*The following claims have not been tested and certified by NSF: compatibility claims. The above statement is accordance with the NSF General Policy 25. Please note the certification information is only applicable to Waterdrop, not representing other brands on this page.
**The above brands do not source or sponsor the water filter. The manufacturers' names and model numbers have been used for reference purposes only. The manufacturer is HongKong Ecoaqua Co., Limited. Made in P.R.C
Can I use this system with well water?
If your home already has a whole-house filter, then the system can work perfectly with well water.
Can the system reduce TDS?
TDS stands for total dissolved solids and is basically composed of inorganic salts and a small amount of organic matter. The system can reduce harmful substances while keeping beneficial trace elements, though it is not designed for significant TDS removal. Please choose Waterdrop RO system if you’d like to reduce TDS.
Can this system inhibit bacteria?
This system adopts advanced KDF, which effectively inhibits the growth of bacteria. If you are looking specifically for bacteria removal from this system, you will want to check out the UF collection, which is designed to reduce bacteria. With a pore size of 0.01 μm, the system can effectively reduce most contaminants, ensuring clean, safe, and healthy purified water. Please click here to find the one that’s right for you!
With WD-UC, the system can connect to your refrigerator/icemaker and replace your overpriced refrigerator filter. With a filtration accuracy of 0.5 μm, this inline water filter achieves excellent filtration performance, extended filter life, and lower replacement costs.
What is the water pressure?
Waterdrop Undersink Water Filtration System is built to handle a great deal of pressure and is designed to be installed on cold water lines only. In general, the water pressure in homes should be around 60psi. The recommended water pressure is between 10-125 psi.
No more overpriced refrigerator filters
This inline water filter is compatible with most refrigerators. It’s time to replace your overpriced refrigerator filters so that you can enjoy better filtration performance, a longer service life, and a lower maintenance cost.
Easy installation takes only 3 minutes.
Replacing the filter also takes only 3 seconds.
The push-to-connect fittings make installation easier, saving you time and effort.
Connect with your refrigerator/ ice maker
With accessories to connect to the refrigerator or ice maker, you can easily get cool, crisp filtered water and crystal ice.
Waterdrop Undersink Water Filtration System is compatible with most of the refrigerators on the market, such as Samsung, GE, LG, Frigidaire, Whirlpool, Maytag, and Kenmore.
With a filtration accuracy of 0.5μm, this under-sink water purification system reduces most of the contaminants such as chlorine, taste and odor, sediment, rust, and other heavy metals, which is tested by the third-party laboratory. You don’t have to worry about the safety of the filtered water. 
The under counter water filter system also retains minerals that are essential to your body, such as potassium, calcium, sodium, and magnesium. Enjoy fresh, healthy water with Waterdrop.
Less future replacement cost
On average, you’ll spend 10¢ per day for the first year. You’ll pay only 5¢ per day for the filter replacement and your water quality will improve with each passing day.
Note: Cost varies according to product model.
 *The service life mentioned above is subject to chlorine reduction. Actual result varies according to the local water quality.
 *Information is based on EPA Facts About Actived Carbon Treatment by EPA in 199
*Some of the reviews are synchronized from Amazon.com/ WaterdropDirect Store
Great solution for filtering water to the refrigerator line.
I purchased a new refrigerator with a built-in water filter. Sadly, the small filter that comes with the fridge didn't do a good job of removing the unpleasant taste and smell of the tap water. Adding an in-line filter outside the fridge seemed like the best way to go, and of all the available options, the Waterdrop was the best option for price, types of filter material, and for longevity. The customer service from Waterdrop has been wonderful as well. I had a small problem with my initial filter received and they rectified it quickly, making sure I was completely satisfied with my purchase. Would definitely order again and recommend this filter.