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Kohler K-77688-NA Aquifer Replacement Filter Cartridge (2 Pack), 2 Count (Pack of 1), White

4.5 4.5 out of 5 stars 436 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Replacement Under-Sink Water Filters by Kohler
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2 Cartridge (Medium)
Replacement Cartridge
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Purchase options and add-ons

Material High-impact plastic construction.
Product Dimensions 3.13"D x 3.13"W x 10"H
Item Weight 3.8 Pounds
External Testing Certification NSF
Brand Kohler

About this item

  • For use with the Aquifer water filtration system (K-77685 or K-77686).
  • High Quality: Coconut shell based Carbon filter in high-impact plastic construction
  • Reduces Chlorine Taste & Odor, Chloramine, Particulate Class I, Lead, Asbestos, Cyst, Mercury, Turbidity, and select Pharmaceuticals. See Performance Data Sheet for individual contaminants and reduction performance
  • 1. 70 gpm (gallons per minute) maximum flow rate at 60 psi
  • Filter head automatically turns off the water supply when cartridge is removed, quarter turn twist cartridge for easy install and replacement
› See more product details

Customer ratings by feature

Easy to install
4.2 4.2
Flavor
4.2 4.2
Value for money
3.3 3.3
See all reviews

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SAMSUNG Genuine Filter for Refrigerator Water and Ice, Carbon Block Filtration, Reduces 99% of Harmful Contaminants for Clean
$40.49
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From the brand

Product guides and documents

Installation Manual (PDF)

From the manufacturer

1

Aquifer Double-Cartridge Water Filtration System

Say hello to Aquifer, a water filtration system that effectively reduces contaminants in your drinking water like lead, mercury, chlorine and pharmaceuticals—without compromising your faucet’s performance.

CONVENIENT INSTALLATION

1

2

3

EASY TO INSTALL

Aquifer can be set up quickly under the sink with a single-inlet faucet.

LONG-LASTING

Double-cartridge system can be used for up to six months.

FAST FLOW

Double-cartridge system offers 1.70 gallons per minute (gpm) flow rate and is suggested for use with regular kitchen faucets that offer a greater flow rate.

1

REDUCES WASTE

Filter cartridges come with a postage-paid envelope, making it quick and easy to return used materials for recycling.

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Kohler K-77688-NA Aquifer Replacement Filter Cartridge (2 Pack), 2 Count (Pack of 1), White

Kohler K-77688-NA Aquifer Replacement Filter Cartridge (2 Pack), 2 Count (Pack of 1), White

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Product Description

Enjoy greater peace of mind about the water you drink at home. Keep your Aquifer water filtration system flowing with this two-pack of replacement filter cartridges. The Aquifer water filtration system effectively reduces contaminants including lead, mercury, chlorine, and pharmaceuticals in your cold water. While many other systems use coal-based media filters, the Aquifer filter uses ground-up coconut shells, making it more .

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Kohler K-77688-NA Aquifer Replacement Filter Cartridge (2 Pack), 2 Count (Pack of 1), White
Kohler K-77688-NA Aquifer Replacement Filter Cartridge (2 Pack), 2 Count (Pack of 1), White
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Price$105.47$70.99$205.00$57.99$54.69-18% $49.49
List: $59.99
Delivery
Get it as soon as Friday, May 17
Get it as soon as Friday, May 17
Get it May 31 - Jun 12
Get it as soon as Friday, May 17
Get it as soon as Friday, May 17
Get it as soon as Friday, May 17
Customer Ratings
4.54.5 out of 5 stars436
4.44.4 out of 5 stars91
4.04.0 out of 5 stars2
4.64.6 out of 5 stars399
4.54.5 out of 5 stars436
4.74.7 out of 5 stars37,060
Easy to install
4.2
4.7
—
4.6
4.2
4.6
Flavor
4.2
4.5
—
4.3
4.2
4.3
Value for money
3.3
4.4
—
4.3
3.3
3.9
Sold By
Amazon.com
WaterdropDirect
Buying Direct Corp
Amazon.com
Amazon.com
Amazon.com
material
High-impact plastic construction.
Plastic
Acrylonitrile Butadiene Styrene
Carbon,Coconut Shell
High-impact plastic construction.
Plastic
product benefit
—
Reduces Chlorine
Removes Odor
—
—
Removes Odor
certification
NSF
IAPMO
NSF
NSF
NSF
NSF
model number
K-77688-NA
WD-W60-80/90
CECOMINOD091782
EFF-6045-3-P
77687-NA
EDR4RXD1
weight
3.8 pounds
—
17.05 pounds
1.97 pounds
1.6 pounds
0.77 pounds

Customer reviews

4.5 out of 5 stars
4.5 out of 5
436 global ratings

Customers say

Customers like the ease of installation, quality, and performance of the water filter. For example, they mention it's easy to install and replace filters, works effectively, and provides great results. That said, some complain about the flow and leakage. Opinions are mixed on value.

AI-generated from the text of customer reviews

36 customers mention31 positive5 negative

Customers find the installation of the potable water filter to be easy. They mention it's simple enough and easy to replace the filter cartridges. They also appreciate the quality of the product and the ease of getting new filters when it'll be time to replace them.

"...I use on my beverage faucet and it works great. Filter is easy to change." Read more

"Exact replacement for my water filtration system. Easy to install and fair price." Read more

"...It was easy to install and the water is clear and tastes good. The flow rate for this filter is a little slow, but not so much that it is a bother...." Read more

"Does a great job of providing great tasting filtered water, easy to install, but high cost." Read more

23 customers mention21 positive2 negative

Customers are satisfied with the quality of the water filter. They mention it's the best water filter, easy to install, and effective. Some say the filter is inexpensive but the water quality is outstanding.

"...It was easy to install and the water is clear and tastes good. The flow rate for this filter is a little slow, but not so much that it is a bother...." Read more

"...I've used this system now for about 3.5 months. It is fabulous...." Read more

"...Initially, the water quality was outstanding...." Read more

"Overall this is a good filter system, and a reasonable DIY project if you've got some wrenches...." Read more

18 customers mention18 positive0 negative

Customers are happy with the taste of the water. They mention that it removes chemicals and gives them fresh, clean water. Some say that it takes the chlorine taste out almost completely.

"...It was easy to install and the water is clear and tastes good. The flow rate for this filter is a little slow, but not so much that it is a bother...." Read more

"Does a great job of providing great tasting filtered water, easy to install, but high cost." Read more

"...Initially, the water quality was outstanding. The taste was fresh and clean, and I was excited to finally have access to pure and healthy water at..." Read more

"...Has taken that chlorine taste out almost completely. About 2mo in so fa so good. We'll see how long this 1st set of filters lasts...." Read more

15 customers mention13 positive2 negative

Customers like the performance of the water filter. They mention that it works effectively, produces great results, and is very efficient.

"Kohler product works well as all the Kohler products that I have ever used. I use on my beverage faucet and it works great. Filter is easy to change." Read more

"...These work well how we there is a high lemon rate it seems. 1 out of 5 filter sets have failed fairly quickly in different locations...." Read more

"It works perfectly if you follow the directions. You need to fully remove the old cartridge according to the directions on Amazon‘s website...." Read more

"Easy to install (took under 10 minutes). And works as expected. Just be sure to check your model number and you shouldn't have any issues." Read more

18 customers mention6 positive12 negative

Customers are mixed about the value of the water filter. Some mention that the manufacturer parts are at a good price, and it's easy to install and replace filters. However, others say that it was expensive and not worth the money, and the cost to replace filters has increased substantially since May.

"...job of providing great tasting filtered water, easy to install, but high cost." Read more

"Exact replacement for my water filtration system. Easy to install and fair price." Read more

"...short life of the replacement cartridges and the cost to replace has increased substantially since May. I will give the replacement cartridges one..." Read more

"Easy install good water taste . Filter replacement expensive ." Read more

14 customers mention4 positive10 negative

Customers are dissatisfied with the leakage of the potable water filter. They mention that it leaks a lot, and the replacement filter leaked when installed. Some say that the filter fits fine but does not fully seal.

"...All was well. Replaced both filter cartridges in May 2021, but one of them leaked...." Read more

"Well, it leaked a lot, but after reading reviews I came across one that said to uninstall and reinstall, which I did. No more leaking!" Read more

"...years on my fridge, and I like how easy they are to replace, and they don't leak...." Read more

"I have purchased a couple of these. The second one leaked a little after installation but I removed it and reinstalled and the leak stopped." Read more

12 customers mention3 positive9 negative

Customers are dissatisfied with the flow of the water filter. They say that the water flow has been decreasing steadily, and it now trickles out at a slow rate. Some customers also mention that the filter clogs and reduces the waterflow after just a month.

"...The extremely low flow rate has made it frustrating to use, as filling a glass or a water bottle takes an excessive amount of time...." Read more

"...But now after 5 months the water flow is about 50% less than it was when the filters were new. Also, a noticeable chlorine taste has returned...." Read more

"Water flow was good. Water tastes good. Hope it will last a few months. I really like it so far." Read more

"...Since then, the flow has been decreasing steadily. It is now at 0.5 gpm. After checking for kinks and blockage, I called Kohler support...." Read more

DO NOT BUY THIS FILTER!
1 Star
DO NOT BUY THIS FILTER!
I recently purchased a Kohler under-the-sink water filter with high hopes, as I've heard great things about Kohler's product quality. While the installation process was easy and the filter's design is aesthetically pleasing, I am extremely disappointed with its performance after just a month of use.To start with the positives, the installation was a breeze. The instructions provided were clear and easy to follow, and I had the system set up and running in no time. I also appreciate the sleek and modern design of the filter, which seamlessly blends with my kitchen's décor.Initially, the water quality was outstanding. The taste was fresh and clean, and I was excited to finally have access to pure and healthy water at home. The filter seemed to deliver on its promise of removing impurities and contaminants from my tap water.Unfortunately, my satisfaction was short-lived. After just a month of use, the water flow from the filter has reduced significantly. The extremely low flow rate has made it frustrating to use, as filling a glass or a water bottle takes an excessive amount of time. I've tried troubleshooting the issue and checking for potential blockages or air bubbles, but to no avail.Considering the premium price I paid for the Kohler under-the-sink filter, I expected a high-quality and reliable product that would last me a considerable amount of time. Regrettably, this filter has failed to meet my expectations, and I am left feeling disappointed and regretful about my purchase.In conclusion, while the Kohler under-the-sink filter may be easy to install and visually appealing, its subpar performance after just one month of use is unacceptable. I would not recommend this product to others, and I suggest potential buyers to explore alternative options in the market for a more reliable and durable water filtration solution.
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Top reviews from the United States

J. H.
5.0 out of 5 stars Inexpensive but effective water filter
Reviewed in the United States on January 11, 2024
Pattern Name: 1 Cartridge (Medium)Style: Filtration SystemVerified Purchase
Kohler product works well as all the Kohler products that I have ever used. I use on my beverage faucet and it works great. Filter is easy to change.
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Nikki FL
5.0 out of 5 stars Easy to install
Reviewed in the United States on March 30, 2024
Pattern Name: 2 Cartridge (Medium)Style: Replacement CartridgeVerified Purchase
Exact replacement for my water filtration system. Easy to install and fair price.
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Bill
5.0 out of 5 stars Best under the sink filter - NSF/ANSI standards 42, 53, and 401
Reviewed in the United States on August 10, 2019
Pattern Name: 1 Cartridge (Medium)Style: Filtration SystemVerified Purchase
I did many hours of research before selecting this filter to replace a Woder filter I had been using. This Kohler model has been tested for NSF/ANSI standards 42, 53, and 401, which few under the sink filters can claim. It was easy to install and the water is clear and tastes good. The flow rate for this filter is a little slow, but not so much that it is a bother. They sell a model (KOHLER 77686-NA) that takes two of these filters to double the flow rate, which I am sure would be adequate for most anyone.
2 people found this helpful
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rocknrick
5.0 out of 5 stars This is the best DIY water purifier filtration system!
Reviewed in the United States on May 12, 2020
Pattern Name: 1 Cartridge (Medium)Style: Filtration SystemVerified Purchase
I've tried several different brands and models. Some of these were difficult to install (GE; gasket is too thick, so the lid is too difficult to tighten...even with a water filter wrench) or too expensive to maintain (Body Glove, etc.). THIS water filtration system by Kohler was unbelievably easy to install and relatively inexpensive to replace filters (~$50 each on Amazon). NOTE: I'm hyper careful with anything to do with water/plumbing or electricity. My preference is to hire professionals to touch these aspects of my home. However, I could not afford an expensive plumber. So, I studied YouTube instructional videos and did a lot of online due diligence. This Kohler Aquifer Filtration system seemed to be the right solution. After receiving the filtration system (and stopping by Home Depot to get some connector parts for my cold water shut-off split pipe (...one that fed into an old/unused Insta Hot tap) and also purchasing a Kohler brushed nickel water filter faucet (to replace the Insta Hot faucet), I safely installed this Kohler filtration system. It was relatively easy and straightforward. NOTE: leave yourself a few inches of space beneath the filter so that it can be unscrewed/removed when ready for replacing. I've used this system now for about 3.5 months. It is fabulous. (The reason why I got this filter -- I upgraded by refrigerator to a model that does NOT have any water or ice maker; I got tired of reliability problems. I wanted a long-life, reliable refrigerator (after my Samsung fridge started having problems after only 8 years!). The only potential negative -- my family so enjoys using the Kohler filtered water, that I'll likely need to replace the filter after 5 months (Kohler recommends every 6 months).
2 people found this helpful
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hlh
4.0 out of 5 stars Excellent filter, but pricey
Reviewed in the United States on February 17, 2021
Pattern Name: 1 Cartridge (Large)Style: Replacement CartridgeVerified Purchase
Does a great job of providing great tasting filtered water, easy to install, but high cost.
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JP
5.0 out of 5 stars Simple and effective
Reviewed in the United States on October 4, 2018
Pattern Name: 2 Cartridge (Medium)Style: Filtration SystemVerified Purchase
I like Kohler's simple product line - either the 1 or 2 filter model, and the 2 filter model is 2 identical filters in parallel for higher flow. That makes a lot of sense vs sacrificing the quality of your filters. I have used the 1/4 turn to lock cartridges for many years on my fridge, and I like how easy they are to replace, and they don't leak.

The two filter model has WAY more flow than my fridge did. I also like that the filters came shrink wrapped. It all looks very professional.

I had to have a plumber help install this and a new faucet because I did not have 3/8" supply from the shutoffs. (I had 1/2"). If you have 3/8, this might be a DIY job.

Some things I don't like:

- inlet/outlet not labeled on the _outside_ of the unit. You have to take the top lid off to see. This confused the plumber for a while. When you're paying $200/hr, make things as simple as possible. I drew an arrow on with a sharpie.
- the plastic hoses weren't cut square on the ends. the plumber said it shouldn't be a problem, but I wasn't impressed.
11 people found this helpful
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Douglas Criner
5.0 out of 5 stars Very pleased - high quality
Reviewed in the United States on November 2, 2019
Pattern Name: 2 Cartridge (Medium)Style: Filtration SystemVerified Purchase
This replaced my original, older-model Kohler under-sink water filter - which is discontinued. Installation was simple and similar to my older model. The PVC tubing provided by Kohler plugged right into the drinking water faucet that I also bought from Amazon. You do need access to a wooden surface under your sink to attach the filter housing (screws not provided). You also need to install a stop valve on your existing plumbing (valve not included). ( If you are handy and have some plumbing experience, this can be installed by DIYers. Otherwise, call a plumber.) I only use the under-sink filtered water for drinking - I will probably stretch the recommended 6-month replacement interval for the filter cartridges. The two filters are piped in parallel - to reduce pressure loss through the filters.
One person found this helpful
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Top reviews from other countries

Translate all reviews to English
Everett Krohn
5.0 out of 5 stars Quality
Reviewed in Canada on August 7, 2023
Pattern Name: 2 Cartridge (Medium)Style: Replacement CartridgeVerified Purchase
Excellent 😀
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Benoit Laplante
4.0 out of 5 stars Dispendieux
Reviewed in Canada on November 19, 2021
Pattern Name: 1 Cartridge (Medium)Style: Replacement CartridgeVerified Purchase
Ça fait plusieurs années que j'ai un système KOHLER je trouve ça très efficace mais les cartouches sont de plus en plus dispendieuses et j'ai été obligé de changer de système car KOHLER ne vendait plus les cartouches du système que j'avais acheté 2 ans au paravent !
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Aviv Plumbing Inc
5.0 out of 5 stars Original replacement part.
Reviewed in Canada on July 12, 2021
Pattern Name: 1 Cartridge (Large)Style: Replacement CartridgeVerified Purchase
The product is a genuine replacement part and far exceeded the performance of a less expensive one I bought before. The generic did not work at all.
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phosfiend
5.0 out of 5 stars Super easy to install & good flow
Reviewed in Canada on March 5, 2021
Pattern Name: 2 Cartridge (Medium)Style: Filtration SystemVerified Purchase
As the title states - very easy install & good water flow. Our default pressure is very high, and this filter system only takes the pressure down a bit.
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SuECeZ
5.0 out of 5 stars Excelente
Reviewed in Mexico on April 29, 2020
Pattern Name: 2 Cartridge (Medium)Style: Filtration SystemVerified Purchase
Excelente producto, elimina por completo los malos sabores del agua y está ayudando a mis gatos a no generar cristales en la orina. Lo único malo es que no es medida estándar para las tuberías de México y hubo que hacer adaptaciones
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