Pentair Sta-Rite Suction Side Air Leak

Pump runs but there are lots of bubbles at the pool returns

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Possible Causes

Leaking pump lid o‑ring, Loose suction unions, Cracked suction fittings, Low water level drawing air at skimmer

How to Fix / Troubleshooting

Safety: Turn off power before tightening unions or opening the pump.

  • Check water level: Ensure the pool water level is high enough to cover the skimmer opening properly.
  • Inspect pump lid: Clean and lubricate the Sta‑Rite pump lid o‑ring. Tighten the lid evenly.
  • Tighten suction fittings: Hand‑tighten unions and check for cracks in fittings. Replace any cracked parts.
  • Test with water: With the pump running, carefully pour water over suspected leak points (lid, unions). If bubbles decrease temporarily, you have found an air leak to repair.
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Repair Difficulty

Easy 2/5

Required Part

Pump Lid O‑Ring
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