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WaterChef U9000 Premium Under-Sink Water Filtration System

  • WaterChef under-sink water filtration system
  • premium quality designer faucet
  • nsf certified water filter
  • under sink water filter installation
  • WaterChef premium single-temp water faucets for under-sink water filter
  • under-sink water filter cartridge UR90

Your Ultimate Drinking Water Solution!

The WaterChef® U9000 Premium Under-Sink Water Filtration System provides the ultimate in performance, durability and convenience in a stylish and compact, stainless steel system!

Product Highlights

  • Superior Contaminant Reduction (including >99% of Lead!)
  • 1,000 GALLON Capacity! (Filter More. Spend Less.)
  • Intelligent Monitor™ (No More Cartridge Guesswork!)
  • Tested & Certified by NSF® International (Trusted Performance)
  • Stainless Steel System with Premium Designer Series Faucet
  • LIFETIME Limited Warranty! (Built to Last)
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I give this product and the company FIVE STARS. I wish every organization I did business with was as helpful and friendly to deal with...When you look at other products on the market, many of them require frequent cartridge replacement which is great for those manufacturers, but not so convenient or cost effective for the consumer. Scott, WaterChef Customer

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WaterChef® Premium Under-Sink Water Filtration

Enjoy Premium Quality Water for a Fraction of the Cost.

Your Ultimate Drinking Water Solution!

Powerful Big Block™ Carbon Filtration – 1,000 GALLONS per Cartridge!

Combining the power of solid carbon block filtration with a unique, proprietary blend of additional filter medias, WaterChef’s exclusive Big Block™ Filtration technology maximizes contaminant reduction and delivers up to 1,000 GALLONS (3,785 L) of freshly filtered water with a single cartridge!

This unique formula provides unsurpassed contaminant reduction for a broad range of common tap water contaminants including: Lead, Chlorine, Chloramine, Cysts (including Giardia and Cryptosporidium), Chlorine By-Products (such as Trihalomethanes), Synthetic Contaminants (such as Pesticides and Herbicides), Industrial Contaminants (such as Volatile Organic Compounds (VOCs)) and Petroleum Contaminants (such as Benzene and MTBE), while allowing beneficial minerals (such as Calcium, Magnesium and Potassium) to remain in the water.

The result is great tasting water that is cleaner, healthier AND naturally balanced (without the de-mineralization and "flat" taste associated with filtration technologies such as Reverse Osmosis and Distillation).

View U9000 Data Sheet PDFWATERCHEF U9000 PERFORMANCE DATA SHEET for the complete list of NSF® Certified contaminant and substance reduction capabilities.

Greater Savings and Convenience. Less Waste.

Stop being nickel and dimed to death by small, costly and less effective filter replacement cartridges. With a WaterChef filtration system, you’ll enjoy premium quality water at a fraction of the cost. You’ll also enjoy the convenience of a 1,000 GALLON rated cartridge capacity (That’s over 7,500 plastic water bottles!). For most households, that translates into just ONE cartridge replacement per year! (Compare that to pitcher filters, faucet filters and refrigerator filters that are so small that they can require as many as 25 replacements per year!) And, fewer cartridges to change means less waste for the environment too!

Intelligent Monitor™ – No More Cartridge Replacement Guesswork!

U9000 monitored filter faucet led indicatorsIntelligent Monitoring takes the guesswork out of cartridge replacement. Unlike other systems with simple timer-based monitors, WaterChef's Intelligent Monitor measures actual usage, so you will never discard a cartridge prematurely or continue using one that has exceeded its rated capacity!

For added convenience, the Intelligent Monitor's LED indicators are built right into the system's premium designer faucet –
GREEN: normal system operation 
YELLOW: under 10% of capacity remains (time to order a replacement cartridge) 
RED: capacity has been reached (replace cartridge to insure peak performance)

Includes Premium Grade Designer Faucet with Built-in LED Indicators

WaterChef under-sink water filter U9000 - includes premium monitored faucetWaterChef’s Designer Series Faucet is a premium grade, single-temperature faucet that features solid forged brass construction (NSF Standard 61 compliant), a ceramic disc valve for reliability, a spout with aerator tip for a steady stream and the convenience of LED indicators (for the Intelligent Monitor) built right into the faucet base ring.

This faucet compliments today’s high-end kitchens with its versatile design and choice of four premium finishes. Choose from polished chrome, polished brass, brushed nickel and oil-rubbed bronze finishes.

Filter Your Sink AND Your Refrigerator with a Refrigerator Kit (optional)

Say goodbye to the inconvenience and expense of the frequent cartridge replacements required by small (and less effective) refrigerator filters. By adding an optional Refrigerator Kit (sold separately) to your U9000 Under-Sink Filtration System, you can easily supply premium filtered water to both your sink and your refrigerator with a single filter cartridge for up to one year!

Tested & Certified by NSF® International for Performance You Can Trust

nsf-logo-bug.gifIn an industry riddled with inaccurate and misleading performance claims, the NSF mark provides you with the security and peace of mind of knowing WaterChef premium under-sink filtration systems have been independently Tested and Certified by NSF International, the water filtration industry's leading authority.

Since 1944, NSF has been committed to making the world a safer place for consumers through its comprehensive certification programs and written standards for food, water and consumer goods. No other independent testing program requires the strict compliance standards imposed by NSF. Credibility is what NSF Certification is all aboutLive Safer® with NSF.

LIFETIME Limited Warranty! – Quality You Can Depend On

WaterChef under-sink filter systems include Lifetime WarrantyWaterChef Premium Under-Sink Filtration Systems are quality crafted from the finest, most durable materials available and are backed by our full LIFETIME Limited Warranty, one of the longest, most comprehensive warranties in the industry!

Discover the Difference...Discover WaterChef!

WaterChef® Premium Under-Sink Water Filtration


  • Superior Performance & Taste
  • Powerful Big Block™ Filtration Technology (Filter More. Spend Less!)
  • 1,000 GALLON Rated Capacity! (For most households, that's just ONE CARTRIDGE per YEAR!)
  • Intelligent Monitor™ (Measures system usage to eliminate cartridge replacement guesswork!)
  • Tested & Certified by NSF® (Quality & performance you can TRUST.)
  • Unsurpassed Contaminant Reduction for a Broad Range of Common Tap Water Contaminants (including Lead)
  • Proprietary 3-Ply Pleated Pre-Filter for Increased Dirt Holding Capacity and Longer Cartridge Life
  • Beneficial Minerals (such as calcium, magnesium and potassium) Remain for Great Tasting, Naturally Balanced Water
  • Low Cost per Gallon!
  • Surgical Stainless Steel Filter Housing (Beauty & Durability!)
  • Premium Designer Faucet with Brass Construction and Ceramic Disc Valve (NSF Standard 61 compliant)
  • Quick Connect Fittings
  • Enjoy Freshly Filtered Water from Both Your Faucet AND Refrigerator with Optional Refrigerator Kit (#0071)
  • BPA Free
  • Eco-Smart (Enjoy continuous filtered water without the wastewater associated with RO systems.)
  • Includes Pre-Installed Filter Cartridge
  • Includes Battery for Intelligent Monitor™
  • LIFETIME Limited Warranty! (This under-sink filter system is built to last!)
  • 60-Day, NO-RISK, Money-Back Guarantee! (RETURN SHIPPING is absolutely FREE in the contiguous U.S.)
  • FREE SHIPPING! (contiguous U.S.)
  • 5-Star Customer Care! (We stand behind our products AND our customers!)

WaterChef® U9000 Premium Under-Sink Water Filtration System


Model WaterChef® U9000
Installation Type Under-Sink
Rated Capacity 1,000 GALLONS (3,785 L)
Intelligent Monitor™ Display Electronic LED Indicators
Rated Service Flow 0.75 gal/min @ 60 psi
Housing & Lid Assembly Construction Surgical Stainless Steel
Designer Faucet Construction Brass with Ceramic Disc Valve (NSF Standard 61 compliant)
Maximum Working Pressure 125 psig (861.8 kPa)
Minimum Working Pressure 30 psig (206.8 kPa)
Maximum Operating Temp. 100º F (38º C)
Minimum Operating Temp. 34º F (1º C)
Particle Retention Size Sub-Micron (0.5 micron)
Tested & Certified by NSF International YES
NSF® Certifications NSF/ANSI Standards 42 & 53 (view Performance Data Sheet)
Battery Included with System YES (also included with replacement filter cartridges)
Filter Cartridge Included with System YES
Replacement Filter Cartridge UR90
Available Designer Faucet Finishes Polished Chrome, Brushed Nickel, Oil-Rubbed Bronze, Polished Brass
Housing Assembly Dimensions 9.25" H x 6" W x 8" D
Faucet Dimensions 11.25" H x 2.75" W x 6.25" D
Designed USA
Assembled USA
California Dept. of Health Certification No. 14-3006
Warranty Description LIFETIME Limited Warranty!
Satisfaction Guarantee 60-Day, No-Risk Guarantee

WaterChef® Premium Under-Sink Water Filtration

Frequently Asked Questions

Q: How often do the filter cartridges in the WaterChef U9000 System need to be changed?

A: WaterChef filtration products are all about performance, style and value! Not only do you get a system that looks great and performs to your expectations, but one that is also designed to provide up to 1,000 Gallons with a single filter cartridge! That means an average family of four can enjoy freshly filtered water for just pennies a day and the convenience of one cartridge replacement per year – great for your wallet and your busy schedule! Of course, if you have more thirsty people in your family or just simply enjoy a lot of water, you can replace the filter more often.

Q: How will I know when it is time to replace my filter cartridge?

A: The U9000 system has an electronic Intelligent Monitor that tracks how much water has gone through the filter, so it will let you know when to change it. And, it will also give you a warning before the cartridge is completely used up so you will have time to obtain a new filter cartridge.

Q: Why do the filter cartridges need to be changed?

A: WaterChef filter systems have been certified to reduce the contaminants claimed on the performance data sheet. Every filter has a limited amount of capacity for the contaminants it captures. Even though water is still flowing through it and may still taste fresh, there comes a point when it is no longer providing the performance it had when new. Therefore, it is important to change the filter on time to get the best performance from it. There is nothing wrong with changing it ahead of time if you notice a return of off taste or odor similar to the tap water. A sudden or temporary change may be normal with seasonal factors or activities of the municipal water provider.

Q: Why is independent certification of water filtration products important?

A: Simply put, having a trusted, independent “third party” organization like NSF International, WQA, or UL evaluate a water filtration product against an official standard or protocol that has been developed by industry experts, public health officials, and users and consumer representatives, gives you the best means for making a sound and informed choice about the claims of the product. Some water filtration manufacturers have nicely outfitted laboratories with talented scientists to develop great products, but you would have to know them very well and how they stand by their core values to trust whether the performance claims they make for their products are true or misleading. Having a trusted organization “validate” their claims will give you the peace of mind you are looking for when it comes to selecting a system for you and your family.

Q: Does this system remove beneficial minerals from the water?

A: No. Beneficial minerals such as calcium and magnesium pass freely through the system, resulting in water that is both great tasting and naturally balanced.

Q: Does this system reduce Total Dissolved Solids (TDS) from the water?

A: No. TDS in drinking water is usually attributed to the amount of calcium, potassium and magnesium that is present in your water supply. These are beneficial minerals that are known to support good health. WaterChef systems have been designed to reduce unwanted contaminants, while leaving the beneficial minerals in.

Q: Does this system reduce sulfur odor (rotten egg smell) in my water?

A: Yes. WaterChef drinking water systems have been independently tested and certified by NSF for the reduction of odor, including the rotten egg smell that is often associated with sulfur.

Q: Does this system remove fluoride from the water?

A: No. While it does have a limited ability to reduce fluoride, it is very dependent upon the pH of the water. If you've had your water tested and find that fluoride is a major concern for you, we recommend finding a reputable manufacturer for either a reverse osmosis or distillation system. Be sure that the system has been independently tested and certified by either NSF® or the Water Quality Association (WQA) for fluoride reduction. If you have questions, or would like assistance, please call WaterChef Customer Care at 1-800-879-8909. One of our support specialists can help you find a reputable manufacturer that fits your specific needs.

Q: Can the water from the WaterChef U9000 System be dispensed from my refrigerator?

A: Yes. By adding the optional Refrigeration Kit (which includes tubing and fittings), a single U9000 System can be used to dispense filter water from both your faucet and your refrigerator, eliminating the added hassle and expense of replacing refrigerator filters.

Q: Can the WaterChef U9000 System be used with an instant hot water appliance for "hot" filtered water?

A: Yes, under certain conditions. When the U9000 System is used in conjunction with an instant hot water appliance, a dual temperature (vented) faucet is required. A single temperature faucet (included with the U9000 System) is only intended for use with cold (ambient) water supplies. If you are interested in using this system with an instant hot water appliance, please call Customer Care at 1-800-879-8909 for additional information.

Q: Can this system be used to filter well water?

A: Yes. While this system has been specifically designed to reduce contaminants that are most commonly found in municipally treated water supplies, it also has the ability to work well on most disinfected wells. Prior to making the decision to purchase any home water treatment system, it is advisable to have your well water tested first. Once you have your test report, call WaterChef Customer Care at 1-800-879-8909 and request to have one of our water quality specialists review the specific substances and contaminants shown on your report. This will help us to determine whether this system is the right solution for you.

Product Reviews

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  1. I just love my U9000!!!!

    Posted by Unknown on 15th Apr 2016

    This is truly an amazing system! We've had this system for years and never experienced an issue. On top of that, the customer service is amazing!!! BRAVO!

  2. dependable

    Posted by Wade Walker on 10th Feb 2016

    I installed this system two years ago. I changed out the filter about 5 months ago. It was an easy install / filter change and the water has been pure and clear so far as my taste can tell. Wonderful product

  3. Ultimate Performer, Delicious Water

    Posted by Clean Water In Ohio on 28th Jan 2016

    The Water Chef U9000 is a premium stainless steel unit designed to last a lifetime. I also installed the refrigerator line to a Samsung ice maker. Now I have clean, great tasting water at the sink and in the ice tray.

    We've been using the Water Chef U9000 for one week. It's a pleasure to have great tasting water, coffee, tea and ice! Even our cat approves. He's been drinking a lot more water lately.

    Customer service is also rated 5 stars. I've never experienced a customer service team as dedicated to immediate customer satisfaction. Thank you customer service team!

  4. Excellent water, frustrating company.

    Posted by Dan Sutherland on 5th Oct 2015

    My water filter gives great water, no question. I'm very frustrated with the company though because my flow meter stopped working over 4 months ago and they still haven't sent me a new one. They keep tell me the new one is almost ready. If they sent me the old style to hold me over while the new one was being finished that would've been better customer relations.


    Thank you for your feedback! We apologize that we were unable to satisfy you when you contacted us. Our new and improved Intelligent Monitors have been available for several months now and we would love the opportunity to expedite one to you. Please contact us directly so that we may take care of this for you.

  5. Unmatched quality, reliability, and performance.

    Posted by Marcia Howey on 7th Sep 2015

    I struggled for years with countertop , faucet, and pitcher filters. While these items may seem cheap, replacing filters frequently is costly. The Undercounter Water Chef is worth every penny and the filter price is reasonable. It is a luxury experience for me to just turn on the tap for clear, pure, water that tastes great. i wish I had found the WaterChef much sooner.

  6. You won't find a better unit anywhere

    Posted by John Catania on 12th Jun 2015

    First I want to say the service from WaterChef is great staff is always there to help. Shipping is very fast.
    The u9000 filtration unit is top quality and the water speaks for itself. Water is better than any jug water i have had clear and crisp. Unit needs only a 6 inch space under the sink and installs in less than 30 min. You must buy a 5/8 diamond drill bit if you have marble or granite counter top. You can drill in less than 3min. This ends buying 5 gal jugs for me. Thank you WaterChef.

  7. No More Lugging 5 Gallon Bottles

    Posted by kulpots on 11th Mar 2014

    I just installed my new system and it seems to work perfectly! I'm a 63 year old woman and I did it myself. Nothing leaks and it looks fantastic in that it matches my existing faucets and it looks to be very high quality. Over the years I've spent a small fortune on getting water delivered in 5 gallon bottles which still required me lugging them into the house and storing them for a month. This system will pay for itself in a year. I couldn't be more pleased!

  8. Feels Clean to Me

    Posted by Luis on 6th Mar 2014

    Love the WaterChef. Very simple to assemble and very tasty.

  9. I wish I purchased Water Chef earlier!

    Posted by Krystyna on 28th Feb 2014

    We purchased the under sink filtration system over a year ago. After some research we decided we were looking for filtration system that has been approved in USA as well as in Europe since UE has higher standards. That's why we decided to buy Water Chef. We have been very happy. The set came very carefully packed , with very good instructions. My husband installed all. The biggest challenge was drilling a hole in the sink, but after purchasing for couple dollars proper end to our drill all went smooth. The water tastes great, we use it for cooking as well.

    We let our friends taste the difference, we offer glass of tap water and a glass of filtered by Water Chef. The difference in taste and smell is obvious. Couple of our friends purchased the same system since.

  10. Very easy install

    Posted by Emmett on 16th Jan 2014

    I want to compliment you on the very easy install of your U9000. It took me about 15 min. The instructions were very easy to understand, and went very smooth. If I had more room underneath my counter would have been faster, but the stop was hard due too lack of room, very close working, otherwise very easy.

Previous | Showing reviews 11-20 of 33 | Next

The WaterChef U9000 Premium Under-Sink Water Filtration System is
rated 4.8/5 based on 33 reviews

The unit itself is very well made and the faucet looks so nice on the sink. We started using this product the night we got it and the water is so pure and clean coming out which makes the taste of the water amazing. I would absolutely recommend this product to anyone. Bridget C., WaterChef Customer


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