Frizzlife SK99 3-Stage Under Sink Water Filter Reviews

The SK99 is yet another under sink water filter model from Frizzlife that stands out on our list when it comes to filtering contaminants in municipal water. It’s a quality unit offering superb functionality and filtration ability that guarantees great results.

Filtration Performance

The Frizzlife SK99 is equipped with 3 stages of filtration comprising of a sediment filter and two carbon filters that provide high precision filtration of harmful contaminants. 

Stage 1 of the system is a pleated PP sediment filter cartridge and it delivers much better performance than conventional filter cartridges in removing sediments and particles from the water.

It has multiple layers on its surface that facilitate greater surface area and with 5-10 filtration precision, it will eliminate tiny to large particles present in the water including sand, silt, dirt and rust thereby ensuring better protection for the later 2 stages.

Stage 2 is made up of a carbon filter cartridge which serves as the initial filtration stage for most of the chemical contaminants. With a 3 to 5-micron precision, this filter performs well to significantly reduce the amount of chlorine, chloramine and other chemicals in the water.

It also removes volatile organic compounds (VOCs) as well as residual particles that may have made past the sediment filter.

At the final stage is the Frizzlife top-grade carbon block filter cartridge providing up to 0.5-micron filtration precision which is almost 10 times higher than many other brands as most of them with similar filters often have an average precision of 3 microns.

This remarkable contaminant removal performance allows the filter to clear out over 99.99% of lead, chlorine and the remaining VOCs and chloramine.

The filter will also remove fluoride, cysts and other heavy metals like arsenic, mercury, and cadmium thereby producing cleaner water with no unpleasant odor, taste or color.

Same to the Frizzlife MK99 model, the filtration process of this SK99 system does not touch the essential minerals. Calcium, potassium, magnesium, sodium, and phosphorus are some of the health-benefiting minerals it leaves behind which means the water that comes out is both clean and healthy with a fresh, natural taste.

Capacity and Efficiency

According to Frizzlife, they have not provided the exact capacity for this model because of the variation in the level of usage and quality of water amongst different users.

Nonetheless, you can expect to get a decent capacity plus the flow rate is fairly high. It’s rated to produce 1.7 gallons per minute but it can go up to 2 GPM at 60 psi feed water pressure and there’s zero water wastage, so it’s highly efficient too.

Installation and Maintenance

Even if you are completely inexperienced, installing the SK99 will pose no challenge whatsoever. It’s a DIY installation system that requires just following the straightforward instructions provided to set it up within a few minutes and it connects to the existing faucet.

It will fit both the 3/8” and ½” water line.  A housing wrench and everything you need to install it is provided as well as two extra 3/8” to ½” converters. Furthermore, the system utilizes the twist-in filter design which allows you to change filter cartridges effortlessly.

Only the inside filter cartridges are replaced, not the filter housing which is a notable feature of most of Frizzlife under sink water filters and it means you will benefit from lower costs with regards to filter replacement.  

The service life of the sediment filter is 6 to 12 months while that of the 2nd stage carbon filter is 8 to 12 months. For the last carbon filter, you will need to change it every 12 to 18 months.

Compared to many 3-stage under sink water filters out there, the exceptional performance and overall quality of this Frizzlife SK99 unit undoubtedly make it one of the best models. It’s a unit you can rely on to give you clean drinking water without any fuss.


  • Effective 3-stage filtration process removes a lot of contaminants
  • Essential minerals are left behind during filtration
  • Can produce up to 2 gallons of filtered water per minute
  • Simple DIY installation and filter cartridge replacement
  • Compatible with 3/8” or ½” cold water line


  • Not suitable for filtering well water
  • The exact filtration capacity is not indicated

Product Overview

ProductFrizzlife SK99 3-Stage Under Sink Water Filter Reviews
Rating4.8 out of 5 stars (4.8 / 5) (More than 44 reviews)
Recommended price169.99 USD (Check the latest price at

Product Specification

FeaturesTwist and lock housing filters design
FiltersFRIZZLIFE M3004 Replacement Filter
Flow rate2 GPM
Filter changing indicatorN/A
Dimensions16 x 15.8 x 6.5 inches
Weight7.75 pounds

Images Gallery

Frizzlife SK99 3-Stage Under Sink Water Filter Reviews
Frizzlife SK99 3-Stage Under Sink Water Filter finest filter
Frizzlife SK99 3-Stage Under Sink Water Filter eco friendly
Frizzlife SK99 3-Stage Under Sink Water Filter dimensions
Frizzlife SK99 3-Stage Under Sink Water Filter stages and filters

Quick Navigation

Product Overview | Specifications | Description | Installation | Product Photos | Related Products