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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29
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Description
KOHLER K-21371 Aquifer Refine Water purification system with KOHLER KonnectFeel confident with every sip that you are getting nothing but the best for you and your family. The Aquifer Refine water filtration system with KOHLER Konnect voice activation technology, effectively reduces contaminants including bacteria, virus, lead, mercury, chlorine select pharmaceuticals, VOC's and more in your cold water. While many other systems use coal based media filters, Aquifer Refine uses three recyclable filters: two carbon block
Feel confident with every sip that you are getting nothing but the best for you and your family. The Aquifer Refine water filtration system with KOHLER Konnect voice-activation technology, effectively reduces contaminants including bacteria, virus, lead, mercury, chlorine select pharmaceuticals, VOC's and more in your cold water. While many other systems use coal-based media filters, Aquifer Refine uses three recyclable filters: two carbon block filters and an ultra-filter. Under-sink installation is fast and easy, and the compact Aquifer Refine system fits alongside garbage disposals and household items stored below the sink.
- Three-stage purification system with KOHLER Konnect voice activation technology lets you know your water usage and filter life.
- Reduces over 95% of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) in drinking water.
- Ultra-filter membrane technology reduces bacteria and virus in the water.
- Reduces contaminants such as bacteria, virus, lead, mercury, chorine, select pharmaceuticals, VOC's and more.
- AC-powered operation—no batteries to replace (requires AC power outlet).
- Provides up to 792 gallons, or the equivalent of over 5,800 16.9 fl oz bottles of water (results may vary based on water pressure, temperature and incoming water quality).
- 0.65 gpm (2.46 lmin) maximum flow rate at 60 psi (4.14 bar).
- Filter head automatically turns off the water supply when cartridge is removed.
- Includes three filter cartridges (K-21372, K-21373, K-21374).
- Recommended for use with beverage faucets, such as Wellspring.
Additional Resources
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
The Best Fluoride-Free Toothpaste I've Tried
Flavor Name: 1. Sensitive Mint, Size: 5.25 Ounce (Pack of 1)
I've been using Davids Hydroxi Fluoride-Free Nano Hydroxyapatite Toothpaste for several weeks, and it has completely exceeded my expectations.
The first thing I noticed was how clean and smooth my teeth felt after brushing. Unlike many natural toothpastes, it leaves a genuinely fresh feeling without being overly harsh. The natural peppermint flavor is refreshing and pleasant without the intense burn that some mint toothpastes have.
What really impressed me is the nano-hydroxyapatite formula, which is designed to support enamel remineralization and reduce sensitivity. My teeth have become noticeably less sensitive to cold drinks, and they feel stronger overall. Nano-hydroxyapatite is gaining attention as a fluoride alternative because it can help replenish minerals in enamel and reduce sensitivity.
I also appreciate that it's:
Fluoride-free
SLS-free
Made in the USA
Vegan
Uses high-quality ingredients
Comes in a recyclable metal tube
The whitening is subtle but effective. My teeth look brighter without any increased sensitivity, and the toothpaste is gentle enough for daily use. The inclusion of xylitol and hydroxyapatite makes it feel like a premium oral care product rather than just another natural toothpaste.
While it's more expensive than conventional toothpaste, the quality and ingredients justify the price. Even dental professionals reviewing hydroxyapatite toothpastes have noted benefits for remineralization, sensitivity relief, and plaque reduction.
Overall: 5/5 stars. If you're looking for a fluoride-free toothpaste that supports enamel health, helps with sensitivity, and leaves your mouth feeling exceptionally clean, Davids Hydroxi is absolutely worth trying. Highly recommended!
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Reviewed in the United States on June 3, 2026
★★★★★ 5
Mild mint taste
Flavor Name: 1. Sensitive Mint, Size: 4 Ounce (Pack of 1)
I wanted to go fluoride free with my toothpaste so I decided to give this a try. I like that the flavor isn’t overly strong and it hasn’t caused any irritation at all. It doesn’t foam up as bad as my old toothpaste did. It is important to me that it’s all natural and fluoride free. My first check up at the dentist after using it went really well so it cleans your teeth really well. I would recommend it
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Cleaner & Brighter Teeth.
Flavor Name: 1. Sensitive Mint, Size: 4 Ounce (Pack of 1)
I like the minty taste. My mouth feels fresh and my teeth look brighter & clean. Love this! Will definitely get this again.
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Reviewed in the United States on May 22, 2026
★★★★★ 4
Clean feel and gentle on teeth
Flavor Name: 1. Sensitive Mint, Size: 4 Ounce (Pack of 1)
I picked up this toothpaste because I wanted to try something a little different that focused on a more natural feel while still keeping my teeth clean, Between coffee daily meals and just normal wear I was looking for something that felt effective without being harsh, I wasnt sure how I would like a fluoride free option but it has been a nice change
When it arrived the first thing I noticed was the clean simple packaging and the peppermint scent, The texture is smooth and spreads easily without being overly foamy, It has a mild mint flavor that feels fresh without being too strong or overpowering, My spouse tried it as well and said it felt less intense than typical toothpaste which was actually a positive
After using it regularly my teeth felt clean and smooth without that overly stripped feeling some products leave behind, It has been gentle enough that I did not notice any sensitivity or irritation which is something I always pay attention to, The overall experience feels more balanced and not overly aggressive
I also like that it does not have a long list of harsh ingredients and still manages to do the job, It fits easily into a daily routine and does not require any adjustments or special steps, The tube size is practical and easy to store
For anyone looking for a toothpaste that feels gentle clean and a bit more natural this has been a good option, It keeps things simple while still providing a fresh feeling after brushing
I currently highly recommend this product. However, should issues arise I will update my review accordingly.
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Reviewed in the United States on April 13, 2026
★★★★★ 5
Only toothpaste in my household
Flavor Name: 1. Sensitive Mint, Size: 5.25 Ounce (Pack of 1)
Love this toothpaste, no fluoride, great taste, fresh breath. Great value for the price as the tube is quite large. Only downfall if that it doesn't foam well which you will find with any toothpaste not full of nasty chemicals. Only thing my family uses.
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Reviewed in the United States on May 11, 2026
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