Aquasana AQ-5300+ Max Flow vs Express Water RO5 — Which Should You Buy?
Side-by-side comparison of Aquasana AQ-5300+ Max Flow and Express Water RO5. We compare specs, performance, and value to help you decide.
Feature Comparison
| Feature | Aquasana AQ-5300+ Max Flow | Express Water RO5 |
|---|---|---|
| Type | Carbon + prefilter | 5-stage RO |
| Capacity | 800 gallons | 75 GPD |
| Flow Rate | 0.72 GPM | — |
| Prefilter | Sediment | — |
| Removes | Lead, PFOA, chlorine | Lead, arsenic, fluoride |
| Certification | NSF | — |
| Filter Life | 6 months | — |
| Warranty | 1 year | 1 year |
| Stages | — | 5 (+ UV/alkaline options) |
| Tank | — | 3.2 gallon |
| UV | — | Optional |
| Alkaline | — | Optional |
Aquasana AQ-5300+ Max Flow
Pros
- ✓Higher capacity
- ✓Prefilter for sediment
- ✓Faster flow
- ✓Claryum technology
- ✓NSF certified
- ✓No electricity
- ✓Easy filter change
Cons
- ✗More expensive than 5200
- ✗Doesn't remove fluoride
- ✗Filter cost
Express Water RO5
Pros
- ✓5-stage RO
- ✓UV optional
- ✓Alkaline optional
- ✓Removes 99%
- ✓Fast flow
- ✓3.2-gal tank
- ✓Good for large families
Cons
- ✗Add-ons increase cost
- ✗Standard waste ratio
- ✗Bulky under sink
Our Verdict
Aquasana AQ-5300+ Max Flow
The best under-sink filter for higher flow and sediment-heavy water.
Special Deal Available — See OfferExpress Water RO5
The best under-sink RO with upgrade options for UV and alkaline water.
Limited Offer — Check Today's PriceOur Methodology
We test each under-sink filter for contaminant reduction, installation ease, and long-term cost. No manufacturer has editorial influence.
Related Comparisons
Best Under-Sink Water Filters 2026
Our ranked list of the best under sink water filters for 2026. Tested and reviewed independently.
OverviewCompare Under-Sink Water Filters
Compare under sink water filters side by side. Filter by specs, price, and features.
CompareCompare PureTap Products — Pick Two to Compare
Choose any two products to see a detailed side-by-side comparison. Compare specs, features, and value.
Head to HeadWaterdrop G3P800 Tankless RO vs Aquasana AQ-5300+ Max Flow — Which Should You Buy?
Side-by-side comparison of Waterdrop G3P800 Tankless RO and Aquasana AQ-5300+ Max Flow. We compare specs, performance, and value to help you decide.
Head to HeadWaterdrop G3P800 Tankless RO vs Express Water RO5 — Which Should You Buy?
Side-by-side comparison of Waterdrop G3P800 Tankless RO and Express Water RO5. We compare specs, performance, and value to help you decide.
Head to HeadAquasana AQ-5200 vs Aquasana AQ-5300+ Max Flow — Which Should You Buy?
Side-by-side comparison of Aquasana AQ-5200 and Aquasana AQ-5300+ Max Flow. We compare specs, performance, and value to help you decide.
Head to HeadAquasana AQ-5200 vs Express Water RO5 — Which Should You Buy?
Side-by-side comparison of Aquasana AQ-5200 and Express Water RO5. We compare specs, performance, and value to help you decide.