Pentair Overfill / Brine Refill Control Failure

Brine tank overflows with water or is excessively full after regeneration.

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Possible Causes

Stuck brine refill valve, Leaking brine float, Incorrect refill time programmed, Cracked brine line allowing siphon

How to Fix / Troubleshooting

Safety: Unplug power and avoid contact with salty water on the floor to prevent slipping. Shut off water if overflow is severe.

  • Check float shutoff: Inspect the brine float assembly to ensure it rises and shuts off brine flow. Replace the Pentair brine float assembly if it does not seal.
  • Inspect refill valve: Remove and clean the brine refill valve and flow control in the Pentair valve. Replace if stuck open.
  • Programming: Verify the brine refill time or salt dose is correctly set. Excessive refill time will overfill the tank.
  • Brine line routing: Ensure the brine line does not create a siphon effect from the valve to the tank. Route per Pentair installation instructions.
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Repair Difficulty

Easy 2/5

Required Part

Pentair brine float assembly
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