Tier1 Excessive Drain Flow

Drain line discharges an unusually large amount of water or splashes violently during regeneration.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Incorrect or missing DLFC button, Oversized drain line, High system pressure, Modified or damaged valve internals

How to Fix / Troubleshooting

Safety first: Ensure the drain can handle the flow to prevent flooding. Wear eye protection around high-pressure discharges.

  • Verify DLFC presence: Remove the drain fitting and confirm a drain flow control button is installed. If missing, install the correct Tier1 DLFC for your softener size.
  • Check water pressure: Measure house water pressure. If above Tier1's recommended maximum, install a pressure-reducing valve.
  • Inspect valve: Ensure no internal modifications have been made that bypass the DLFC. Restore original configuration if altered.
  • Secure drain line: Anchor the drain hose to prevent whipping and ensure it is properly air-gapped at the drain.
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Repair Difficulty

Medium 3/5

Required Part

Tier1 drain flow control (DLFC) button
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