Scalemaster Water Hammer / Rapid Valve Operation Noise

Water softener makes loud banging or hammering noises when regenerating

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Possible Causes

High mains pressure with no shock arrestor, Fast-closing Scalemaster control valve stages, Loose pipe clips on supply lines, Undersized or long flexible hoses

How to Fix / Troubleshooting

Safety first: No immediate hazard, but repeated hammer can damage plumbing.

Step-by-step checks:

  • 1. Check pipe support: Ensure pipes feeding the softener are securely clipped to walls or joists.
  • 2. Reduce pressure: If pressure is high, have a plumber fit or adjust a pressure reducing valve.
  • 3. Install water hammer arrestor: Ask a plumber to fit a hammer arrestor near the softener inlet if hammer persists.

Internal valve timing is factory set; do not attempt to modify regeneration speeds without Scalemaster guidance.

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Repair Difficulty

Easy 2/5

Required Part

Upstream Plumbing / Pressure Reducing Valve
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