
Pentair Fleck 5600SXT
Score: 88/100
DuraWater Fleck 9100 SXT
Score: 88/100Rankings

The Pentair 64k Fleck 5600SXT is a robust whole-home water softener designed for larger households with high water consumption. It features a high-capacity resin tank and a reliable digital metered valve that optimizes regeneration based on actual usage. While it requires significant space and a 24V power source, its durability and efficiency make it a top choice for demanding applications.

The Fleck 9100 SXT is a dual-tank, meter-initiated water softener designed to provide continuous soft water 24/7 by alternating between two resin tanks. It regenerates automatically based on actual water usage rather than a preset timer, utilizing 8% cross-linked resin for high efficiency. The system is engineered for homes and small commercial applications requiring reliable, uninterrupted soft water delivery.
| Attribute | ![]() | ![]() |
|---|---|---|
64,000 grainsbest | 48,000 grains | |
10 GPM | 12 GPMbest | |
2 gallonsbest | — | |
6 personsbest | 6 personsbest | |
| ↓ lower better | 48 inchesbest | 54 inches |
| ↓ lower better | 12 inches | 10 inchesbest |
| ↓ lower better | 48 inches | 10 inchesbest |
10 yearsbest | 10 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Power & Compliance(2) | ||
Power Source | 24V Transformer | Electric (24VAC) |
Certifications | None Listed | |
Performance & Capacity(4) | ||
Grain Capacity (grains) | 64000 grains | 48000 grains |
Service Flow Rate (GPM) | 10 GPM | 12 GPM |
Resin Volume (gallons) | 2 gallons | gallons |
Recommended Household Size (persons) | 6+ persons | 6 persons |
System & Control(3) | ||
Regeneration Control Type | Digital Metered | Meter-initiated |
System Type | Whole-Home | Dual Tank |
Salt Requirement | Standard Salt | Low |
Physical & Installation(5) | ||
Height (inches) | 48 inches | 54 inches |
Width (inches) | 12 inches | 10 inches |
Depth (inches) | 48 inches | 10 inches |
Installation Type | Whole-Home DIY | Professional |
Weight (lbs) | 200 lbs | lbs |

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

Professional assessments highlight the Fleck 5600SXT valve as the most popular water softener control valve on the planet, noting its reliability due to having only one internal moving part in the water stream and its double backwash engineering.
User feedback emphasizes the ease of DIY installation, supported by detailed instructions and video access, as well as the convenience of pre-programming options that simplify setup. Consumers value the reliability and durability of the proven 5600 valve design.




Professional sources emphasize the Fleck 9100 SXT's efficiency and reliability as its primary selling points. It is repeatedly described as the ultimate in twin tank soft water systems, noted for its ability to deliver continuous soft water while minimizing salt and water usage.
The search results do not include detailed consumer reviews or user feedback from platforms like Amazon, Google Reviews, or other retail sites. However, the product marketing emphasizes user satisfaction through its simple programmability, automatic tank switching, and the peace of mind of never running out of soft water.