hole in the countertop - you tube was a big help with that). The water flow is excellent and the water is as good as bottled. We're seeing no calcium buildup in coffee pot (which is a big problem for us).
Make sure you have all the right fittings
Easy install and clean water. We use it in our camper
Easy to install/change. Taste is not that good. But, I do feel better.
I drink the cool water from my refrigerator, which is filtered but doesn't remove fluoride. When my plant was turning yellow at the tips, which indicated fluoride, I got concerned that our public water was overdosing. So, I installed this product that came with a 0.5-micron filter and switched that one with this 0.1-micron filter. Installation for both the unit and the replacement filter was very easy. After installed, upon immediate cold water faucet turn on, the water was milky but eventually ran clear. I've had filters run cloudy before at initial change out. So, that did not concern me. I don't care for the taste, but I notice that it is filtering out sediment that I use to supply my portable swamp cooler. That means I am not consuming those particles anymore. So, I ordered another to filter the water that is supplied to my main swamp cooler which gets yucky looking from all the sediment that accumulates and takes a long time to clean as a result. Monitoring that system will provide the visual proof I will need to see what's happening with the faucet that supplies my drinking water. I will update once I know more.
Waterdrop Undersink Water Filtration System