Brondell H2O+ Water Filters: Circle Reverse Osmosis and Cypress Water Filter
Brondell (San Francisco, California) is primarily known for its Swash bidet seat line but has built a substantial water filtration product line including the H2O+ Circle RO (tankless, 4-stage, $300--$400), the H2O+ Cypress Carbon Filter ($150--$250), and the H2O+ Coral 3-stage under-sink filter ($120--$180). Brondell's water filter line reflects the brand's focus on space efficiency and modern design -- the Circle RO is one of the slimmest under-sink tankless RO systems available, and the Cypress is an NSF-certified carbon filter with a notably compact profile.
Brondell H2O+ Circle Tankless RO
The Brondell Circle (RC100, $300--$400) is a 4-stage tankless RO system producing 75 GPD with a 1:1 water-to-waste ratio -- one of the most efficient waste ratios in the residential RO market. NSF 58 certified. The Circle uses a composite filter design (CF filter + RO membrane in two cartridges) that simplifies replacement to two cartridges rather than the 5--7 separate stages of traditional systems. Filter replacement takes under 5 minutes with no tools (quarter-turn cartridge design). The Circle is available in white and black -- matching Brondell Swash bidet seat and modern kitchen design trends.
Brondell Cypress Carbon Filter
The Brondell Cypress (WQA Gold Seal, NSF 42 + 53, $150--$250) is a 2-stage under-sink carbon filter that connects directly to the existing cold faucet via a diverter valve -- no dedicated faucet or drilling required. NSF 53 lead certification. Filter life: 6 months per filter set. Comparable to the Aquasana Claryum Direct Connect in scope and installation approach, with a slimmer housing profile that fits under-sink cabinets with limited clearance.