The short answer
A rebuild replaces the seals, spacers and piston that wear and let water leak to drain or bypass the resin; it fixes most 5600 problems without a new head.
Signs it needs a rebuild
- Water running to the drain constantly.
- Hard water between regenerations with salt and settings fine.
- The valve stalls in a cycle.
Order of work
- Bypass, unplug and relieve pressure.
- Remove the powerhead and the piston assembly.
- Pull the old seals and spacers in order; lubricate new ones as the kit directs.
- Fit the new piston, reassemble, restore water slowly.
Kits we cover
onerbl 560006-019 for Fleck 5600SE Power Supply, HTJYAUTO 60084-0122 for Fleck 5600 Brine Injector, AFWFilters FP-5600RBKS for Fleck 5600 Valve Rebuild Kit. More in the valve parts lookup.
Products mentioned
Questions readers ask
How long does a Fleck 5600 rebuild take?
Usually under an hour with the right kit and the service manual.
Do 5600 and 5600SXT use the same rebuild kit?
They share the body, seals, spacers and piston; boards and meters differ.