iSpring · Under-sink reverse osmosis
iSpring RO500AK-BN: what it removes and what it costs
The iSpring RO500AK-BN is certified (NSF/ANSI 58) to reduce TDS. iSpring also claims lead, chlorine, fluoride and arsenic from lab tests that are not certification. For 2 people drinking and cooking with it, replacement filters cost about $196 a year, and it sends about 102 gallons a year to the drain.
1
certified reductions we track
—
filters per gallon at rated life
Price checked 2026-10-23. We may earn a commission.
What the iSpring RO500AK-BN 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 iSpring cites a lab report but no certifier lists the claim. See certified vs. tested.
| Contaminant | Status | Evidence |
|---|---|---|
| TDS | Certified | NSF listing, NSF/ANSI 58 ("TDS") |
| Lead | Brand test only | iSpring (brand claim, no tester named): "Lead" |
| Chlorine | Brand test only | iSpring (brand claim, no tester named): "Chlorine" |
| Fluoride | Brand test only | iSpring (brand claim, no tester named): "Fluoride" |
| Arsenic | Brand test only | iSpring (brand claim, no tester named): "Arsenic" |
Not verified, either way (no certification or brand claim): PFAS, Chloramine, Nitrate, Chromium 6, Mercury, Microplastics, Cysts, VOCs, Bacteria and viruses, Iron, Copper, 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 | $196 | 51 gal ($1) | $197 | 193¢ |
| 2 people | 204 | $196 | 102 gal ($2) | $198 | 97¢ |
| 4 people | 409 | $196 | 204 gal ($4) | $200 | 49¢ |
Rated production is 500 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 |
|---|---|---|---|
| FCF500 sediment+carbon composite | — Source note | 6 Source note | $45.99 Source note |
| MRO500 RO membrane | — Source note | 24 Source noteBrand: replaced every 2-3 years ispringfilter.com | $91.99 Source note |
| FCA500 carbon alkaline | — Source note | 12 Source note | $57.99 Source note |
Specs
- Type
- Under-sink reverse osmosis
- Price
- $693
Source note
No sale shown 2026-10-23 ispringfilter.com
- Installation
- DIY (under-sink or inline fittings)
- Rated production
- 500 gallons per day
Source note
NSF listing production rate 500 gpd ispringfilter.com
- Pure to drain
- 2:1
Source note
Brand: 'up to 2:1' ispringfilter.com
- Flow rate
- 0.4 gal/min
Source note
Brand: 'up to 0.4 gallons per minute' ispringfilter.com
- Needs power
- Yes
- Remineralization
- Yes
Compare the iSpring RO500AK-BN
Updates about the iSpring RO500AK-BN
- October 23, 2026 · New filters from Aug-Sep 2026: none yet confirmed in a certifier listing
Common questions
What does the iSpring RO500AK-BN remove?
The iSpring RO500AK-BN is certified (NSF/ANSI 58) to reduce TDS. iSpring also claims lead, chlorine, fluoride and arsenic from lab tests that are not certification. For 2 people drinking and cooking with it, replacement filters cost about $196 a year, and it sends about 102 gallons a year to the drain.
Does the iSpring RO500AK-BN remove PFAS?
It has no certifier listing or brand claim for PFAS reduction.
How much does the iSpring RO500AK-BN cost to run?
About $198 a year for 2 people ($197 for 1, $200 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.