APEC Essence ROES-50 Under-sink reverse osmosis, checked against its listings
- Maker’s list price
- $231
- Five years
- $566
Listings checked Oct. 4, 2026
What the listings say
NSF/ANSI 58 · WQA listing
TDS
Read the listing, checked Oct. 4, 2026
Certified for, and claimed
Certified, by a listing
- TDS
The listing’s own wording. None of these is a claim for one of the contaminants TapBuff tracks.
Claimed by the maker only
None recorded.
What it costs over five years
Household of 3, 3 gallons a day of drinking and cooking water. Installation not included.
| Item | Replaced | Count | Amount |
|---|---|---|---|
| System, with first media | — | 1 | $231 |
| Sediment filter (FI-ES-SED10) | Every 6 monthsmonth rating | 9 | $99 |
| Carbon block filter (FI-ES-CAB10) | Every 6 monthsmonth rating | 9 | $126 |
| RO membrane (MEM-ES-50) | Every 2 yearsmonth rating | 2 | $80 |
| Post carbon filter (FI-ES-TCR-QC) | Every 2 yearsmonth rating | 2 | $30 |
Five-year total$566
Per gallon10¢
Worth knowing
The only certified claim is TDS reduction. The maker's list of contaminants removed, including lead, arsenic and fluoride, is not on the listing. The maker gives 6 to 12 months for stages 1 to 3 and 2 to 4 years for the membrane and post filter; the shorter figures are recorded. The 3,000-gallon figure is the maker's rating for its 10-inch prefilters. No waste ratio is stated.
Where to go next
Your household’s cost
The five-year cost at your own household size and daily use.
Run it for your household