Title of the SVG icon

SHOP NEW PET STATION DISPENSER

Free Shipping on All Orders

SHOP HOT DEALS - 50% OFF*

Title of the SVG icon
(844) 257-4103
Title of the SVG icon
The Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52 is a white, NSF-certified filter with green and black text for specs and installation. It uses a coconut shell carbon block for superior filtration and is shown on a plain white background.
Image of Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52, featuring a blue NSF Certified badge and text noting its NSF 42-certified coconut shell carbon block for aesthetic benefits and lead content under 0.25% per NSF 372.
A graphic of the Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52 highlights NSF-certified coconut shell carbon block and 97.6% contaminant reduction, with icons for chlorine, bad taste, and odors for clean, fresh-tasting water.
The Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52 features high-grade natural coconut shell carbon, shown in a close-up next to a coconut, for efficient and reliable water filtration.
A woman holds a sleeping baby and drinks water, showcasing 2x Better Adsorption with the Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52’s NSF-certified coconut shell carbon block for healthier hydration and improved filtration.
The Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52 is a white filter with a green label, equipped with an NSF-certified coconut shell carbon block for effective filtration.
A woman drinks from a glass of water filtered by the Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52.
A modern kitchen features a Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52 with an NSF-certified, lead-free coconut shell carbon block filter and dispenser. Icons below show it’s leak-free and tool-free. A close-up reveals the filter inside the fridge.
A screenshot shows a device displaying details about the Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52, an NSF-certified water filter with a coconut shell carbon block.
Pinch image to Zoom
The Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52 is a white, NSF-certified filter with green and black text for specs and installation. It uses a coconut shell carbon block for superior filtration and is shown on a plain white background.
Image of Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52, featuring a blue NSF Certified badge and text noting its NSF 42-certified coconut shell carbon block for aesthetic benefits and lead content under 0.25% per NSF 372.
A graphic of the Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52 highlights NSF-certified coconut shell carbon block and 97.6% contaminant reduction, with icons for chlorine, bad taste, and odors for clean, fresh-tasting water.
The Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52 features high-grade natural coconut shell carbon, shown in a close-up next to a coconut, for efficient and reliable water filtration.
A woman holds a sleeping baby and drinks water, showcasing 2x Better Adsorption with the Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52’s NSF-certified coconut shell carbon block for healthier hydration and improved filtration.
The Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52 is a white filter with a green label, equipped with an NSF-certified coconut shell carbon block for effective filtration.
A woman drinks from a glass of water filtered by the Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52.
A modern kitchen features a Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52 with an NSF-certified, lead-free coconut shell carbon block filter and dispenser. Icons below show it’s leak-free and tool-free. A close-up reveals the filter inside the fridge.
A screenshot shows a device displaying details about the Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52, an NSF-certified water filter with a coconut shell carbon block.

Brio CS521 Refrigerator Filter – 3M™ Cuno CS-52

$9.99
Save 50%
$19.99 MSRP

SKU : RFCS521PK

Free Shipping icon

Free shipping on all orders

- +
Please, select a quantity higher or equal to the minimum order quantity

Free shipping on all orders

  • Powerful filtration: filters eradicate harmful contaminants such as lead, chlorine, mercury, dirt, and other impurities
  • Long-lasting: water will look and taste clean throughout the filter's 6-month lifespan
  • Fresh taste: coconut shell carbon block filter absorbs twice as many impurities than alternatives
  • NSF-certified: awarded by the national sanitation foundation for its ability to remove harmful substances
  • Convenient installation: simple installation does not require any tools or hassle
  • Compatible with: 640565, AP3961137, 1257074, CS-52, CS-452, CS-522, CS-532 CS-562, OCS CS-52 CS-51, CS450, CS-512, OCS CS-51 55866-05, 5586605, 55866-06, 5586606 700200002518, EVOLFLTR10, WHKFR-PLUS, WHKFR Plus, WHKF-R-PLUS, WHCF-R-PLUS, W1085590, 56932, 2168701, 8668597, C00094379, C00097913, D846181, 51000, 52000

Many frequently asked questions can be answered in our help center. Here you can find useful information such as shipping policies, warranty information, product guides and more! Brio Help Center

Your order will be fulfilled during our normal business hours (8 a.m. – 5 p.m. PST). Orders placed over the weekend or on holidays will be fulfilled on the following business day.

However, we cannot guarantee same day fulfillment. In general, orders will be shipped out the next business day after you have completed your order.

You may return any unused or undamaged products within 30 days of the original purchase date to receive a full refund. Once you file a return, we will process your refund within 3 to 5 business days.

When you receive your order please make sure to save your original packaging in the event you need to return the product.

To file a return, please visit our returns page here. Please note that you will be responsible for return shipping costs unless the reason for the return is due to an error on our behalf.

Download user manual
  • Image title

    NSF Certified Performance

    Tested and Certified by NSF International in Model RFCS52 against NSF/ANSI Standard 42 for reduction of the claims specified on the Performance Data Sheet, and to NSF/ANSI 372 (≤0.25% lead).

  • Image title

    Powerful Filtration

    With a pore size of 0.5 microns, filters out contaminants like chlorine and VOCs, as well as unpleasant tastes and odors, leaving water clean, and looking and tasting great.

  • Image title

    Incredibly Fresh Taste

    Made using natural coconut carbon block for thorough contaminant adsorption, keeping your water and ice clean. Safe filtration media imparts no contaminants into filtered water or ice.

  • Image title

    Safe, Healthy Hydration

    With its meticulous filtration, you and your whole family will reliably enjoy water and ice that are clean, healthy, and delicious.

  • Image title

    For 3M™ Cuno & More

    Designed for complete compatibility with your refrigerator, making installation easy and ensuring a tight, leak-proof seal.

  • Image title

    Making the World Better

    One filter can save up to 3,200 plastic bottles over a six month lifespan. That's 6,400 plastic bottles a year you can keep out of oceans and landfills.
Close