APEC ROES-50 vs Express Water RO5DX

Last updated: November 2, 2026

The Express Water RO5DX and the APEC ROES-50 are evenly matched, rated 3.6 and 3.6.

APEC ROES-50 vs Express Water RO5DX

Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every with tank under-sink reverse osmosis system; a clear win is highlighted. How we rank explains each one.

Factor weightExpress Water RO5DXAPEC ROES-50
Overall rating3.6/53.6/5
Certification 25%100 certified to NSF/ANSI 58100 certified to NSF/ANSI 58
Filter cost 20%70 $81 a year in replacement filters67 $85 a year in replacement filters
Water wasted 15%50 drain ratio not published (neutral score used)50 drain ratio not published (neutral score used)
Output 10%0 50 gallons a day0 50 gallons a day
Price 15%85 $179.9985 $179.99
Warranty 15%0 1-year warranty0 1-year warranty

Independent measurements

Express Water RO5DX

Tested byTDS reductionOutputPure to drainConditions
Water Filter Guru-51.8 gpd-At 48 psi and 58.6 F.
Water Filter Guru--0.2 :164 oz purified to 336 oz drained (1:5.25); a 12 oz test gave 1:5.9.

APEC ROES-50

No independent test published yet.

Specifications

Express Water RO5DXAPEC ROES-50
Filtration
Output50 gallons a day50 gallons a day
Stages55
RemineralizationNoNo
NSF/ANSI 58YesYes
Other certificationsNSF/ANSI 372NSF/ANSI 372
Replacement filters$81 a year$85 a year
Build
Tank3.2 gal4 gal
Booster pumpNoNo
Smart faucetNoNo
Warranty1 year1 year

All under-sink reverse osmosis system comparisons →