Pump runs but air bubbles are visible in the pump lid and at pool returns

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

• Check water level: Raise pool water level to prevent vortexing at the skimmer that can draw air into the suction line.
• Inspect lid seal: Remove and inspect the Calpeda pump lid O-ring. Clean, lubricate with silicone grease, and replace if cracked or flattened.
• Tighten suction unions: Hand-tighten unions on the suction side, then add a small additional turn with a strap wrench. Do not overtighten plastic fittings.
• Check for pipe leaks: Look for damp soil, water stains, or hissing sounds along the suction line. Repair or replace damaged sections of pipe or fittings.