Softener makes loud banging or knocking noises during regeneration.

Safety first: Sudden pressure surges can damage plumbing. Consider installing a pressure gauge to monitor system pressure.

• Check water pressure: Measure house pressure. If above manufacturer limits (often ~80 psi), install or service a pressure-reducing valve.
• Secure plumbing: Ensure pipes near the softener are properly strapped and supported to reduce movement.
• Inspect valve seals: Worn seals can cause chattering as the valve shifts. Replace the rotor and seal kit if noises are accompanied by performance issues.
• Install water hammer arrestors: If banging persists, add hammer arrestors near quick-closing valves and the softener.
• Adjust regeneration time: Schedule regeneration during low-demand periods to minimize audible disturbance.