Bosch ยท French door (counter-depth)
Bosch B21CT80SNS Water Filter Replacement
Confirmed by the manufacturer's spec sheet
The B21CT80SNS uses the Bosch UltraClarity Refrigerator Water Filter (BORPLFTR10)
- Part number
- BORPLFTR10
- Also sold as
- 11034152, BORPLFTR30, REPLFLTR10, RA450010
- Replace
- about every 6 months
Bosch now sells this filter as part 11034152, which covers the BORPLFTR10 and BORPLFTR30. It is the older UltraClarity filter and does not fit fridges that take the UltraClarity Pro (BORPLFTR55).
Save on your next change: Genuine 3-pack (11048053)
As an Amazon Associate I earn from qualifying purchases. We verify the genuine filter only. Non-genuine results aren't checked by us: confirm the listing names your model and an NSF/ANSI certification. Multi-pack links are Amazon searches for the manufacturer's own pack: check the brand and pack size on the listing.
Next change due in about 6 months. Add a reminder to your calendar:
Confirm before you buy
- Check the model label inside your fridge reads B21CT80SNS (or B21CT80SNB).
- The filter in your fridge now should be labelled BORPLFTR10 / 11034152 / BORPLFTR30 / REPLFLTR10 / RA450010.
How we checked this match
Confirmed by the manufacturer's spec sheet: Bosch B21CT80SNS spec sheet (lists the BORPLFTR10), Bosch B21CT80SNB spec sheet (lists the BORPLFTR10).
Checked 2026-10-28. Spotted an error? Tell us.
Replacing the B21CT80SNS water filter
It's the same BORPLFTR10 filter in every refrigerator that uses it, but where it sits and how its housing opens can differ between models. Follow the BORPLFTR10 replacement steps or our full guide, how to replace the water filter in a bosch refrigerator, and check your owner's manual for the filter's location on the B21CT80SNS.
No water from the dispenser after the change? Work through these checks before you call for service.
Other refrigerators that use the BORPLFTR10
B21CT80SNS water filter questions
What water filter does the Bosch B21CT80SNS use?
The Bosch UltraClarity Refrigerator Water Filter (BORPLFTR10), also sold as 11034152, BORPLFTR30, REPLFLTR10, RA450010. Confirmed by the manufacturer's spec sheet (Bosch).
How often should I change the B21CT80SNS water filter?
Replace the BORPLFTR10 about every 6 months. Change it sooner if water flow from the dispenser slows noticeably.
What should I check before buying the BORPLFTR10?
Bosch now sells this filter as part 11034152, which covers the BORPLFTR10 and BORPLFTR30. It is the older UltraClarity filter and does not fit fridges that take the UltraClarity Pro (BORPLFTR55).