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💧 Elevate your tap water game—pure, powerful, and hassle-free!
The Frizzlife FK99 Under Sink Water Filter System delivers NSF/ANSI 42 & 53 certified filtration with a 0.5-micron carbon block filter that removes 99.99% of chlorine, lead, VOCs, and odors while preserving beneficial minerals. Engineered with durable lead-free brass fittings and an auto-shutoff feature, it ensures leak-free, easy filter changes without shutting off water. With a 10,000-gallon capacity and quick DIY installation, it’s an eco-friendly, cost-saving upgrade for any kitchen, office, or rental space.



















| ASIN | B09NKNSQ2T |
| Best Sellers Rank | #28,722 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #53 in Under-Sink & Countertop Filtration |
| Brand | FRIZZLIFE |
| Brand Name | FRIZZLIFE |
| Capacity | 0.5 Micron |
| Container Type | FKrost |
| Customer Reviews | 4.5 out of 5 stars 6,861 Reviews |
| Filter Life Cycle | 12 Months |
| Included Components | Instruction Manual |
| Installation Type | Under Sink |
| Manufacturer | Frizzlife |
| Material | carbon block |
| Material Type | carbon block |
| Maximum Flow Rate | 2 Gallons Per Minute |
| Model Name | fk99 |
| Model Number | FK99 |
| Other Special Features of the Product | Automatic Shut-Off |
| Package Information | FKrost |
| Part Number | FK99 |
| Power Source | Manual Operation |
| Product Shelf Life | 365 Days |
| Purification Method | Carbon Block |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Feature | Automatic Shut-Off |
| Supported Water TDS Level Maximum (PPM) | 300 |
| UPC | 850026491807 |
| Upper Temperature Rating | 100 Degrees Fahrenheit |
C**L
5 star
I got this MK99 around 2 weeks ago, went with Frizzlife brand search and directly bought this one as my friend told me that I might want to try this filter, so yes, she got one and now I have one too. Ok, I will share for now why it’s worthy a 5 star! Star 1, the packaging of the product is with a decent pack, not luxury but very neat! LOVE Star 2, with the help of instruction and the YouTube installation video, the installation is without a hitch, it’s amazing that I don’t need a plumber to do this, Installation took me 7 minutes and 16 seconds, LOVE Star 3, the water taste is just like a real water it should be, orderless and taste great! 1000 times better!! Use test kit for the chlorine and LEAD, it’s just work as described. LOVE Star 4, for how convenient it is to replace the filter, the cost of replacement is very reasonable, no more Brita and no more struggling for the refrigerator filter. I tried twist off the container without shutting off the valve, it’s amazing that no water come out from the head, what a technology!! LOVE Star 5, I suppose this will for the customer service, my first test was using TDS meter, not happy with the result, emailed the company and they are sooo quick to help me out and NOW I KNOW WHY, searched from google as well, TDS is only used for Reverse Osmosis system and to check how good the RO does, but RO has no mineral in water , that’s why. The water from the Frizzlife MK99 leaves all essential minerals in the water, which is very good!! LOVE Overall, I highly recommend! And hope my review is helpful for everyone who is still hesitating whether to buy.
D**S
Excellent Water Quality and Easy Installation!
I recently installed the Frizzlife Under Sink Water Filter System, and it has exceeded my expectations! This filter system is NSF/ANSI 53 & 42 certified, ensuring that it effectively removes contaminants while enhancing the taste and quality of my drinking water. The installation process was straightforward and hassle-free, taking less than an hour. The clear instructions made it easy to connect the system to my existing plumbing without the need for professional help. I love that it doesn’t take up much space under the sink, leaving room for other essentials. Since installing the filter, I’ve noticed a significant improvement in the taste of our tap water. The water tastes fresh and clean, and I feel much more confident about the quality of what I’m drinking. The filtration system effectively reduces chlorine, heavy metals, and other impurities, which is crucial for my family’s health. Another feature I appreciate is the filter replacement indicator, which makes it easy to know when it’s time for a change. This system not only saves us money on bottled water but also contributes to reducing plastic waste. If you’re looking for a reliable and efficient under sink water filter system, I highly recommend the Frizzlife Under Sink Water Filter System. It’s a great investment for anyone wanting to improve their water quality!
T**R
Mixed bag - good initial flow but required modifications and filters extremely difficult to change
I've had this filter for 6+ months now and felt like it was time to put in a review. First things first, you should never trust a review from someone who just installed a consumable system like a water filter, as it will typically perform very well initially and issues arise down the line. Let's start with the good here: It's inexpensive for the advertised flow rate - this is one of the only filters on the market that advertises over 2gpm, and it is capable of reaching that with a brand new filter. However, at least with our water source (New York City), that performance degrades SUBSTANTIALLY after a few weeks, to the point where it gets down to a trickle. Frizzlife stood behind their product and sent a second filter, but the same thing happened again within a few weeks so it seems our water's particular composition and this type of filter media don't play nicely together. I solved for this by installing a pressurized water tank in line after the filter stage, more commonly used with Reverse Osmosis systems (but works perfectly here as well) so that the first quarter gallon is full speed ahead even with the water supply shut totally off (and the tank refills as it dispenses) - this has resolved my flow rate issues permanently. Good quality metal hoses are included, but unfortunately that's more of a problem for me because my existing water filter connection requires push to connect plastic fittings. I fashioned an adapter from a 3/8 NPT to 1/4" push-to-connect after the tank stage to address this, but it would be nice if they included a few adapters in the box because they're surprisingly hard to find but cost next to nothing. It's definitely doing something! Take a look at the picture above, about 5 months after the filter was installed it's absolutely disgusting looking with the color of a cigarette filter. This will not lower your TDS reading, and they're very clear about that, but the drinking water it produces tastes good and clearly lacks the nasty stuff it's pulled out above. Now, let's talk about the bad parts: This is only a direct connection if you have the rare filtered water spout that accepts a 3/8" NPT or 1/2" NPT connection, as these are the only connectors and adapters provided. If you look at any of the most popular filtered water faucets sold on Amazon, the vast majority use 1/4" quick connect push-to-fit connections. Whether or not you think there are long term reliability issues with such connections, that is what most people already have in place, meaning you're headed to the hardware store to try to rig together some kind of adapter, which is likely to have more leak potential than a direct connection. They should at least include adapters they've tested and endorse in the package to avoid this. Removing the filter assembly from the bracket is super easy, it rotates out and twists off - anyone can do this. However, you haven't changed your filter at that point... this is not a drop in replacement - they sell the inner filter medium by itself, and include a special plastic wrench for opening the filter assembly housing to replace the medium. This works great when it's new, but when I went to change filters (see above) it would not budge under any circumstances - I put it in a vice and used a mallet to the point that the plastic wrench started to strip. I ended up having to buy a set of oil filter pliers to counterhold and twist, and finally was able to open it, but this is exponentially more difficult and time consuming than a system like 3m Filterete where the replacement filters come ready to screw in. I get that it saves plastic and likely benefits the environment, but man, their implementation is not up to the task. Tl;dr? Good performance for the money but changing filters sucks and it doesn't come with what you need to connect to the vast majority of filtered water faucets, ice maker lines and other things you might need filtered water for. I wouldn't buy it again but I'm also not going out of my way to replace it now that it's plumbed in.
C**A
Works Wonderfully; Pays for Itself!
Moved into a house where the well is out in a lake, and despite the well being filtered, having a standard sand filter and water softener on top of it for the house, the sink water always tasted nasty. Part of that was due to the anti rust stuff the softener salt had (which we discontinued), and just the nature of the lake water. Well, let me tell you, the picture I attached is the filter after just short of six months of usage! Just swapped it out tonight as the sink had gone down to a trickle this week. The pic doesn't do it justice how much junk it really filtered out! The taste was gone instantly and the water began to taste great. No odd particulates, odors, etc. were coming out anymore. We use the cold water a lot in our home. Aside from dishes, we make iced tea, fill up the tea kettle, coffee maker, fill up the ice cube trays, etc. What a world of difference in quality and taste this filter made! Let me also tell you, I HATE plumbing related work when I have to do it myself. I will do electrical work all day long, but plumbing is a chore. This was so ridiculously easy to install, I thought I got it wrong the first try. Well it was a breeze to install AND change the filter out. I'm so impressed with this filter I'm bothering to do this review! Great filter, worth every penny!!!
M**.
Easy install, good performance
I was looking for a water filter that didn't need a separate faucet since that would be difficult to install with our countertops. As I researched I also became aware of the NSF/ANSI 53 certification, and since we live in an area where PFAS are a concern, I also wanted a filter that carried that certification. This water filter met my criteria and was very easy to install. It just takes installing the mounting bracket and then inserting the filter into the water line. The included hardware and hoses feel very high quality. I also like that filter changes on this product replace just the inner media, so there's no throwing out a big hunk of plastic on each change as with the filter in our refrigerator. We are on a municipal water system and the supplied water drawn from wells is perfectly drinkable, but is relatively hard and has some taste issues. The filter definitely improves the taste of our water making it pretty much neutral, which I think is how water should taste. I think there might be a very slight reduction in water flow with the filter in place, although it's small enough that I'm not really sure. I liked it enough that I bought a second one for another sink.
K**N
Great value, but requires some undocumented maintenance when replacing the filter.
Easy to install, keeps water clean for a long time, doesn't slow the flow too much, though the reduced flow is noticeable. Keeps my coffee and tea tasty. I just changed the filter for the first time, and it immediately started leaking. I had to disassemble the cartridge to clean and grease all of the o-rings to seal it. That's not in the instructions, and the filter change kit does not include the plumber's silicone grease. I still think it's worth it, but this should have been in the instructions, or noted in the replacement filter kit somewhere. Edit 10Aug2025: I emailed Frizzlife support to see if the leak I encountered was a common problem and then sent me a replacement cartridge to be sure the o-rings were properly sealed. Great customer service!
S**R
Very good
Easy to install, good flow, catches a lot of debris. Got a few of these for different sinks
L**0
FRAUD! WATER TESTED-NO CHANGE In quality!!
In spite of being easy to install for me, a single mom, I was most concerned with water quality as we were notified by our municipal water dep't that we have lead in our water. First I purchased a water pitcher for the refrigerator with a built in filter by ZERO WATER. It came with a water tester so you would know when to change the filter. That soon became annoying refilling the water in the pitcher. That is when I purchased this FRIZZLIFE under sink filter. It came with all the same claims as my refrigerator water pitcher did. So I purchased it and installed it. Now let me say this, with the water tester I tested the water of a bottle of spring water which had a test rating of 003 ppm, at the same time tested the water pitcher (new at that time) and it had a rating of 000 ppm and our tap water rating at that time was 096ppm. So I was obviously sold on the ZERO WATER FILTER BRAND but I couldn't find an under sink filter by them so I went with this one. AFTER installation, I was shocked. The FRIZZLIFE filter had the same water quality as before I changed it! I am showing in the pictures a glass of water tested from my Zero Water filter. Looks like it's time to change the filter as it's showing 003 ppm. I am showing water coming out of my tap and the quality of that is over 80 ppm. That is water I don't want to drink. That is water that our municipal City department said has lead in it. The next picture is a picture of water that came out of the frizz Life water filter system that was installed under my sink and yes it does have a filter in it I checked! And the quality of that water is IDENTICAL TO THE WATER QUALITY COMING OUT STRAIGHT FROM THE TAP! AS YOU CAN SEE THERE IS NO CHANGE! NO DIFFERENCE! (There's a different glass for the Zero Water filter because I'm about to drink that glass.) So to sum up, obviously I'm returning this because it's a fraud. And I hope you don't make the same mistake I did. or at least test the water before and after installation to make sure you are actually getting filtered water!
H**G
Good quality product and water taste great
Installation was straightforward and it came with all the bits and pieces.
F**Z
LOVE LOVE LOVE
This is a review for both MK99 and MP99: I bought MK99. I was very impressed with it, so I decided to buy MP99 and replace my existing designated water spigot that has Rainfresh ceramic filter system. Rainfresh is a very complicated system. When it was time to replace the ceramic filter, I thought of buying MP99. MP99 was a little expensive, but it was simpler, very simple to install. From my main water supply, the water runs through MK99, then using the T-valve that comes from MP99, i used it to run the water from MK99 to my main kitchen faucet, then the other line to MP99, to the spigot. My main faucet is filtered once, which is good enough for me, but the water to my spigot is filtered twice. I had a request to the seller to make my system more efficient. I will not go into details, but when I emailed the seller, I got an immediate reply in a matter of minutes. WHAT THEY OFFERED, WAS FAR AND BEYOND WHAT I WAS ASKING. Amazing customer service. The prompt reply and the solution they offered were phenomenal. I AM EXTREMELY HAPPY WITH MY NEW WATER FILTER SYSTEM, much simpler than my Rainfresh ceramic system. EXTREMELY HAPPY AND OUTSTANDING CUSTOMER SERVICE. Btw, this doesn't bring the TDS to zero, bec it only filters heavy metals and let minerals run through. Also, for those saying that it doesn't have certification. YES, IT DOES. It is certified by IAPMO R & T, which is the certification in NORTH AMERICA!! CHECK IT OUT, THEY HAVE A WEBSITE, and you can see that FRIZZLIFE is certified. LOVE, LOVE, LOVE THIS!!
D**S
Kaltes klaren Wasser ☺️
Wir trinken fast ausschließlich Wasser aus der heimischen Wasserleitung. Zum einen ging mir die Schlepperei gegen den Strich, und zum anderen ist es unter Umständen auch noch günstiger. Laut unserer Stadtwerke haben wir sehr gutes Wasser was aber sehr Kalkhaltig ist. Das sieht man sehr schön am Wasserkocher und an der Kaffeemaschine. Das war aber nicht der Grund warum wir uns nun einen Wasserfilter gekauft haben. Jeder weiß das Wasser das strengste kontrollierte Lebensmittel ist was wir haben. Leider kontrolliert aber keiner die Belastung des Wassers die zum Beispiel durch alte Rohre im Haus entstehen. Darüber habe ich mir allerdings auch noch nie Gedanken gemacht. Für mich ist es selbstverständliche den Wasserhahn aufzudrehen und davon zu trinken. Wie dem auch sei. Wasser gut, Haus alt = vielleicht schlechtes und ungesundes Wasser? Laut einen Bericht auf einer bekannten Internetplattform sollte man Leitungswasser nicht in großen Mengen und wenn doch nur abgekocht zu sich nehmen. Ersthaft? Das ist mir zu viel Stress. Also mein Smartphone raus und schauen was Amazon in dem Bereich so anbietet. Denn das Netz ist voll davon. Und da ich mich stark auf Rezessionen fokussiere, und schon diverse mal auf die Fre..e gefallen bin, schreibe ich immer ein wenig mehr als es hätte sein müssen. Nun denn. Welcher Filter sollte es sein? Wie gesagt es gibt eine große Auswahl von Wasserfiltern. Auch die Preisspanne ist groß Er sollte unter der Spüle in der Küche seinen Platz finden. Anschlussschläuche sollten dabei sein. Wandmontage wünschenswert ab nicht zwingend. Der Aufbau sollte leicht von der Hand gehen, der Filter wechsel sollte ohne größere Umbauten von statten gehen. Ach ja die Folgekosten durch neue Filter sollten überschaubar sein. Beim stöbern bin ich bei dem Wasserfilter von Frizzlife hängen geblieben. Eine schöne Anzeige mit vielen Infos. Da der Filter grade im Angebot war landete er im Einkaufwagen und einen Tag später bei mir. Im Karton der Filter der in Folie eingeschweißt ist, alle Leitungen, einen Adapter für ein anderes Zollmaas, Teflonband zum Abdichten, Schrauben für die Wandhalterung, und zwei Schlüssel zum öffnen des Filters, und den üblichen Papierkram. Die Aufbauanleitung ist bebildert und wird in diversen Sprachen angeboten. Da der Aufbau aber selbsterklärend ist, und am Filtergehäuse steht was der Ein und was der Ausgang ist, werden viel Personen keine Anleitung benötigen. Ich habe für den ganzen Aufbau ca. 15 Minuten gebraucht was ich völlig in Ordnung finde. Der Hersteller gibt vor den Filter 10 Minuten Wasser durchlaufen zu lassen. Also Alexa stelle einen 10 Minuten Timer. In der zwischenzeit konnten ich prüfen ob es undichte Verbindungen gab. Glücklicherweise gab es aber keine. Den Halter mit dem Filtergehäuse in dem sich das eigentliche Filterelement befindet eben noch mit den mitgelieferten Schrauben an der Wand befestigen, dann ist die Installation beendet. Und nu? Nichts. Ist der Filter durchgespült kann man alles das machen was man sonst auch macht. Wasser in die Kaffeemaschine oder den Wasserkocher füllen, Essen damit kochen oder trinken. Ja ich weiß macht Sinn. Aber kann man Unterschied erkennen, schmecken wat ever? Zum Geschmack. Ich habe mich nie über unser Leitungswasser beschwert es war okay für mich. Nun habe ich allerdings das Gefühl das es anders schmeckt. Das bezieht sich auch auf Kaffee oder Tee. Der Geschmack ist mMn nach weicher. Wasser welches im Topf oder im Wasserkocher heiß gemacht wird hinterlässt keinen weißen Rand mehr. Zufall? Der Hersteller gibt an das 99.99% der Verunreinigungen entfernt werden, und alle wichtigen Mineralien enthalten bleiben. Schwermetalle, Chlor usw. werden reduziert. Das sind natürlich alles schöne Worte. Kann ich allerdings nicht so ohne weiteres bestätigen. Ich bin allerdings sehr zufrieden mit dem Filter. Das Wasser schmeckt mir besser und auch Kalk scheint nur noch in reduzierter Form vorhanden zu sein. Bleiben noch die Folgekosten. Im Gehäuse, welches sehr stabil daher kommt, befindet sich das Filter Element. Der Filter hält zwei Jahre. Empfohlen wird nach 6-8 zu tauschen. Das zweier Set kostet knapp 40€. Der Tausch des Filters ist sehr einfach. Dazu einfach das Filtergehäuse knapp 45 Grad nach Links drehen. Wasser abdrehen muss man nicht. Mit der mitgelieferten Schlüsseln die Deckel abschrauben und das Filterelement wechseln. Bin zufrieden, kann es weiterempfehlen.
R**G
No more lead!!!
Only been in about a week now…so far so good!?
A**S
Good product - Recommend
I use a similar filter system in my motorhome & decided to purchase & install a domestic under-sink version on the cold water tap in the kitchen. Installation was straightforward and after flushing water through for 3 minutes the result was impressive. The water tasted fresh. I conducted a blind tested on my partner & she agreed the taste had improved.
Trustpilot
2 weeks ago
4 days ago