Product comparison · Reverse Osmosis
Express Water EZRO5 vs Crystal Quest Countertop RO
The Express Water EZRO5 scores 6.1 and ranks 32nd of 69 in Reverse Osmosis; the Crystal Quest Countertop RO scores 5.6 and ranks 55th of 69 in Reverse Osmosis. The Countertop RO leads on contaminant reduction.
6.1
5.6
All 30 Crystal Quest products 
Crystal Quest Countertop RO
$202 · 55th of 69 in Reverse Osmosis
- Contaminant Reduction — 8 against 7
Across everything we scored, Express Water EZRO5 sits 0.48 ahead.
Verdict
EZRO5 ahead · +0.48 (6.1 vs 5.6)Pick the Express Water EZRO5 when
Price matters$165vs$202
You want carbon block
Pick the Crystal Quest Countertop RO when
Flow rate matters5vs4
Contaminant reduction matters8vs7
Build quality matters6vs5
Where the Express Water EZRO5 and Crystal Quest Countertop RO differ
Scores on a 0–10 scale. Each row is one criterion, biggest difference first.
Flow Rate
+1 Crystal QuestBuild Quality
+1 Crystal QuestCertification Coverage
tiedWarranty & Support
tiedEase of Installation
tiedValue
tiedFilter Life
one side unscoredWhat Express Water EZRO5 and Crystal Quest Countertop RO owners report
Independent sources, scored for each model. EZRO5 on 4 of five, Countertop RO on 5.
The Express Water EZRO5 reading covers its product line; the Crystal Quest Countertop RO reading covers its product line.
What they say
Express Water EZRO5
- An r/WaterTreatment owner of the Express Water countertop unit reports running it since 2022 and being happy with it, adapted for use away from the sink in a rental - which is the exact case this product is sold for.
- Wider countertop RO discussion in the same subreddit is sceptical of the category, warning about leak points and about brands that certify components rather than whole systems, a criticism that lands here.
Crystal Quest Countertop RO
- An r/WaterTreatment thread titled directly on Crystal Quest RO systems draws an installer replying that the systems are good and that they have fitted several, and an r/sandiego thread recommends the under-sink and countertop lines from years of use.
- The same RO thread carries the most useful criticism in the brand pool, from a buyer defeated by roughly twelve models and seven optional add-ons before choosing anything.
- Neither is long-term ownership reporting on this unit.
The Express Water EZRO5 reading covers its product line; the Crystal Quest Countertop RO reading covers the whole brand.
What they say
Express Water EZRO5
- TapWaterData's certification audit records that no Express Water countertop model appears in any certifier's database and that the brand's contaminant marketing runs well beyond its NSF/ANSI 58 TDS-only listing on two under-sink models.
- Editorial coverage places the range at the budget entry of the countertop category on price and build.
Crystal Quest Countertop RO
- Coverage credits the range and the published pricing and returns to the certification gap: media certified, no finished system listed at NSF, IAPMO or WQA under the brand name, and the TDS rejection figure supplied by the brand own laboratory rather than a certifier.
- One brand analysis places Crystal Quest reverse osmosis explicitly below APEC, iSpring, AquaTru and Brondell on that basis, since each of those holds a finished-product NSF/ANSI 58 listing for TDS reduction under its own name.
YouTube
one side unscoredNo usable source for the Express Water EZRO5.
What they say
Express Water EZRO5
No usable source.
Crystal Quest Countertop RO
- An independent channel that lab-tests filtration systems included the Crystal Quest Countertop Thunder in a comparison of 26 countertop systems, ten of them countertop reverse osmosis, with professional laboratory analysis run on every unit.
- That puts this system in front of measured competitors rather than in a roundup, which no other Crystal Quest tank or drinking-water system manages.
- The published summary does not isolate its individual result.
Amazon
+3 Express WaterBoth readings are about these exact models.
What they say
Express Water EZRO5
- ASIN B07Q47KNMT reads 4.3 from 556 ratings for this exact model.
- The figure does not repeat on sibling listings - the under-sink base reads 4.6 from 6,157 and the six-stage countertop 2.2 from 5 - so it is a product rating rather than a shared aggregate.
Crystal Quest Countertop RO
- The countertop reverse osmosis system is ASIN B000NY8X9I, model field CQE-CT-00142, at 2.4 out of 5 from 36 ratings — a real product-level pool on this exact SKU and the lowest Crystal Quest figure readable on the platform.
- It is not the only product-level Crystal Quest rating on Amazon: the bath and faucet variant family reads 4.4 across 1,296, the shower line 4.1 from 157 and 4.3 from 147, the pitcher 4.1 from 103 and the fluoride under-sink chassis 3.6 from 51.
- Against all of those and against the 4.3 brand panel, this row is the outlier, and the readable reviews centre on throughput — one describing the unit as usable only by filling a large container over several hours or overnight.
Owner reviews
+3 Express WaterThe Express Water EZRO5 reading covers its product line; the Crystal Quest Countertop RO reading covers the whole brand.
What they say
Express Water EZRO5
- Home Depot lists Express Water in its countertop water filter category and Walmart carries the countertop range with per-product review files.
- Home Depot, Lowe's, Walmart and Amazon all stock Express Water.
Crystal Quest Countertop RO
- Trustpilot reads 4.0 from 54 reviews with 37 in the past twelve months, but bimodally, at 50 percent five-star against 39 percent one-star.
- BBB Kennesaw disagrees at 1 out of 5 from six customer reviews against an A plus accreditation, and its most detailed complaint is a countertop filter falling from normal output to under a quart a day within a month.
- A separate BBB complaint concerns a Crystal Quest reverse osmosis system that failed at two weeks and discharged over a hundred gallons into the owner yard.
Express Water EZRO5 vs Crystal Quest Countertop RO: pros and cons
What each one does well, and where it falls short.
Pros 5
No plumbing work at all - installs on a threaded faucet aerator in minutes
Lightest system in the range at 7.75 lbs, easy to take to a new address
Express Water publishes the real throughput rather than only the membrane rating
Standard four-stage RO architecture with replaceable quick-connect cartridges
Cheapest route into reverse osmosis Express Water sells
Cons 6
Half a gallon to one gallon per hour in practice, despite a 100 GPD membrane rating
Incompatible with sprayer faucets and any aerator that is not threaded and removable
Occupies permanent counter space next to the sink
No NSF listing
Discharges one to four gallons per gallon produced, the worst ratio in the range
One-year warranty
Pros 5
Honest published throughput: 50 GPD nominal, about 25 gallons a day in practice
No plumbing work, no under-sink tank, removable when moving
Optional arsenic, nitrate, fluoride and remineraliser cartridges fit the same body
Ten stages of pre and post filtration around the membrane
Included in an independent 25-system RO comparison, which is unusual for this brand
Cons 5
No NSF/ANSI 58 listing, so the TDS rejection claim is unverified
About 25 gallons a day is drinking water only, not cooking volume
No published cartridge or membrane replacement interval
No dimensions published for the unit or its reservoir
One-year limited warranty and filter media cannot be returned
Express Water EZRO5 vs Crystal Quest Countertop RO: the numbers
Price, scores and rank, then only the specs that differ. Green marks the side with more.
6.1
32nd of 69 in Reverse Osmosis
Filtration
Both Granular Activated Carbon, Reverse Osmosis, Sediment
Express Water EZRO5
+ Carbon Block
Crystal Quest Countertop RO
+ KDF, Specialty Resin
Removes
Both Chlorine, Fluoride, Heavy metals, Sediment, TDS, Lead
Express Water EZRO5
Nothing more
Crystal Quest Countertop ROMore
+ Arsenic, Nitrate, Taste and Odor, Cysts, VOCs
SpecExpress Water EZRO5Crystal Quest Countertop RO
Filter life6-12 monthsNot listed
Dimensions8.875 x 14 x 6.5 inNot listed
Weight7.75 lbs7.6 lb (shipping)
Made inNot listedUSA
Same on both
- Certifications Not certified
- Flow rate Under 100 GPD
- Warranty 1 Year
- Connection Point of use fitting
- Housing Not specified
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Not sold on either one?
The top-scored and the cheapest other pick from each brand.
More from Express Water 11 scored in Reverse Osmosis
What’s different
- Certifications: adds NSF/ANSI 58, NSF/ANSI 372
- Removes: adds Arsenic, Calcium +1 more
Pick it ifCertification coverage matters7vs2NSF/ANSI 58 only on the RO5DX
More from Crystal Quest 1 scored in Reverse Osmosis
What’s different
- Filtration: adds Carbon Block, Ultrafiltration
- Removes: adds Chloramine, Bacteria
Pick it ifBuild quality matters8vs6
Express Water EZRO5 vs Crystal Quest Countertop RO: common questions
Is the Express Water EZRO5 better than the Crystal Quest Countertop RO?
On our scores, the Express Water EZRO5 is ahead, 6.1 against 5.6. The Crystal Quest Countertop RO leads on contaminant reduction (8 against 7), flow rate (5 against 4) and build quality (6 against 5).
Which is cheaper, the Express Water EZRO5 or the Crystal Quest Countertop RO?
The Express Water EZRO5, at $165 against $202: $37 less.
Which removes more contaminants, the Express Water EZRO5 or the Crystal Quest Countertop RO?
The Express Water EZRO5 lists 6 and the Crystal Quest Countertop RO lists 11, with 6 on both lists. Only the Crystal Quest Countertop RO lists Arsenic, Nitrate, Taste and Odor, Cysts and VOCs.
What do owners say about the Express Water EZRO5 and the Crystal Quest Countertop RO?
Across 4 independent sources scored for both, the Express Water EZRO5 is ahead on Google, Amazon and Owner reviews; the Crystal Quest Countertop RO is ahead on Reddit.
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Scores calculated 16 September 2026 · Products excluded where fewer than two independent sources cover them · How we score