AO Smith Flow Restriction Through Softener

Softener causes noticeable drop in water pressure throughout the home.

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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

Clogged inlet screen, Fouled resin bed, Partially closed bypass, Undersized softener for flow demand

How to Fix / Troubleshooting

Safety first: Turn off power and close the inlet valve before disassembly.

Quick isolation test:

  • Place the softener in bypass. If pressure improves immediately, the restriction is within the softener.

Inspect inlet screen and valve:

  • Remove the inlet fitting and check for a screen or flow restrictor clogged with sediment.
  • Clean or replace the screen as needed.

Resin bed issues:

  • Severe iron or sediment can plug the resin bed, increasing pressure drop.
  • A professional can perform a resin bed inspection; in many cases, replacing the resin media is the long-term fix.

Ensure the bypass is fully in service position and that the softener size matches your home’s peak flow requirements.

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Repair Difficulty

Hard 4/5

Required Part

Inlet Screen / Resin Media
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