
AFW Filters Fleck 5600SXT
Score: 86/100
NU Aqua 4 Stage
Score: 65/100Rankings

The AFW Filters Built Fleck 5600SXT is a comprehensive whole-house water softening system that combines 48,000-grain softening capacity with an upflow carbon filter for superior water quality. It features NSF-approved components and a digital metered valve for efficient operation. It is best suited for households seeking both soft water and filtration for chlorine and organic contaminants.

The NU Aqua 4-Stage Salt-Free Water Softener is a whole-home water treatment system that conditions water without using salt, electricity, or producing wastewater. It utilizes a four-stage filtration process to remove contaminants while preventing scale buildup. While it offers low maintenance and high flow rates, it lacks independent expert reviews and does not remove hardness ions entirely.
| Attribute | ![]() | ![]() |
|---|---|---|
48,000 grainsbest | — | |
12 GPM | 15 GPMbest | |
1.5 gallonsbest | — | |
6 personsbest | — | |
| ↓ lower better | 62 inches | 31 inchesbest |
| ↓ lower better | 10 inches | 7 inchesbest |
| ↓ lower better | 10 inchesbest | 31 inches |
10 yearsbest | 1 years |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Build & Durability(2) | ||
Tank Material | Standard | Steel |
Warranty Length (years) | 10 years | 1 years |
Power & Compliance(2) | ||
Power Source | AC | None |
Certifications | NSF | None Listed |
Performance & Capacity(4) | ||
Grain Capacity (grains) | 48000 grains | grains |
Service Flow Rate (GPM) | 12 GPM | 15 GPM |
Resin Volume (gallons) | 1.5 gallons | gallons |
Recommended Household Size (persons) | 6 persons | persons |
System & Control(4) | ||
Regeneration Control Type | Meter Demand | None |
System Type | Whole-house with Carbon Filter | Salt-Free |
Salt Requirement | 250 lbs | None |
Display Type | LCD | None |
Physical & Installation(5) | ||
Height (inches) | 62 inches | 31 inches |
Width (inches) | 10 inches | 7 inches |
Depth (inches) | 10 inches | 31 inches |
Installation Type | DIY | Whole-Home DIY |
Weight (lbs) | lbs | 53 lbs |

Products in the top-left offer the best value (high score, low price).

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The search results do not include professional expert reviews, user feedback, or documented complaints about this system. Available information is limited to product descriptions from the manufacturer and retail listings, which do not provide critical analysis or independent testing data.
The search results do not include professional expert reviews, user feedback, or documented complaints about this system. Available information is limited to product descriptions from the manufacturer and retail listings, which do not provide critical analysis or independent testing data.