Softener causes water hammer or banging pipes when it changes cycles.

Safety first: High water pressure can be dangerous. If you suspect very high pressure, contact a plumber.

Check water pressure:

• Use a pressure gauge on a hose bib to measure static pressure. Ideal is 40–60 psi; above 80 psi requires a pressure-reducing valve.

Mitigate hammer:

• Install water hammer arrestors near quick-closing valves (e.g., washing machine, dishwasher) and/or near the softener.
• Secure loose pipes with proper clamps and supports.
• If pressure is high, have a plumber install or adjust a pressure-reducing valve.

The softener valve itself usually does not require replacement; addressing system pressure and plumbing support typically resolves the issue.