Reverse osmosis replacement match
Brondell Circle reverse-osmosis membrane replacement
Part RF-40 for select Brondell filtration systems, including RC100.
RF-40 fit summaryRF-40 is the RO membrane for the Circle RC100. It does not replace the shorter-life RF-20 carbon and pre-filter set.
Buy NowCompatible systems in our guide
RC100
Replacement guidance
Approximately every 24 months, subject to water quality and use. Multi-stage systems can require different schedules for different cartridges, so use the manual rather than replacing every stage automatically at the same time.
Checks before purchasing
- Confirm the complete system model and stage count.
- Compare the installed cartridge or membrane part number.
- Confirm membrane capacity and connection style where applicable.
- Review the manufacturer’s current compatibility information.
How this entry was verified
We used the named manufacturer’s replacement information as the primary compatibility reference. Retailer descriptions are a purchasing aid, not our source of truth.
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