
Pentair Fleck 5600SXT
Score: 88/100
Discount Water Softeners Fleck 5600SXT
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 5600sxt by Discount Water Softeners is a highly efficient, digital metered water softener that saves up to 40% on salt and water usage. It features a compact design with a 40,000-grain capacity and a 12 GPM flow rate, making it ideal for moderate to hard water conditions. It is best suited for environmentally conscious homeowners seeking low maintenance and long-term value.
| Attribute | ![]() | ![]() |
|---|---|---|
64,000 grainsbest | 40,000 grains | |
10 GPM | 12 GPMbest | |
2 gallonsbest | 1 gallons | |
6 personsbest | 4 persons | |
| ↓ lower better | 48 inches | 44 inchesbest |
| ↓ 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 | ![]() | ![]() |
|---|---|---|
Build & Durability(1) | ||
Tank Material | Fiberglass | Standard |
Power & Compliance(1) | ||
Power Source | 24V Transformer | AC (120V) |
Performance & Capacity(4) | ||
Grain Capacity (grains) | 64000 grains | 40000 grains |
Service Flow Rate (GPM) | 10 GPM | 12 GPM |
Resin Volume (gallons) | 2 gallons | 1.0 gallons |
Recommended Household Size (persons) | 6+ persons | 4 persons |
System & Control(4) | ||
Regeneration Control Type | Digital Metered | Meter Demand |
System Type | Whole-Home | Whole-house |
Salt Requirement | Standard Salt | 250 lbs |
Display Type | Digital | LCD |
Physical & Installation(5) | ||
Height (inches) | 48 inches | 44 inches |
Width (inches) | 12 inches | 10 inches |
Depth (inches) | 48 inches | 10 inches |
Installation Type | Whole-Home DIY | DIY |
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.



The Fleck 5600 SXT is described as Fleck's most popular controller and one of the best whole house water softeners, praised for its advanced features combined with a simple design.
Customers appreciate the automatic metering system that adjusts regeneration frequency based on actual water usage patterns, noting scale reduction and extended appliance lifespan.