Amfa4000 Flow Restriction Through Softener

Amfa4000 causes noticeable drop in water pressure throughout the house during normal use

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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

Partially blocked inlet/outlet manifold, Compacted or fouled resin bed, Undersized Amfa4000 model for household demand, Clogged pre-filter cartridge

How to Fix / Troubleshooting

Safety first: Turn off water and relieve pressure before disconnecting any plumbing.

  • 1. Compare pressure in bypass: Place the Amfa4000 in bypass and check if household pressure improves. If it does, the restriction is within the softener.
  • 2. Inspect pre-filter: Replace or clean any sediment filter installed before the Amfa4000.
  • 3. Clean inlet/outlet screens: Remove and rinse any mesh screens in the Amfa4000 manifold.
  • 4. Regenerate and re-test: Run a full regeneration to loosen the resin bed and then check flow again.

If pressure drop remains significant, the resin may be fouled or the unit undersized; consider resin replacement or upgrading to a higher-capacity Amfa4000 model.

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Repair Difficulty

Medium 3/5

Required Part

Amfa4000 Inlet/Outlet Manifold Assembly
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