The short answer
The number is the valve body (5600, 2510, 9100, 7000); SXT is the digital timer and metering electronics.
The families
| Model | What it is |
|---|---|
| 5600 | Single-tank head, mechanical timer or meter |
| 5600SXT | 5600 body with SXT digital control |
| 2510SXT | Larger-flow single-tank head |
| 9100SXT | Twin-tank alternating head |
| 7000SXT | High-flow head |
Find yours
The model is on the valve body or under the cover; SXT units have a digital face with buttons.
Parts
Every part we cover that names a Fleck model is in the lookup, for example onerbl 560006-019 for Fleck 5600SE Power Supply, HTJYAUTO 60084-0122 for Fleck 5600 Brine Injector.
Products mentioned
Questions readers ask
What does SXT mean on a Fleck valve?
The digital control: a timer with metering and programming buttons.
Is a 9100SXT a twin-tank valve?
Yes, it alternates between two tanks.