Sundance Spas Suction Air Leak on Circulation Line

Persistent air bubbles from the filter area or suction fitting even when jets are off.

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Safety Warning

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.

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Possible Causes

Loose circulation pump union on suction side, Cracked suction fitting or plumbing, Low water level drawing air, Damaged O-ring on union

How to Fix / Troubleshooting

Safety first: Turn off power before tightening unions or working on plumbing.

  • 1. Check water level: Ensure water is high enough to cover all suction fittings and skimmer openings.
  • 2. Tighten suction unions: Hand-tighten the union on the suction side of the circulation pump. Inspect the O-ring and replace if flattened or cracked.
  • 3. Inspect suction fittings: Look for cracks around the filter housing or suction fittings inside the spa.
  • When to call a technician: If air continues to be drawn in, a hidden suction-side leak may require professional leak detection and repair.
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Repair Difficulty

Medium 3/5

Required Part

Circulation Pump Union O-Ring
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