Frizzlife MK99 Under-Sink Water Filter Review 2022

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This is our review of the Frizzlife MK99 Under-Sink Water Filter System.

Looking for an under-sink water filter for your household is not an easy task, but we are here to support you. We used our accumulated knowledge of water filtration systems to perform an extensive review of the Frizzlife MK99 Under-Sink Water Filter to help you decide if this system suits your needs.

The Frizzle MK99 Under Sink Water Filter is a great choice for a simple under-sink filter, as this affordable under-sink water filter is NSF certified, removes 99.9% of 58 contaminants found in municipal water, keeps the healthy minerals in the water, and is quick and easy to install and maintain.

In this comprehensive Frizzlife MK99 Under-Sink Water Filter review, we will analyze the filtration capabilities, the system capacity & longevity, its flow rate, the installation & maintenance process, and discuss customer reviews and potential alternatives for this under-sink water filter system.

Let’s get started!

Frizzlife MK99 Under-Sink Water Filter Overview

The Frizzlife MK99 is a point-of-use (POU) simple under-sink water filter, which means that is installed in your kitchen (or in another sink you want) to filter the water from that specific point of use.

Unlike a conventional under-sink water filter that comes with a specific faucet to deliver the filtered water, a simple under-sink water filter like the Frizzlife MK99 is connected directly to the cold water line, filtering all the water used on that sink, and making the installation process much easier.

This device can filter up to 99.9% of contaminants usually found in municipal water using a 2-stage filtration process that combines different high-quality filters to target different contaminants.

Another differentiating factor of the Frizzlife MK99 is that it is NSF certified, having NSF 42 and NSF 53 certifications, which means that was tested and certified by an independent agency to remove the contaminants as advertised. Most of the competitors mention that their devices are tested to remove against these standards, but most don’t have the certification that proves it.

Like most simple under-sink water filters, the Frizzlife MK99 has a quick and easy installation process that can be completed in minutes. And changing the filters is equally easy, as this system includes an automatic water shut-off capability to speed up the process.

Frizzlife MK99 Under-Sink Water Filter Filtration Capabilities

The Frizzlife MK99 Under-Sink Water Filter can remove up to 99.9% of the most common water contaminants, such as chlorine, heavy metals (lead, copper, cadmium, mercury, arsenic, etc.), VOCs, rust, sand, fluoride bad taste & odors, and much more, all without removing key minerals from the water, like calcium magnesium, and potassium, ensuring that you will get clean and tasty water to drink.

The contaminants reduction is achieved through a 2-stage filtration process, in which in the 1st stage a 5-micron sediment filter removes larger particles like sand st, rust, and others, and in the 2nd stage, a 0.5-micron block carbon filter reduces smaller contaminants such as chlorine, heavy metals, VOCs, etc.

One nice feature of the Frizzlife MK9 is the fact that it is NSF certified. This undersink water filter has the NSF 42 and NSF 53 certifications, which means that it is properly tested and certified to reduce lead, arsenic, fluoride, etc (by NSF 53), chlorine, VOCs, and bad taste & odors (by NSF 42).

Like most under-sink water filters, the Frizzlife MK99 is not designed to reduce TDS (total dissolved solids) from the water, so it also won’t remove healthy minerals from the water. This makes it a good option for city water, not well water.

If you need to treat well water and/or reduce TDS, the best option is to buy a good Reverse Osmosis system.

Frizzlife MK99 Under-Sink Water Filter Capacity & Longevity

The Frizzlife MK99 Under-Sink Water Filter has a capacity to filter up to 1.600 gallons of water, which should last between 6 to 8 months for an average-sized family.

This is in line with the average lifespan of other top competitors, but they are a few that last longer than this.

You will notice that it is time to change the filter when the flow rate starts to decrease and/or the water taste is not as good as before.

Frizzlife MK99 Under-Sink Water Filter Flow Rate

The Frizzlife MK99 has a good water flow rate, as it can reach 2 GPM (gallons per minute), enough to fill a 330 ml glass of water in a few seconds.

This high capacity is enough for you not to have to worry about waiting to get clean water to drink and cook, even if you have a large family.

Frizzlife MK99 Under-Sink Water Filter Installation & Maintenance

Like most simple under-sink water filters, the MK99 under-sink water filter installation is really easy and quick to perform.

As you just have to connect it directly to the cold water line from your sink (and you don’t have to install an additional faucet), the Frizzlife MK99 installation can be done in just a few minutes. 

This device is prepared to fit both 1/2″ and 3/8″ cold water lines, which should work for most US kitchen sinks without having to use an adapter.

You can find below a video that shows how to install the Frizzlife MK99 under-sink water filter:

Replacing the filters is also a quick and simple process – you just need to twist the device off, replace the filter cartridge, and twist it on again. You won’t need any tools, and the system comes with an automatic water shut-off to make the process even easier.

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Frizzlife MK99 Under-Sink Water Filter Reviews

On the Frizzlife website, more than 400 gave this product an average rating of 4.9 stars. On Amazon, this product has an average rating of 4.5 stars, with more than 4.000 reviews.

Of these reviews, more than 90% are 4 or 5-star reviews, which shows that the big majority of the customers are happy with the Frizzlife MK99 under-sink water filter and would recommend it to others.

Most of the reviews are extremely positive, but we also noticed that some customers complained about low water pressure.

Frizzlife MK99 Under-Sink Water Filter Alternatives

If the Frizzlife MK99 under-sink water filter system isn’t the ideal solution for your household, there are other alternatives that you can consider.

Waterdrop G3 Reverse Osmosis Under-Sink Water Filter

A great alternative is the Waterdrop G3 Reverse Osmosis Under-Sink Water Filter system.

This is one of the best Reverse Osmosis systems on the market, and it is installed under the sink. This tankless NSF-certified system removes up to 99% of the water contaminants and comes packed with several smart features like a TDS meter or a filter life indicator in-built on a designer faucet.

Note: You can use our code WFPG3 on Waterdrop to save $55

Aquasana AQ-5300 Under-Sink Water Filter

If you prefer a conventional under-sink water filter, the Aquasana AQ-5300 is a good option.

This device comes with several NSF certifications, reduces up to 99% of 77 common water contaminants through a 3-stage filtration process, and provides good water flow, and an easy installation.

CuZn UC-200 Under-Sink Water Filter

Another nice alternative is the CuZn UC-200 under-sink water filter.

This simple under sink water filter has an amazing longevity of 5 years or 50.000 gallons of filtered water, can be installed in 5 minutes, and removes most of the contaminants found in municipal water through a 3-stage filtration system.

Our Verdict

We recommend the Fizzlife MK99 Under-Sink Water Filter system, and we nominated this device as the best value simple under sink water filter choice for the Best Under Sink Water Filters.

This under-sink water filter removes up to 99.9% of 58 common contaminants found in municipal water, is NSF certified, includes a 2-stage filtration process, has a good flow rate, and can be installed in a few minutes.