Wellis Air Lock in Jet Pump

Jet pump runs, but no water comes out of the jets after refill.

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Possible Causes

Pump not primed after draining; air trapped in the suction line; high point in plumbing trapping air; slice valves closed during start-up.

How to Fix / Troubleshooting

Safety first: Turn off power before loosening any unions.

  • 1. Verify water level:
    • Ensure the spa is filled above all jets and the skimmer.
  • 2. Open all valves:
    • Confirm slice valves on both sides of the pump are fully open.
  • 3. Bleed the pump:
    • Loosen the discharge union on the affected pump until air and water escape.
    • Retighten once a steady stream of water flows.
  • 4. Cycle pump:
    • Restore power and turn the pump on and off a few times to help purge air.
  • 5. If still no flow: Repeat bleeding at both suction and discharge unions. Persistent issues may indicate a suction blockage that requires professional service.
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Repair Difficulty

Easy 2/5

Required Part

Jet Pump 1
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