Waterdrop Alkaline Water Filter System for Sink WD-ALK16, Mineralizing Water to 9.5 pH, NSF/ANSI 372 Certified, Compatible with Reverse Osmosis Systems, Under Sink Installation
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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Wednesday, Dec 24
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Style: Alkaline Water Filter
Features
- Healthy Water: Experience the health benefits of balanced hydration with our NSF/ANSI 372 certified alkaline water filter. Crafted from lead-free materials, it elevates water pH to 7.5-9.5, fostering acid-base equilibrium and enhancing metabolic function for your well-being.
- Benefit Minerals: Using advanced PCC mineralization technology to infuse alkaline minerals like Ca and Mg. This water filter system not only elevates water quality but also enriches taste for drinking, cooking, and coffee-brewing, doubling the flavor enjoyment.
- Long-lasting Lifespan: Achieve enduring wellness with our alkaline mineralization water filter, guaranteed for 12 months. Savor the taste of healthy, on-tap water without the hassle and cost of frequent replacements or bottled water. Embrace a sustainable choice that combines longevity and affordability.
- Simple Installation: Easily upgrade your RO system with alkaline mineralization filter. Boasting great compatibility and DIY-friendly installation, it ensures steady water flow for daily drinking. The filter should be attached to your cold water (35-100F) pipe, which deliver a seamless infusion of healthful minerals to your purified water.
- Hassle-free Design: Crafted from superior materials, our alkaline water filter system stands as a bulwark against leaks, dramatically reducing maintenance hassles. Savor the convenience of effortless access to alkaline mineral-rich water in the comfort of your home.
Material: Plastic
Product Dimensions: 5.5"D x 5.5"W x 12.9"H
Product Benefits: Increases pH Level
Brand: Waterdrop
Global Trade Identification Number: 02
Material: Plastic
Product Dimensions: 5.5"D x 5.5"W x 12.9"H
Product Benefits: Increases pH Level
Brand: Waterdrop
Global Trade Identification Number: 02
Unit Count: 1.0 Count
Number of Items: 1
Manufacturer: Waterdrop
Part Number: WD ALK16
Item Weight: 2.25 pounds
Item model number: WD ALK16
Size: 13 Inches X 5.5 Inches, 12 months
Style: Alkaline Water Filter
Item Package Quantity: 1
Special Features: NSF certified
Batteries Included?: No
Batteries Required?: No
Date First Available: December 13, 2023
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Dec 24
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: WD-G3-CF 2-Pack
We bought the Waterdrop reverse osmosis system for our kitchen. Aside from the fact that filters are fairly costly, we think the product it produces (drinking water) is worth the expense. Actually, every single time I go to the grocery store, I chuckle to myself watching people loading their carts with packs and packs of bottled water and then loading the packs from the cart to the trunk. We avoid this activity completely to say nothing of the hundreds, if not thousands, of water bottles we avoid recycling on a yearly basis. The next issue is taste. The taste of our drinking water far exceeds most of the bottled water I have tasted. Adding to the factors I have alredy mentioned, we are on well water. Having a well is not the most ideal situation. We filter and soften our water before it even comes into the house. It doesn't taste bad on it's own but I much prefer the R-O water. Additionally, the reverse osmosis undersink system also filters the water that makes the ice. Our under counter Hoshizaki ice maker produces wonderful, delicious, filtered water ice cubes 24/7. There's a lot of technology afoot for a drink of ice water in my house but, given the circumstances of having a well, the water is top quality. It has 0% impurities according to the water test we do regularly. If I did have public water, I would still have the Waterdrop R-O system. The filters are so easy to change. The unit beeps and a red light comes on to tell you which filter needs changing. It is also "On-demand" so you never have an empty storage tank because there is no storage tank! The Waterdrop Reverse Osmosis system is a 100% improvement over the original R-O system we had which was clumsy, took up a lot more space under the sink and was anything but user friendly!
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Reviewed in the United States on May 21, 2025 by amadele
Style: Alkaline Water Filter
Works great! The water tastes super clean and fresh. No leaks at all, and it was easy to install. Feels like good quality and totally worth the price. I also like the simple, clean design. Would buy again!
Reviewed in the United States on April 30, 2025 by Gustavo Requeijo
Style: WD-G3-CF 2-Pack
Easy to install, rotate and done, didn’t blow out a messy water.
Reviewed in the United States on October 20, 2025 by H
Style: Alkaline Water Filter
I have been using Waterdrop for several years now. This new addition of the alkaline filter is a game changer. My water taxi amazing and is now healthy too
Reviewed in the United States on November 23, 2025 by Jason Tremblay
Style: WD-G3-CF 2-Pack
Perfect fit, no leak, easy to install, actually my 5 years old do it now. I like this product as it helped eliminate all the residues of hard water on our appliances, and it is designed in a way to fit perfectly under the sink. Water tastes perfect and the way its tap is designed to fit the sink makes it an integral part of the sink. I will keep buying these filters as this system is doing the function it is designed to, and I’s been more than 2 years using it.
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Reviewed in the United States on January 31, 2025 by Nader Hammoud
Style: Alkaline Water Filter
Update: After running lots of water through it, it now shows 7.5 minimum PH, as advertised. Tested a few times, consistently 7.5. I had run the instructed amount of water through the filter before my initial test to 6.8. It took probably three times that much water before it produced 7.5 PH. Satisfied but wish it would test higher. Initial review: The ad says it will raise PH to between 7.5 and 9.5. Before install my water tested 6.4. After install, it was 6.8. Retested, recalibrated…. still 6.8 max. Tested bottled alkaline water and my tester showed 9.0, exactly as advertised on the bottle, so there’s not a problem with my meter.
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Reviewed in the United States on December 24, 2024 by Stan
Style: Alkaline Water Filter
This unit works great, water is tasty, water flow is very good. There is a slight hum when the unit works but it is not annoying at all . We bought the unit because the under sink area in our new home was too small to accommodate a standard passive flow filter with a storage tank. The installation went great until we plugged it into the outlet under the sink ( sharing the outlet with the disposal)..That is when we found out that that kind of outlet only works when you flip the wall switch ( duh!!). So had to pay an electrician to put in a switch. And now a drywall and painter to fix the wall
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Reviewed in the United States on June 15, 2024 by Marie Sohner
Style: WD-G3-CF 2-Pack
The filter is very easy to replace. There are no problems changing it.
Reviewed in the United States on October 5, 2025 by Rick