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UR90 Under-Sink Water Filter Cartridge, 1,000 Gallon Capacity

Replacement Cartridge for U9000 Under-Sink Filtration System
Extra 15% OFF This Cartridge + 15% OFF Auto-Shipped Cartridges!
One replacement cartridge will be shipped to you at a 15% discount every 12 months. You may adjust your delivery frequency at any time. (Auto-Ship is available to customers in the contiguous US only.)
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Retail $91.99
NOW $69.95
(You save $22.04 )


Retail $91.99
NOW $69.95
(You save $22.04 )


FREE Shipping + 60-Day FREE Returns! (Contiguous US)

UR90 Filter Cartridge Highlights

  • Superior Filtering Performance and Taste
  • Powerful Big Block™ Technology Maximizes Contaminant Reduction
  • Huge 1,000 GALLON Rated Capacity!
  • WQA Gold Seal Certified for 75 Contaminants (Trusted Filtration Performance!)
  • Quick & Easy Filter Cartridge Replacements
  • Made in the USA


WaterChef® Premium Under-Sink Filter Cartridges


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

This unique formula provides unsurpassed contaminant reduction for a broad range of common tap water contaminants including:

  • Lead
  • Mercury
  • Cysts (including Giardia and Cryptosporidium)
  • Chlorine
  • Chloramine
  • Chlorine By-Products (such as Trihalomethanes)
  • Synthetic Contaminants (such as Pesticides and Herbicides)
  • Industrial Contaminants (such as Volatile Organic Compounds (VOCs))
  • Emerging Contaminants (such as Pharmaceuticals and Detergents)
  • Petroleum Contaminants (such as Benzene and MTBE)

Additionally, the UR90's unique media formulation allows 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 other water filtration technologies such as reverse osmosis and distillation).

easy filter changes

With WaterChef 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 filter cartridge replacement per YEAR! (Compare that to the cartridges for pitcher filters, faucet filters and refrigerator filters that are so small that they can require as many as 25 replacements per year!) Plus, fewer cartridges to change means less waste for the environment too!

WQA Gold Seal

The water filtration industry is riddled with unvalidated, exaggerated and misleading performance claims, but you can rest assured knowing that WaterChef has invested in extensive third-party testing and certification by one of the water filtration industry’s leading authorities, the Water Quality Association (WQA).

Requiring the strictest of compliance standards, WQA is valued by consumers, manufacturers, retailers and regulatory agencies worldwide. Trust is what independent NSF/ANSI Certification is all about.



Long Lasting
Big Block™ Filtration
WQA Certified Capacity for a Single Cartridge
Less Than Half
the Cost of Competing Brands

Based on WQA testing data with typical water contitions. Actual performance may vary.

I researched extensively before buying this filter and now I am glad that I did. I have wasted so much money on other filters that broke, needed frequent filter replacement, or out and out didn't do the job. This filter is the best hands down.

I love my filter. The cartridge is easy to install and the water tastes so much better! I love that I can trust it's removing so much from my water without sacrificing the taste. This is a great product that I completely recommend.

Auto-Ship is a great way to receive your replacement filter every year, very convenient. I have owned my system 4 years now, one of the best products I have ever purchased, high quality materials used, we eliminated hundreds to thousands of plastic bottles yearly...



Discover the Difference


  • Superior Contaminant Reduction & 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 Monitoring takes the guesswork out of cartridge replacement.
  • WQA Gold Seal Certified for 75 Contaminants - NSF/ANSI Standards 42, 53 and 401 (Trusted performance.)
  • Unsurpassed Contaminant Reduction for a Wide Range of Common Tap Water Contaminants (including Lead & Mercury)
  • Low Cost per Gallon!
  • Beneficial Minerals (such as calcium, magnesium, and potassium) Pass Through Freely
  • BPA Free
  • Eco-Smart (Enjoy continuously filtered water without the wastewater associated with RO systems.)
  • Easily Installs in Just Minutes (No tools needed!)
  • Includes Battery for Intelligent Monitor™
  • Additional 15% OFF with Auto-Ship! (contiguous U.S.)
  • FREE SHIPPING & RETURNS! (contiguous U.S.)
  • 5-Star Customer Care! (We stand behind our products AND our customers!)



Because the Details Matter

  • WaterChef® UR90

  • Under-Sink

  • WaterChef® U9000 Under-Sink Filtration System

  • Up to 1,000 Gal. or 1 Year per Filter Cartridge

  • WQA Gold Seal Certified – NSF/ANSI Standards 42,53 and 401

  • 75 (including Lead and Mecury)

  • Yes

  • USA

  • 30 psig - 100 psig

  • 34º F - 100º F (1º C - 38º C)

  • Sub-Micron (0.5 micron)

  • 0.75 gal/min @ 60 psi

  • Yes

  • 2032 CR, 3V lithium (inluded)

  • Yes



What Our Customers Are Saying




Have an Additional Question? Just Ask Us.  

WaterChef filtration systems are all about performance, style, and value! Not only do you get a system that looks great, is built to last, and performs to your expectations, but one that is designed to provide up to 1,000 gallons or one year with a single filter cartridge! That means an average houshold will enjoy freshly filtered water for just pennies a day with the convenience of having only one cartridge to replace annually – easy on your wallet and your busy schedule!

The U9000 System has an electronic Intelligent Monitor™ that keeps track of how much water has gone through the filter and will alert you when it is time to change the UR90 cartridge. You will also get a warning before the cartridge is completely used up, giving you time to obtain a new filter cartridge.

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.

In an industry riddled with unvalidated and misleading performance claims, having a trusted, independent “third party” organization like WQA, NSF or IAPMO evaluate a water filtration system against official industry standards (NSF/ANSI Standards) gives you the ability to make an informed choice about the performance claims of a filter system. These Standards have been developed by industry experts, public health officials, and consumer representatives to ensure your safety by validating manufacturer claims.

Some water filter manufacturers base their performance claims on internal test results from their own laboratories, but you would have to know them very well to trust whether the claims they make for their products are true or misleading. Having a trusted testing organization “validate” performance claims gives you the peace of mind you are looking for when it comes to selecting the right system for you and your family.

NO. Beneficial minerals (such as calcium and magnesium) pass freely through the system, leaving you with water that is both great tasting and naturally balanced.

NO. TDS is a poor measure of water quality. 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 specifically designed to reduce a broad range of unwanted contaminants while leaving these beneficial minerals in.

YES. All WaterChef countertop systems have been independently tested and certified by WQA for the reduction of odor, including the rotten egg smell that is often associated with sulfur.

NO. While it does have a limited ability to reduce fluoride, it is very dependent upon the pH of the water. If you have 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 WQA (the Water Quality Association) or NSF for fluoride reduction.

If you have questions or would like assistance, feel free to 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.

YES. While this cartridge 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.

Trusted Water Filtration

Superior quality and performance, backed by independent validation.

  • Tested and Certified
  • Water Quality
  • WQ Member
  • Planet
  • Made In USA
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