APEC ROES-50 Essence 5-Stage Reverse Osmosis System

Name: APEC ROES-50 Essence 5-Stage Reverse Osmosis System
Brand: APEC Water Systems
Price: 230.99 USD

Reverse osmosis · Not stated · Treats nitrates, pfas · $231 at APEC Water Systems as of Oct 2026

The APEC ROES-50 is a five-stage under-sink reverse osmosis system that treats drinking water at one faucet, not the whole house: sediment filter, two carbon blocks, a TFC membrane and a coconut shell carbon post-filter. The product page calls it a WQA Gold Seal certified system; the owner's manual and WQA's listing say it is certified by WQA to NSF/ANSI 58 for TDS reduction only. Nitrate, PFAS, PFOA, PFOS, arsenic, fluoride and lead appear on the page's 'removes up to 99% of contaminants' checklist as manufacturer claims; no certified per-contaminant percentages are published.

Output is rated 50 gallons per day at 60 psi and drops to 30 GPD at 50 psi, within a 40-85 psi feed range and a 2,000 ppm TDS ceiling. A 4-gallon tank and lead-free faucet are included; the manual schedules pre-filters every 6-12 months and the membrane every 2-4 years (2 on well water), and lists an 11.80% efficiency rating. The system is 15.5 x 5.25 x 17 in. and 26 lb.

Price was $230.99 at apecwater.com as of Oct 2026 (regular price, in stock). Install is DIY with quick-connect fittings and needs a faucet hole, cold-water tee and drain saddle. Warranty is 1 year, filters and membrane excluded, with lifetime phone support.

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APEC ROES-50 Essence 5-Stage Reverse Osmosis System well water reverse osmosis

Specifications

Verified 2026-10-06. Fields the manufacturer does not publish are marked “Not stated”.

APEC ROES-50 Essence 5-Stage Reverse Osmosis System specifications
Model	ROES-50 (Essence series, 50 GPD). ROES-50X is the same system bundled with an extra pre-filter set.
Type	Reverse osmosis
Treats	Nitrates, PFAS; also arsenic (III and V), fluoride, lead, chromium, radium, chlorine, taste and odor, total dissolved solids, bacteria, viruses and cysts (maker claim, not a certified claim)
Service flow	Not statedUnder-sink point-of-use system; no GPM service flow is published. Rated 50 gallons per day at 60 psi (30 GPD at 50 psi and 77 F). Feed water 40-85 psi, max TDS 2,000 ppm.
Capacity	Not stated50 gallons per day at 60 psi (30 gallons/day at 50 psi and 77 F) per the product page; 4-gallon pressurized storage tank (11 x 11 x 15 in.). Owner's manual (Ver. 7.3, Sep 2025) lists NSF/ANSI 58 test ratings of 11.80% efficiency and 25.40% recovery. Replacement schedule per manual: stage 1-3 pre-filters every 6-12 months; RO membrane every 2-4 years on city water or every 2 years on private well water; stage 5 carbon filter every 2-4 years.
Media / technology	Sediment filter, two carbon block filters, high-rejection TFC reverse osmosis membrane, coconut shell refining carbon post-filter
Stages	5
Connection	1/2 in. feed water adapter
Installation	DIY'Easy Do-it-yourself Installation & Maintenance': quick-connect fittings, colour-coded tubing, 1/2 in. feed water adapter, lead-free faucet and tank included. Needs a faucet hole, cold-water tee and drain saddle under the sink.
Warranty	1-year manufacturer warrantyAPEC warranty page: residential RO systems are 'free from defects in material and workmanship under normal use and service for a period of 1 year from purchase date'; used replaceable filter cartridges and membranes excluded. Owner's manual (Ver. 7.3, Sep 2025) Limited Product Warranty: 'one (1) year from the date of purchase', original purchaser only, new products only. 'Friendly Lifetime Customer & Tech Support' on the product page.
Certifications	WQA Gold Seal (NSF/ANSI 58, TDS reduction); NSF/ANSI/CAN 372 (lead content, WQA listed)Product page: 'WQA Gold Seal Certified System' and 'Our reverse osmosis system has been tested for TDS reduction.' Owner's manual (Ver. 7.3, Sep 2025): 'System Certified by WQA to NSF/ANSI 58 for TDS, as verified and substantiated by test data.' WQA product database (find.wqa.org, read 2026-10-06) lists APEC ROES-50 under NSF/ANSI 58 with TDS as the only reduction claim, and under NSF/ANSI/CAN 372 (lead content). Nitrate, PFAS/PFOA/PFOS, arsenic, fluoride and lead reduction are maker claims on the product page, not certified claims for this model. NSF certified-product database (info.nsf.org), searched 2026-10-06: ROES-50 is not on NSF's database. Advanced Purification Engineering Corp (301 Brea Canyon Rd, City of Industry, CA) is listed under NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372 for faucets only (FAUCET-CD-CP, FAUCET-D-NP, NZ-6401YY... etc.).
Dimensions	System 15.5 x 5.25 x 17 in.; tank 11 x 11 x 15 in.
Weight	26 lb
Price	$231 at APEC Water Systems as of Oct 2026

Published features

WQA Gold Seal Certified System
50 Gallons/day - Complete 5 Stage System
Comes with Premium Designer Faucet and 4 Gallon Tank
Removes Wide Range of Tap Water Contaminants
Engineered for Long-lasting Dependable Operation
Friendly Lifetime Customer & Tech Support
Systems designed and engineered in the USA

Pros and cons

Pros

Maker lists nitrate, PFOA and PFOS among the contaminants the system reduces
WQA Gold Seal certified system: certified by WQA to NSF/ANSI 58 for TDS reduction
Lowest regular (non-sale) price of the certified RO systems researched, with tank and faucet included
DIY install with quick-connect fittings and lifetime phone support

Cons

Only a 1-year warranty and no money-back guarantee stated on the warranty page
WQA certification covers TDS reduction only; nitrate, PFAS, arsenic and lead reduction are maker claims, not certified claims
50 GPD at 60 psi drops to 30 GPD at 50 psi; low-pressure wells may need a booster pump
Low water efficiency: 11.80% efficiency rating in the owner's manual

Our take

The ROES-50 has the lowest regular price of the certified RO systems we researched (the Aquasana SmartFlow was cheaper only at its sale price), with tank and faucet included, and the maker lists nitrate and PFAS among the contaminants it reduces. Buy it for a DIY drinking-water RO if you can accept a 1-year warranty and no published certified reduction figures. Low well pressure pulls output toward 30 GPD, so check your pressure first and retest the treated water.

Not sure it is the right size for your flow and your water test? Work through the sizing guide, or compare every system we cover on the best well water filtration systems (2026) list.

Where to buy

$231 at APEC Water Systems as of Oct 2026. Prices change; the links open the current listing.