Aquasana AQ-5300+.55 Filtration System
- Filtration System
- 0.5 gallons
- Activated Carbon
- Under-Sink
- More reviewed than 94%
A metal-bodied under-sink activated carbon system rated at 0.5 GPM, reasonable for an install where housing durability matters, though its rating trails some competitors here.
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How it ranks among the 65 filtration systems we track
3.9★ across 3,200 Amazon ratings, Bayesian-smoothed toward the category average.
3,200 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 65 filtration systems we track - how the scorecard works · full filtration systems data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Aquasana AQ-5300+.55 is an under-sink activated carbon filtration system rated at 0.5 gallons per minute, built with a metal housing. It measures about 12 x 4.25 x 12.88 inches and weighs 7 pounds.
Aquasana rates this system by flow rate, gallons per minute, rather than the total gallon capacity some competitors list, which makes it easier to judge how it will handle simultaneous use at the tap. The metal housing adds weight and durability compared to plastic under-sink units. Its 3.9 rating sits lower than some other systems in this category, which is worth weighing alongside the other numbers here.
- Activated carbon filtration
- 0.5 GPM rated flow
- Metal housing
- Under-sink install
Who it's for
Fits a household installing a permanent under-sink filter and prioritizing a metal build over a lighter plastic housing. Less suited to anyone who wants the highest-rated option in this comparison set.
Strengths and trade-offs
Drawn from this product's published specifications.
- Metal housing rather than plastic
- Rated flow of 0.5 GPM stated plainly
- Rating of 3.9 is lower than some comparable systems
- Heavier at 7 lb than plastic alternatives
Performance notes
Activated carbon filtration handles chlorine taste and odor and some organic compounds. The 0.5 gallons per minute rating describes flow under filtration, which governs how quickly filtered water reaches the tap rather than total filter lifespan.
Specifications
| Brand | Aquasana |
|---|---|
| Model | AQ-5300+.55 |
| Dimensions & fit | |
| Weight | 7 pounds |
| Dimensions | 12 × 4.2 × 12.9 inches |
| Capacity & performance | |
| Capacity | 0.5 gallons |
| Construction & materials | |
| Material | Metal |
| Compatibility & installation | |
| Install Type | Under-Sink |
| Other details | |
| Purification | Activated Carbon |
Other Aquasana filtration systems
How it compares
This product against the closest alternatives we track in filtration systems.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Aquasana AQ-5300+.55 Filtration SystemThis product | 3.9 / 5 | 3,200 | 3.6 / 5 |
| Waterdrop WD-TSU Filtration SystemWaterdrop | 4.5 / 5 | 3,347 | 4.4 / 5 |
| Aqua Crest AQ-5KDC Filtration SystemAqua Crest | 4.4 / 5 | 1,300 | 4.3 / 5 |
| iSpring RO500AK-BN Filtration SystemiSpring | 4.7 / 5 | 562 | 4.2 / 5 |
| Apec Water WFS-1000 Filtration SystemApec Water | 4.3 / 5 | 1,500 | 4.2 / 5 |
Similar filtration systems from other brands
Questions about the Aquasana AQ-5300+.55
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What is the flow rate of the Aquasana AQ-5300+.55?
It is rated at 0.5 gallons per minute.
Is the AQ-5300+.55 housing metal or plastic?
Metal.
How much does the AQ-5300+.55 weigh?
7 pounds.