Pros / This water filter is covered under a lifetime warranty.

Cons / This WaterChef system does not remove mercury, bacteria or asbestos from your drinking water.

 Verdict / The WaterChef U9000 is one of the best water filters available and offers many standout features that you will not find in most similar systems.

The WaterChef U9000 is a powerful under-the-sink water filter and is the recipient of our Top Ten Reviews Silver Award. This model can filter more than 50 contaminants that may be lurking in your drinking water and adds back in essential minerals. It features one filter that has a 12-month lifespan, and the entire system is covered under a lifetime warranty. Furthermore, this water filtration system is compact and comes with an included faucet.

WaterChef U9000 Visit Site
  • Number of Contaminants Reduced
  • Number of Stages
  • Replacement Frequency
  • Number of Faucet Options
  • Warranty
  1. An approximate number of contaminants the system will reduce in your water.
  2. 2  WaterChef U9000
    50.0 Contaminants
  3. 66.0 Contaminants
  4. 40.0 Contaminants
  5. Category Average
    40.78 Contaminants

Contaminants Filtered

This water filtration system will reduce more than 50 common contaminants found in tap water. It can remove chlorine, lead, cysts such as giardia and cryptosporidium, pesticides and herbicides, as well as industrial compounds such as volatile organic compounds (VOCs). However, even though this system can reduce a large number of contaminants, it doesn’t have the capabilities to reduce mercury, bacteria or asbestos from your water, which we are disappointed to see as similar systems, like the Aquasana 3-Stage Under Counter, have these capabilities.

One advantage to this water filter is that even though numerous contaminants are taken out of the water, several beneficial elements are put back in. This water filter unit puts back essential minerals such as calcium and magnesium, which improves the taste of your water.

Performance Features

The WaterChef U9000 offers several standout features, including its Big Block Filtration technology. This system uses a solid carbon block cartridge that is effective in removing contaminants from tap water. This under-the-counter system only uses one cartridge and does not filter out contaminants in stages, as many similar products do.

One advantage of only using one cartridge to clean your water is you don’t have to replace numerous cartridges every few months, saving you both time and money. This system’s cartridge can filter up to 1,000 gallons of water, which means it will last about 12 months before it needs to be replaced. This is much longer than the filters on many similar systems that should be replaced every 300 to 500 gallons, or every six months. This unit comes with a notification system that will tell you when the cartridge is ready to be replaced.

An optional filter system for your refrigerator is available with this system. A refrigerator filter can connect to the U9000 and provide filtered water for your refrigerator without purchasing a separate unit. However, the refrigerator kit is an additional charge.


The design of the WaterChef U9000 is aesthetically appealing, especially when compared to similar under-the-counter water filters. It is made of stainless steel, and it includes a designer faucet. There are four designer faucet options to choose from, which means you can pick the style that best matches your kitchen. Many similar models offer just one standard faucet.

This water filter system will not take up a large amount of space underneath your counter. It is only 9 inches tall, 8 inches deep and 6 inches wide. It weighs 9.5 pounds. It also comes with detailed instructions on how to install the system under your counter. If installation appears to difficult, you can opt to hire a professional plumber to assist you.

Help & Support

The WaterChef U9000 is covered under a lifetime warranty. This is the best warranty we saw available on this type of system. Many similar products are only covered under a one-year warranty. Furthermore, WaterChef offers a 60-day money-back guarantee if you are not satisfied with the system.

If you need to talk to representatives from WaterChef, you can reach them via email and telephone. Our interactions with representatives were excellent. We sent an email inquiry to the company filled with questions, and within hours we received a response with detailed answers. However, there is no live chat support available from this company.


The WaterChef U9000 is easily one of the best water filtration systems available. It can reduce a number of contaminants from your water, and it adds back in essential elements. Plus, it uses just one cartridge that has a 12-month lifespan. Furthermore, it is covered under a lifetime warranty and it has an attractive design The WaterChef U9000 is a powerful water filter system that provides several standout feature that you will not find in many similar under-the-counter filters.

WaterChef U9000 Visit Site

Specifications and Benchmarks


Easy-to-change Filters
DIY Installation
Replacement Notifications
Number of Faucet Options
Width (inches)
Depth (inches)
Height (inches)
Pounds (pounds)

Contaminants Filtered

Number of Contaminants Reduced

Performance Features

Maximum Feed Water Pressure (psi)
Flow Rate (gallons per minute)
Number of Stages
Replacement Frequency (months)
Replacement Frequency (gallons)
NSF Certification

Help & Support

Live Chat