Brondell · Under-sink reverse osmosis
Brondell Circle RC100: what it removes and what it costs
Model: Circle RC100 (H2O+ Circle); filters RF-20 (sediment, pre-carbon, post-carbon) and RF-40 (RO membrane)
The Brondell Circle RC100 is certified (NSF/ANSI 58, NSF/ANSI 53 and NSF/ANSI 42) to reduce lead, chlorine, fluoride, arsenic, chromium 6 and cysts and 3 more of the contaminants we track. For 2 people drinking and cooking with it, replacement filters cost about $205 a year, and it sends about 409 gallons a year to the drain.
9
certified reductions we track
—
filters per gallon at rated life
Price checked 2026-10-23. We may earn a commission.
What the Brondell Circle RC100 removes
"Certified" means a certifier (NSF, WQA, IAPMO or CSA) lists this exact product for that reduction claim; the listing is linked. "Brand test only" means Brondell cites a lab report but no certifier lists the claim. See certified vs. tested.
| Contaminant | Status | Evidence |
|---|---|---|
| Lead | Certified | WQA listing, NSF/ANSI 58 ("Lead") |
| Chlorine | Certified | WQA listing, NSF/ANSI 42 ("Aesthetic Chlorine") |
| Fluoride | Certified | WQA listing, NSF/ANSI 58 ("Fluoride") |
| Arsenic | Certified | WQA listing, NSF/ANSI 58 ("Arsenic (V) (50 ppb influent level)") |
| Chromium 6 | Certified | WQA listing, NSF/ANSI 58 ("Hexavalent Chromium") |
| Cysts | Certified | WQA listing, NSF/ANSI 58 ("Cyst") |
| VOCs | Certified | WQA listing, NSF/ANSI 53 ("VOC (as chloroform)") |
| TDS | Certified | WQA listing, NSF/ANSI 58 ("TDS") |
| Copper | Certified | WQA listing, NSF/ANSI 58 ("Copper") |
Not verified, either way (no certification or brand claim): PFAS, Chloramine, Nitrate, Mercury, Microplastics, Bacteria and viruses, Iron, Uranium, 1,4-dioxane.
What it costs to run
Yearly cost = replacements per year × filter price, for each filter it uses; a filter is replaced at its gallon rating or its month limit, whichever comes first, plus the water sent to the drain at an average water and sewer price. Water use: drinking and cooking water (0.28 gallons per person a day, EPA's average adult intake).
| Household | Gallons a year | Filters a year | Drain water | Total a year | Per gallon |
|---|---|---|---|---|---|
| 1 person | 102 | $205 | 204 gal ($4) | $209 | 205¢ |
| 2 people | 204 | $205 | 409 gal ($9) | $214 | 104¢ |
| 4 people | 409 | $205 | 818 gal ($17) | $222 | 54¢ |
Rated production is 40 gallons a day; 2 people need about 0.56 — well within it. Colder water and lower pressure reduce actual output.
Replacement filters
| Filter | Rated life (gallons) | Rated life (months) | Price |
|---|---|---|---|
| RF-20 set: sediment, pre-carbon plus, post carbon block | 475 Source noteFaucet indicator: 6 months or 475 gallons brondell.com | 6 Source note | $79.99 Source note |
| RF-40 RO membrane | — | 24 Source note | $89.99 Source note |
Specs
- Type
- Under-sink reverse osmosis
- Price
- $450
Source note
No sale shown 2026-10-23 brondell.com
- Installation
- DIY (under-sink or inline fittings)
- Rated production
- 40 gallons per day
Source note
Manual PDS: daily water production rate 40 GPD brondell.com
- Pure to drain
- 0.5:1 est.
Source note
Derived from manual PDS efficiency rating 33.5% (33.5/66.5); brand says up to 10x less waste than traditional RO brondell.com
- Tank
- 1.6 gal
Source note
Spec sheet: 6 L built-in tank brondell.com
- Flow rate
- 0.26 gal/min
Source note
Faucet flow 0.26-0.37 gpm; rated service flow 0.07 gpm brondell.com
- Needs power
- No
- Remineralization
- No
Compare the Brondell Circle RC100
Updates about the Brondell Circle RC100
- August 3, 2026 · EPA publishes protocol for its fluoride toxicity review
Common questions
What does the Brondell Circle RC100 remove?
The Brondell Circle RC100 is certified (NSF/ANSI 58, NSF/ANSI 53 and NSF/ANSI 42) to reduce lead, chlorine, fluoride, arsenic, chromium 6 and cysts and 3 more of the contaminants we track. For 2 people drinking and cooking with it, replacement filters cost about $205 a year, and it sends about 409 gallons a year to the drain.
Does the Brondell Circle RC100 remove PFAS?
It has no certifier listing or brand claim for PFAS reduction.
How much does the Brondell Circle RC100 cost to run?
About $214 a year for 2 people ($209 for 1, $222 for 4), counting replacement filters and the water sent to the drain, for drinking and cooking water (0.28 gallons per person a day, EPA's average adult intake).
Data checked 2026-10-23. 102 filters tracked.