The Circle filters are separated into two replacement filter cycles: the three-filter pack (RF-20) needs to be changed every six months while the RO Membrane filter (RF-40) only needs to be changed every 2 years. Included wi...

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The Circle filters are separated into two replacement filter cycles: the three-filter pack (RF-20) needs to be changed every six months while the RO Membrane filter (RF-40) only needs to be changed every 2 years. Included with every three-filter pack is a new replacement battery to reset the faucet LED filter change indicator.

Stage 1: SEDIMENT FILTER (RF-20): The Sediment filter reduces particulate materials such as sand, rust and fine particles from the water supply. The first stage also acts as a pre-filter protecting and extending the life of the following filters. Recommended replacement every 6 months

Stage 2: PRE-CARBON PLUS FILTER (RF-20): This second stage filter significantly reduces harmful VOCs, chlorine and soluble contaminants which can damage the RO Membrane filter. Recommended replacement every 6 months.

Stage 3: RO MEMBRANE FILTER (RF-40): The RO Membrane filter works by pushing water through a semi-permeable membrane thereby separating H2O molecules from contaminants in the tap water. The powerful RO Membrane filter significantly reduces pollutants such as: heavy metals, cysts, fluoride, arsenic, industrial chemicals and more. Recommended replacement every 24 months and sold separately.

Stage 4: POST CARBON BLOCK FILTER (RF-20): As the final stage in the filtration process, the Post Carbon Block filter further reduces any lingering water contaminants such as chlorine and volatile organic compounds (VOCs), improving the overall taste and odor of the dispensed water. Recommended replacement every 6 months.

Brondell water filtration systems are all tested and certified by the Water Quality Association (WQA). Beware of cheap imports and non-certified manufacturer's filtration claims that have not been tested and approved by an authorized agency for water filtration products



  • REPLACEMENT WATER FILTER: This sediment and carbon block filter replacement is specifically for the Brondell Circle Under Sink Water Filter (sold separately); It is designed for easy installation, providing great-tasting water for up to 6 Months
  • AN EXTRA BOOST FROM CARBON: The carbon-based block filtration reduces cloudiness and helps trap unwanted components; Reverse osmosis membrane technology combines with 3-stage carbon filtration to filter water that’s not just safer, but tastier, too
  • CLEAR BENEFITS: The sediment filter reduces rust, sand, and particulates; A carbon block pre-filter reduces VOCs, chlorine, and soluble contaminants; The carbon post-filter further reduces VOCs & lingering contaminants, along with chlorine taste & smell
  • SIMPLE DIY INSTALLATION: The replacement filter can be installed in just a few minutes with a quick and easy twist and seal installation; The change indicator lets you know when a new filter is needed; Includes filter indicator replacement battery
  • We design hygiene products that help protect our planet’s essential resources. From water-saving showers and air purifiers to bidets that help reduce toilet paper and energy use, we’re helping you live more sustainably and it feels better already.
  • REPLACEMENT WATER FILTER: This sediment and carbon block filter replacement is specifically for the Brondell Circle Under Sink Water Filter (sold separately); It is designed for easy installation, providing great-tasting water for up to 6 Months
  • AN EXTRA BOOST FROM CARBON: The carbon-based block filtration reduces cloudiness and helps trap unwanted components; Reverse osmosis membrane technology combines with 3-stage carbon filtration to filter water that’s not just safer, but tastier, too
  • CLEAR BENEFITS: The sediment filter reduces rust, sand, and particulates; A carbon block pre-filter reduces VOCs, chlorine, and soluble contaminants; The carbon post-filter further reduces VOCs & lingering contaminants, along with chlorine taste & smell
  • SIMPLE DIY INSTALLATION: The replacement filter can be installed in just a few minutes with a quick and easy twist and seal installation; The change indicator lets you know when a new filter is needed; Includes filter indicator replacement battery
  • We design hygiene products that help protect our planet’s essential resources. From water-saving showers and air purifiers to bidets that help reduce toilet paper and energy use, we’re helping you live more sustainably and it feels better already.

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