null Skip to main content

Escape allergy season at 60% off.Brondell Pro Air Purifier at $299.

See terms

New to Brondell?Sign up for 10% Off

See terms

Circle Reverse Osmosis Filter
Sediment and Carbon Block Filter Replacement Pack

In addition to its reverse osmosis membrane filter, the Circle utilizes carbon filtration to reduce contaminants found in drinking water. Replacing these filters every 6 months helps ensure your water stays as clean as it should.

Excluded from Sale or Coupon Offers


  • In stock & ready to ship

Adding to cart… The item has been added

Reverse osmosis filtration gets an extra boost from carbon.

Reverse osmosis membrane technology combines with 3-stage carbon filtration to deliver drinking water that’s not just safer, but tastier, too. This filter replacement set is designed for use with the Circle Reverse Osmosis Under Sink Water Filtration System, which features Gold Seal Certification by the Water Quality Association (WQA) for reduction of 64 contaminants, including lead, chlorine, chloramines, industrial chemicals, cysts, and more. To keep your system running at its best, replace your carbon filter set every 6 months. Your purchase also includes a battery replacement for your faucet’s filter change indicator.

  • holds WQA certification when used with the Circle RO System

  • powerful activated carbon and carbon block filtration

  • designed for easy installation

Item #RF-20

Full Features

Water Quality Association certification
  • holds WQA certification for reduction of 64 contaminants when used with the Circle Reverse Osmosis Under Sink Water Filtration System
  • certified under NSF/ANSI standards 42, 53, 58, and 372*
  • reduces VOCs, particulates, and chlorine
  • see Performance Data Sheet for full list of contaminants reduced
Crystal clear benefits
  • activated carbon block filter replacement set
  • sediment filter reduces rust, sand, and particulates
  • carbon block pre-filter reduces VOCs, chlorine, and soluble contaminants
  • carbon post-filter further reduces VOCs and lingering contaminants, along with chlorine taste and odor
Designed for easy installation
  • easy “twist-and-seal” filter changes
  • includes filter indicator replacement battery
  • replace every 6 months
Sediment, Pre-Carbon, and Post-Carbon Block Filter: 11”(H) x 2.5”(Dia)
Sediment, Pre-Carbon, and Post-Carbon Block Filter: .40 lbs
Filter Life
6 months
Model Number/SKU
Certifications & Notices
  • WQA

* See performance data sheet for more details. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.