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Brondell Circle Reverse Osmosis - Under Counter Water Filter System

14.60 LBS

Product Description

Clean water is the foundation of good health. Circle provides high-quality water with up to 10x less waste, and features a beautiful, space-saving design.

Better filtration with less waste? We’ll drink to that.

Circle delivers clean drinking water by using multi-stage filtration and reverse osmosis technology, filtering water in stages until it’s clean enough to drink. Reduce unwanted contaminants like lead, chlorine, volatile organic compounds, and more, and enjoy higher-quality water without the worry.

Circle features science-based, patented components that allow for less wastewater—up to 10 times less as compared to traditional reverse osmosis water systems. Choose Circle for greater savings and sustainability, cup after cup.

  • patented water-saving technology

  • superior 4-stage filtration

  • certification by the Water Quality Association (WQA)

  • compact, sustainable design

Item #RC


Full Features

Patented water-saving technology
  • up to 10 times more efficient than traditional reverse osmosis filter systems
  • flexible storage tank reduces waste
  • patented Smart Valve helps eliminate wasteful backflow
  • automatic flushing extends the reverse osmosis filter lifespan
Superior 4-stage filtration
  • sediment filter reduces sand, rust, and particulates
  • pre-carbon filter traps VOCs, chlorine, and other contaminants
  • membrane filter reduces heavy metals, cysts, and industrial chemicals
  • post-carbon filter removes lingering contaminants and odors
Water Quality Association certification
  • certified by the WQA to reduce and remove contaminants
  • highly-regarded gold standard for residential water quality
  • tested and certified under NSF/ANSI Standards 42, 53, 58, and 372 to remove common contaminants found in tap water*
Space-saving, sustainable design
  • beautifully designed for a sleek, clutter-free appearance
  • filters and storage tank are housed within a single case
  • small footprint, installs under counter
  • includes chrome faucet with LED indicator
  • operates without electricity
  • filter changes are simple and infrequent; 6 and 24 months



A more efficient system for sustainably filtered water.

Circle’s sleek, high-capacity design includes patented, water-saving technology that makes it up to 10x more efficient than conventional reverse osmosis (RO) systems. Over the life of the product, Circle pays for itself in water savings compared to traditional RO.

A unique, flexible reservoir and patented Smart Valve reduce wastewater output by helping to eliminate back pressure—the biggest source of waste in RO systems.

Circle’s surprisingly small footprint leaves storage space available under your counter. Easy to install and maintain, it's an elegant and efficient reverse osmosis system for the modern, sustainable home.

Circle reduces these contaminants—and more.

Aesthetic chlorine, atrazine, barium, benzene, cadmium, chlorobenzene, copper, cysts, DCPB, endrin, fluoride, hexavalent & trivalent chromium, lead, methoxychlor, pentavalent arsenic, radium, trihalomethanes, and 2,4-D.

A smarter, space-saving design.

With a design that’s as attractive as it is sustainable, Circle features a rapid refill rate that allows it to fill in about half the time of traditional RO systems. Its reservoir is contained within a beautifully designed, single case that tucks below your sink—so all you’ll see is the designer faucet with LED filter-change indicator next to your tap.

Planet-friendly performance.

Most RO systems operate at a low level of efficiency, producing up to 24 gallons of wastewater for every gallon of filtered water produced. Why? When a glass of water is drawn, the system will then try to “top off” the reservoir. Because significant back pressure has built up in the almost-full reservoir, it’s difficult for new water to enter. Instead, gallons of water are pushed back down the drain before a single gallon is produced for drinking. Thanks to Circle’s patented components and innovative design, this back pressure is no longer an issue—making the Circle up to 10x more efficient over traditional RO systems.

The Circle’s refill rate is more than twice as fast as other non-electric systems, and equally as fast as those utilizing electric pumps. With long-lasting filter lifespans and easy “twist-and-seal” filter changes, Circle delivers water savings, electricity savings, and space savings—in a beautiful, simplified design.

Four-stage filtration.

The Circle utilizes 4 separate advanced filters, reducing industrial chemicals, heavy metals, VOCs, dissolved solids, bad tastes, odors, and more. See Performance Data Sheet for full list of contaminants reduced.

Certified by the Water Quality Association

Brondell water filtration systems are tested and certified by the Water Quality Association (WQA), ensuring that you can trust in performance claims. The Circle is tested and certified to NSF/ANSI 42, 53, 58, and 372.


Not up to installing it yourself?

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Shipping $ Return

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.

NOTE: All Bidet sales are final. If you install and/or use the bidet we cannot take it back due to Federal Health Regulations, we can only repair it or exchange it for exactly the same model if defective.


We can ship to virtually any address in the US and Canada. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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Product Videos

Brondell Circle Reverse Osmosis (RC100) Installation Guide 05:02

https://www.brondell.com/water-filtration/circle-reverse-osmosis-water-filtration-system/ Brondell's Circle Reverse Osmosis Water Filtration System utilizes patented new technology to make it up to 10 times more efficient than current conventional RO systems. Additionally, the Circle RO Water Filter eliminates any need for electricity by integrating the tank and filters. This all-in-one configuration makes the Circle easy to install and maintain. Reverse osmosis (RO) systems today are bulky, difficult to install, and many require electricity and pumps to operate. Most importantly, conventional RO systems are extremely inefficient, wasting up to 24 gallons of water for every gallon of drinkable water!

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