Reverse osmosis replacement match
Brondell Circle carbon and pre-filter replacement set
Part RF-20 for select Brondell filtration systems, including RC100.
RF-20 research summaryRF-20 contains the staged replacement filters for the Circle RC100. The system's RO membrane is RF-40 and follows a separate schedule. Confirm current compatibility with the manufacturer before ordering.
Systems listed in our guide
RF-20 is associated with the Brondell RC100 system in our research. Open the model page to see every replacement associated with that system, then confirm with the manufacturer.
Filters and stages included
This listing covers the following components. Confirm the quantity, stage order, and part labels shown in the current manufacturer listing before ordering.
- Stage 1 sediment pre-filter
- Stage 2 pre-carbon filter
- Stage 4 post-carbon filter
A complete kit does not mean every stage is due at the same time. Use the system manual’s schedule for each component.
Replacement schedule for RF-20
Every 6 months, subject to water quality and use. Treat this only as general product guidance and follow the system manual. Water quality, usage, pressure, and sediment can change actual filter life.
Reverse-osmosis stages often expire on different schedules. Replacing this item does not necessarily mean the membrane, pre-filters, and post-filter are all due at the same time.
How to avoid ordering the wrong filter
- Confirm the system label includes the complete model, including every dash and suffix.
- Compare the installed part number with RF-20.
- Confirm the stage, membrane capacity, and connection style.
- Do not rely on cartridge color, dimensions, or product photography alone.
RF-20 contains the staged replacement filters for the Circle RC100. The system's RO membrane is RF-40 and follows a separate schedule.
After installing the replacement
Follow the system manual, restore the water supply slowly, inspect every connection for leaks, and flush the new filter using the manufacturer’s specified volume before drinking the water.
If flow remains low, water tastes unusual, or a leak appears, shut off the supply and recheck the cartridge alignment, seals, tubing, and complete part number. Seek qualified help when needed.
How this entry was researched
We used the named manufacturer’s replacement information as the primary compatibility reference. Retailer descriptions are a purchasing aid, not our source of truth, and this research does not guarantee fit.
Open manufacturer information →