Waterway pool pump runs but the clear lid shows a large pocket of air and return jets blow bubbles.

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

• Service lid o‑ring: Clean, lubricate, and if necessary replace the Waterway lid o‑ring as described earlier.
• Check unions and fittings: Tighten suction‑side unions and inspect for cracks. Wrap suspect threaded joints with fresh PTFE tape and reseal.
• Inspect skimmer and hoses: Ensure the skimmer weir is not stuck and that any vacuum hose connections are tight and fully submerged.
• Test with dye: With the pump running, use a small amount of food coloring near suspected leak points on the suction side. If the dye is drawn in, you have found an air leak that must be repaired.