Judo Water Hammer / Rapid Valve Switching

Judo softener makes loud banging or water hammer noises during regeneration

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Possible Causes

High mains pressure without pressure reducer, Rapid closing Judo valve ports, Loose piping near softener, Missing or failed water hammer arrestor

How to Fix / Troubleshooting

Safety first: Do not touch moving valve parts during regeneration. Avoid standing directly over rigid copper lines when testing.

  • Check pressure: Measure mains pressure. If it exceeds Judo's recommended maximum, install or service a Judo pressure reducing valve upstream.
  • Secure piping: Ensure all pipes near the softener are properly clipped and supported to reduce movement.
  • Install hammer arrestor: Fit a water hammer arrestor on the line feeding the softener if hammer persists.
  • Adjust regeneration time: Schedule regeneration for night hours to minimize disturbance, but still address the underlying pressure issue.
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Repair Difficulty

Easy 2/5

Required Part

Judo pressure reducing valve
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