Pump runs but causes excessive air bubbles in the pool returns.

Safety first: Turn off the pump before opening the lid or adjusting unions.

Steps to check:

• Check lid seal: Clean and lubricate the DAB pump lid O-ring, then tighten the lid firmly.
• Tighten unions: Hand-tighten suction side unions and check for drips when the pump is off.
• Inspect skimmer and hoses: Ensure the skimmer weir is not stuck and that vacuum hoses are fully submerged and free of pinholes.
• Observe pump basket: If air persists under the lid, systematically check each suction source for leaks.