Product comparison · Reverse Osmosis
Aquasure Premier Advanced Alkaline 75 GPD vs Express Water ROALK10
The Aquasure Premier Advanced Alkaline 75 GPD scores 5.8 and ranks 44th of 69 in Reverse Osmosis; the Express Water ROALK10 scores 6.2 and ranks 20th of 69 in Reverse Osmosis. The Premier Advanced Alkaline 75 GPD leads on ease of installation.
All 30 Aquasure products 
Aquasure Premier Advanced Alkaline 75 GPD
$220 · 44th of 69 in Reverse Osmosis
- Ease of Installation — 6 against 5
5.8
6.2
Across everything we scored, Express Water ROALK10 sits 0.38 ahead.
Verdict
ROALK10 ahead · +0.38 (6.2 vs 5.8)Pick the Aquasure Premier Advanced Alkaline 75 GPD when
Ease of installation matters6vs5
Pick the Express Water ROALK10 when
You want granular activated carbon
Where the Aquasure Premier Advanced Alkaline 75 GPD and Express Water ROALK10 differ
Scores on a 0–10 scale. Each row is one criterion, biggest difference first.
Contaminant Reduction
tiedCertification Coverage
tiedFlow Rate
tiedFilter Life
tiedBuild Quality
tiedWarranty & Support
tiedValue
tiedWhat Aquasure Premier Advanced Alkaline 75 GPD and Express Water ROALK10 owners report
Independent sources, scored for each model. Premier Advanced Alkaline 75 GPD on 5 of five, ROALK10 on 5.
The Aquasure Premier Advanced Alkaline 75 GPD reading covers its product line.
What they say
Aquasure Premier Advanced Alkaline 75 GPD
- Two r/WaterTreatment and r/HomeMaintenance threads cover the Premier RO platform this system is built on.
- One owner reports 420 ppm TDS at the faucet on a new install, settling to about 360, which is a poor rejection figure; the second describes the Flowlok leak-detection disc deploying during a filter change when a drain-line fitting leaked, which reads as the safety feature working.
- Nothing addresses the alkaline stage specifically, and the subreddit's general scepticism about alkaline water claims is background rather than evidence about this unit.
Express Water ROALK10
- r/HydroHomies discusses this exact system and concludes the water does come out alkaline but that the strength drifts over cartridge life.
- Wider r/WaterTreatment threads recommend the platform for taste and value while flagging the involved install and the cabinet space the tank demands, and O-rings weeping at the housings recur as the mechanical complaint across the range.
The Aquasure Premier Advanced Alkaline 75 GPD reading covers the whole brand; the Express Water ROALK10 reading covers its product line.
What they say
Aquasure Premier Advanced Alkaline 75 GPD
- Modernize and Quality Water Lab cover Aquasure through the Harmony softeners.
- Dominick Plumbing notes the absence of NSF certification across the brand.
- No third-party review of the Premier RO systems exists.
Express Water ROALK10
- WaterFilterGuru bench-tested the platform's RO5DX with Tap Score lab analysis at 8.13 overall and measured a final stage lifting pH to 9.0, which is the closest independent measurement of this remineralisation stage available.
- TapWaterData records that no alkaline SKU appears in any certifier's database, so the mineral claim rests on Express Water's own data.
YouTube
+1 AquasureThe Aquasure Premier Advanced Alkaline 75 GPD reading covers its product line; the Express Water ROALK10 reading covers its product line.
What they say
Aquasure Premier Advanced Alkaline 75 GPD
- IrixGuy's Adventure Channel, 98,800 subscribers, has two independent owner reviews of the Premier RO - one after several months at 6,100 views and a several-years follow-up - and a separate third-party self-install walkthrough covers the same 4-stage system.
- None names a specific capacity, so this is the Premier line rather than this model.
- The alkaline stage is not addressed in any of them, and the RO roundups that bench-test at this price point do not include Aquasure.
- Brand-level coverage is the Harmony softeners: DIY Homestead Projects at roughly 115,000 views, NKP Home Improvement at roughly 94,000, geminidrums at 15,000 on the fine mesh and IrixGuy's two-year owner review at 13,000.
Express Water ROALK10
- An independent lab tester excluded the platform's RO5DX from a best-of list over its three-flush break-in, which applies to this chassis.
- Hands-on videos of the alkaline configuration report clean taste and predictable upkeep, but the highest-reach ones carry affiliate codes or a sponsorship disclosure and are not weighted.
Amazon
+2 Express WaterThe Aquasure Premier Advanced Alkaline 75 GPD reading covers its product line; the Express Water ROALK10 reading covers its product line.
What they say
Aquasure Premier Advanced Alkaline 75 GPD
- No separate Amazon listing for the alkaline 75 GPD configuration carries a readable rating; the replacement alkaline cartridge has its own pool and is a consumable, not the system.
- The score falls back to the Premier 75 GPD at 4.4 from roughly 276, which is the same system without the remineralisation stage.
Express Water ROALK10
- The 100 GPD alkaline sibling ASIN B0DJWYBGTS reads 4.4 from 91 ratings, distributed 78 percent five-star but with 10 percent at one star - the weakest distribution of any Express Water RO with a readable pool.
- The 50 GPD alkaline listing reads 4.6 from 2,496.
- Faucet finish is the only difference between them and this SKU.
Owner reviews
tiedThe Aquasure Premier Advanced Alkaline 75 GPD reading covers its product line; the Express Water ROALK10 reading covers its product line.
What they say
Aquasure Premier Advanced Alkaline 75 GPD
- Home Depot lists this alkaline model at 4.0 of 5 from eight reviews, which is below the ten-review floor and not scorable on its own, so the figure used is the standard Premier Advanced at 4.5 of 5 from 41 reviews on the same RO hardware.
- That pool is native, with verified-purchase entries and Aquasure replying under its own support address.
- Scored a point below the standard model because the alkaline version's own eight-review file, thin as it is, points lower rather than higher, and because the 100 GPD Pro at 4.2 from 10 sits between them.
Express Water ROALK10
- Home Depot stocks the alkaline configuration under several finish SKUs including internet #307338928 and #307329117, each with its own review file, and Walmart carries the platform.
Aquasure Premier Advanced Alkaline 75 GPD vs Express Water ROALK10: pros and cons
What each one does well, and where it falls short.
Pros 5
Alkaline stage genuinely addresses the flat taste of RO permeate
Same 1.5 to 1 pure-to-drain ratio as the standard Premier, better than most tank RO
Tank, lead-free faucet and full cartridge set included
Quick-twist cartridge changes and Flowlok leak protection
Only thirty dollars over the non-alkaline version
Cons 6
The 8.5 to 10 pH claim has no test data behind it and the upper figure would be unusual in practice
No system-level NSF certification; the Aquasure listing covers membrane materials only
Alkaline water health claims are not supported by evidence and Aquasure leans on them in its copy
75 GPD with a three gallon tank means slow recovery under heavy use
One year warranty against five on the softeners
Its own Home Depot pool sits at 4.0 of 5, the lowest of the Premier range, on eight reviews
Pros 5
Remineralisation cartridge restores calcium, magnesium and potassium after the membrane
Independent testing of the same stage on a sibling model recorded pH 9.0
Standard 10 inch cartridges, no proprietary sizes
Leak-detection pad and clear first-stage housing included
Same footprint as the non-alkaline system, so no extra cabinet cost
Cons 6
No NSF listing - the alkaline and contaminant claims rest entirely on Express Water's own data
Mineral output is reported to fall off across cartridge life and no output range is published
One additional cartridge to buy and change every six months
One-year warranty
50-100 GPD production is slow against tankless systems at similar money
Discharges one to three gallons per gallon produced
Aquasure Premier Advanced Alkaline 75 GPD vs Express Water ROALK10: the numbers
Price, scores and rank, then only the specs that differ. Green marks the side with more.
5.8
44th of 69 in Reverse Osmosis
6.2
20th of 69 in Reverse Osmosis
Filtration
Both Alkaline Remineralization, Carbon Block, Reverse Osmosis, Sediment
Aquasure Premier Advanced Alkaline 75 GPD
Nothing more
Express Water ROALK10
+ Granular Activated Carbon
Removes
Both Chlorine, Fluoride, Heavy metals, TDS, Lead
Aquasure Premier Advanced Alkaline 75 GPDMore
+ Low pH, PFAS, Taste and Odor, Microplastics, VOCs
Express Water ROALK10
+ Arsenic, Calcium, Nitrate, Sediment
SpecAquasure Premier Advanced Alkaline 75 GPDExpress Water ROALK10
DimensionsNot listed17 x 15 x 5 in
Weight23 lb (shipping)12.8 lbs
Same on both
- Certifications Not certified
- Flow rate Under 100 GPD
- Filter life 6-12 months
- Warranty 1 Year
- Connection Point of use fitting
- Housing Not specified
- Made in Not stated
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Not sold on either one?
The top-scored and the cheapest other pick from each brand.
More from Aquasure 3 scored in Reverse Osmosis
What’s different
- Filtration: no Alkaline Remineralization
- Removes: adds Sediment
Pick it ifValue matters9vs7
More from Express Water 11 scored in Reverse Osmosis
What’s different
- Filtration: no Alkaline Remineralization
- Certifications: adds NSF/ANSI 58, NSF/ANSI 372
Pick it ifCertification coverage matters7vs2NSF/ANSI 58 only on the RO5DX
What’s different
- Filtration: no Alkaline Remineralization
- Removes: no Arsenic, Calcium +1 more
Pick it ifEase of installation matters9vs5
Aquasure Premier Advanced Alkaline 75 GPD vs Express Water ROALK10: common questions
Is the Aquasure Premier Advanced Alkaline 75 GPD better than the Express Water ROALK10?
On our scores, the Express Water ROALK10 is ahead, 6.2 against 5.8. The Aquasure Premier Advanced Alkaline 75 GPD leads on ease of installation (6 against 5).
Which is cheaper, the Aquasure Premier Advanced Alkaline 75 GPD or the Express Water ROALK10?
The Aquasure Premier Advanced Alkaline 75 GPD, at $220 against $233: $13 less.
Which removes more contaminants, the Aquasure Premier Advanced Alkaline 75 GPD or the Express Water ROALK10?
The Aquasure Premier Advanced Alkaline 75 GPD lists 10 and the Express Water ROALK10 lists 9, with 5 on both lists. Only the Aquasure Premier Advanced Alkaline 75 GPD lists Low pH, PFAS, Taste and Odor, Microplastics and VOCs.
What do owners say about the Aquasure Premier Advanced Alkaline 75 GPD and the Express Water ROALK10?
Across 5 independent sources scored for both, the Aquasure Premier Advanced Alkaline 75 GPD is ahead on YouTube; the Express Water ROALK10 is ahead on Reddit, Google and Amazon; Owner reviews is level.
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Scores calculated 16 September 2026 · Products excluded where fewer than two independent sources cover them · How we score