Spa cabinet or shell vibrates excessively when jets are on high speed.

Safety first: Turn off power at the GFCI breaker before adjusting pump mounts or plumbing.

• Step 1 – Check water level: Ensure the spa is filled to the proper level to minimize air ingestion.
• Step 2 – Bleed air: Loosen pump unions slightly to release trapped air, then retighten.
• Step 3 – Inspect mounts: Confirm that pumps are firmly secured to their bases and that rubber isolation pads are present and not deteriorated.
• Step 4 – Check plumbing alignment: Look for rigid PVC lines pulling the pump out of alignment. Adjust supports or add flexible couplings if necessary.
• Step 5 – Replace pump if needed: If the pump impeller or motor is out of balance, replacing the pump assembly may be required to eliminate vibration.