APEC Water ROES-50, 5-Stage Under Sink Reverse Osmosis Water Filter System, NSF Certified 372 & 58, 50 GPD
The APEC ROES-50 is a 5-stage under-sink reverse osmosis system that forces water through an RO membrane to remove the broadest range of contaminants — lead, PFAS, arsenic, nitrate, fluoride and TDS. It's the maximum-removal alternative to the ZeroWater pitcher's countertop convenience, but it requires under-sink plumbing plus a dedicated faucet, sends some water to the drain, and demineralizes the water — so test your tap and confirm certification for your contaminant before you buy.
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What does the research say about the APEC Water ROES-50?
Every claim below is tied to a source you can open, quoted verbatim — how we research picks.
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“Research shows that these types of membranes are typically more than 90 percent effective at removing a wide range of PFAS, including shorter chain PFAS.”
Reverse osmosis / high-pressure membranes remove the vast majority of PFAS, including short-chain PFAS.
US EPA · 2024 ↗ -
“Reverse osmosis filters will remove some types of chemicals from water, including lead, copper, chromium, chloride, and sodium.”
Reverse osmosis removes lead and other dissolved chemicals from water.
CDC · 2024 ↗ -
“If PFAS have not been measured in your water, or if PFAS have been measured but are below federal limits, a filter may not be useful to you.”
A filter may not help unless you actually have the contaminant — test first.
US EPA · 2024 ↗
Educational summary of the research — not medical or veterinary advice. Evidence strength varies and individual results differ; talk to a qualified professional before changing your (or your pet's) health routine.
How does the APEC Water ROES-50 compare?
| APEC ROES-50 (under-sink RO) | ZeroWater pitcher | Faucet-mount filter (NSF 53) | |
|---|---|---|---|
| Removal breadth | Broadest: lead, PFAS, arsenic, nitrate, fluoride, TDS via RO membrane | Broad: lead, chromium, some PFAS via ion-exchange (TDS-driven) | Targeted: lead, chlorine, some PFAS at the tap |
| Installation | Under-sink, plumbed + dedicated faucet | None — countertop pitcher | Screws onto faucet, no plumbing |
| Water sent to drain | Yes — brine flushed to drain | None | None |
| Ongoing upkeep | Filter swaps ~6–12 mo, membrane ~2–4 yr | Frequent filter swaps as TDS meter climbs | Cartridge swap ~2–3 months |
| Removes minerals | Yes — demineralizes water | Yes — ion-exchange strips TDS | No — leaves minerals |
Buy it if
- You tested your tap and found lead, arsenic, nitrate, or PFAS you want removed
- You want the broadest removal from a single system and can commit to an under-sink install
- Homeowners fine with a dedicated drinking-water faucet and occasional filter/membrane swaps
- Anyone prioritizing maximum contaminant removal over pitcher convenience
Skip it if
- Renters or anyone who can't plumb an under-sink unit and drill a faucet hole
- You want zero water waste and no plumbing — a pitcher or faucet-mount fits better
- Your water already tested clean — CDC notes you may decide you don't need a filter at all
Is the APEC Water ROES-50 worth it?
The maximum-removal pick: an NSF/ANSI 58-certified under-sink reverse osmosis system that reduces lead, PFAS, arsenic and nitrate more completely than the ZeroWater pitcher can. Worth it if you've tested your water and can accept under-sink install, some drain water, and demineralized output.
Check price on Amazon Live price & reviews on AmazonQuestions, answered
- Pitcher or under-sink RO — which should I actually get?
- Choose reverse osmosis (like the ROES-50) when you've tested your tap, found something specific — lead, PFAS, arsenic, nitrate — and want the widest removal on its own plumbed faucet. Choose the ZeroWater pitcher when you rent, can't drill or plumb, or want zero water waste and a lower upfront cost. RO removes more; the pitcher installs in seconds. Source CDC — choosing home water filters ↗EPA — reducing PFAS with a home filter ↗
- Does reverse osmosis really remove lead and PFAS?
- Yes. The CDC states RO filters remove chemicals including lead, and the EPA reports that RO/high-pressure membranes are typically more than 90% effective at removing a wide range of PFAS — provided the system is certified for the contaminant and properly maintained. Source CDC — home water filters ↗EPA — PFAS treatment technologies ↗
- Should I test my water first, and does RO waste water and strip minerals?
- Test first — the EPA warns a filter may not be useful if the contaminant isn't present or is below federal limits, and the CDC says testing helps you choose the right filter. Understand the trade-offs too: RO sends some water to the drain as brine and demineralizes the water it treats. Know your contaminant before you commit. Source EPA — PFAS home filter ↗CDC — choosing home water filters ↗
- What certification should I look for on an RO system?
- For reverse osmosis, look for NSF/ANSI 58 (and NSF/ANSI 53 for filters), the standards the EPA points to for PFAS reduction; NSF/ANSI 372 confirms lead-free contact materials. Note the EPA's caveat that current PFAS certification standards may not yet guarantee removal down to the newest federal limits. Source EPA — reducing PFAS with a home filter ↗