Hanscraft Hydraulic Vibration / Cavitation or Loose Mounts

Spa makes loud banging, knocking, or vibration noises when pumps run.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Air in pump, Loose pump mounting bolts, Rigid plumbing stressing pump, Cavitation due to restricted suction

Safety: Turn off power before tightening any hardware.

Bleed air: Release air from pump unions as described previously to eliminate cavitation.
Check pump mounts: Inspect the Hanscraft pump base and tighten any loose mounting bolts or screws.
Support plumbing: Add pipe supports or foam blocks under long PVC runs to reduce stress and vibration.

Persistent loud noises may indicate internal pump damage; consider pump replacement.

Medium 3/5

Hanscraft Pump Mounting Kit

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