Both are digital, demand-initiated Fleck valves — the difference is capacity and flow. The 5600SXT is the value standard for typical homes; the 5810SXT steps up flow and supports larger systems and bigger households.
| Fleck 5600SXT | Fleck 5810SXT | |
|---|---|---|
| Best for | 1–5 person homes, standard demand | Larger homes, higher peak flow |
| Service flow | ~7–9 gpm | ~13+ gpm |
| Port size | 3/4"–1" | 1" (higher throughput) |
| Max tank | Up to ~12" | Larger tanks supported |
| Display | SXT digital | SXT digital (newer platform) |
| Cost | Lowest | Higher (more capacity) |
Which to choose
Pick the 5600SXT for most households — it's the proven, lowest-cost workhorse. Choose the 5810SXT if you have a large home, multiple bathrooms running at once, or need higher flow without a pressure drop.
Shop Fleck valves → Fleck valve parts →
See also Fleck 2510 vs 5600 and the Best Fleck Water Softener guide.
Frequently asked questions
Is the 5810SXT better than the 5600SXT?
It's higher-capacity, not universally better. The 5810SXT suits large homes and higher flow; the 5600SXT is the better value for standard households.
What's the flow difference?
The 5600SXT handles roughly 7–9 gpm; the 5810SXT handles ~13+ gpm, so it holds pressure when several fixtures run at once.
Are 5600SXT and 5810SXT parts the same?
No — they're different valve bodies with different internals. Order parts specific to your model; we stock both.