Spa vibrates excessively or makes banging noises when jets are on.

Safety first: Turn OFF power before tightening any hardware or opening unions.

• Bleed air:
  • Loosen pump unions slightly to release trapped air, then retighten.
• Check pump mounts:
  • Inspect pump mounting bolts and rubber feet; tighten loose bolts and replace damaged mounts.
• Open valves and clear suctions:
  • Ensure all slice valves are fully open.
  • Remove debris from skimmers and suction fittings.
• Inspect jets:
  • Remove and clean individual jets that may be partially blocked, then reinstall.