APEC · Under-sink reverse osmosis
APEC ROES-50: what it removes and what it costs
The APEC ROES-50 is certified (NSF/ANSI 58) to reduce TDS. For 2 people drinking and cooking with it, replacement filters cost about $87 a year, and it sends about 601 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 APEC ROES-50 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 APEC cites a lab report but no certifier lists the claim. See certified vs. tested.
| Contaminant | Status | Evidence |
|---|---|---|
| TDS | Certified | WQA listing, NSF/ANSI 58 ("TDS") |
Not verified, either way (no certification or brand claim): PFAS, Lead, Chlorine, Chloramine, Fluoride, Arsenic, 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 | $87 | 301 gal ($6) | $94 | 92¢ |
| 2 people | 204 | $87 | 601 gal ($13) | $100 | 49¢ |
| 4 people | 409 | $87 | 1,202 gal ($25) | $113 | 28¢ |
Rated production is 50 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 |
|---|---|---|---|
| Stages 1-3 pre-filter set (sediment + 2 carbon) | — Source note | 6 Source noteManual: replace every 6-12 months cdn.shopify.com | $29.95 Source note |
| MEM-ES-50 RO membrane (stage 4) | — Source note | 24 Source noteManual: city water every 2-4 years; well water every 2 years cdn.shopify.com | $39.95 Source note |
| Stage 5 inline carbon | — Source note | 24 Source noteManual: every 2-4 years cdn.shopify.com | $14.95 Source noteQuick-connect inline carbon; confirm fit apecwater.com |
Specs
- Type
- Under-sink reverse osmosis
- Price
- $231
Source note
No compare-at price shown 2026-10-23 apecwater.com
- Installation
- DIY (under-sink or inline fittings)
- Rated production
- 50 gallons per day
Source note
Manual performance data: production rate 45.3 gpd (printed as 'L/gpd') apecwater.com
- Pure to drain
- 0.34:1 est.
Source note
Derived from manual recovery rating 25.4% (25.4/74.6); efficiency rating 11.8%. Brand states no pure:drain ratio cdn.shopify.com
- Tank
- 4 gal
Source note
- Needs power
- No
- Remineralization
- No
Where it ranks
Compare the APEC ROES-50
Common questions
What does the APEC ROES-50 remove?
The APEC ROES-50 is certified (NSF/ANSI 58) to reduce TDS. For 2 people drinking and cooking with it, replacement filters cost about $87 a year, and it sends about 601 gallons a year to the drain.
Does the APEC ROES-50 remove PFAS?
It has no certifier listing or brand claim for PFAS reduction.
How much does the APEC ROES-50 cost to run?
About $100 a year for 2 people ($94 for 1, $113 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.