BWT Flow Restriction / Pressure Drop

Noticeable drop in water pressure after installing or during operation of the BWT softener

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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 BWT inlet filter, Fouled resin bed with iron or sediment, Partially closed bypass or isolation valve, Undersized plumbing or softener for demand

How to Fix / Troubleshooting

Safety first: Close valves and relieve pressure before removing filters or opening the valve head.

  • Check inlet filter: Clean or replace the BWT inlet filter cartridge or mesh screen.
  • Verify valve positions: Ensure all service valves are fully open and the bypass is correctly set.
  • Backwash resin: Manually initiate a regeneration and allow full backwash to flush sediment from the resin bed.
  • Assess sizing: If pressure drop occurs only at high demand, the softener may be undersized. Consult BWT sizing guidelines.

Persistent severe pressure loss may indicate a collapsed resin bed or internal blockage requiring professional service.

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Repair Difficulty

Medium 3/5

Required Part

BWT inlet filter cartridge
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