Removing air from a pool involves priming the machine with water to enable the pump to push out the air. When atmosphere exists from the consumption line and the pump chamber, the pump can’t draw water into the system to diffuse the atmosphere. Air may enter the line due to a low water level that admits air through the skimmers, by leaves or other debris clogging the skimmers, or even an air leak at the intake vent of the pool pump or at pump seals.
Turn off power to the pool and pool. Also switch off the pool cleaning pump in case one is installed.
Expand the air relief valve located on top of the filter canister counterclockwise to open the valve.
Close to the skimmer valves and leave open the primary drain valve.
Open the pool pump strainer box cover, typically secured by two knurled knobs. Check the presence of water from the pump basket. If no water is present, then fill the strainer with water in a garden hose.
Inspect the pump cover gasket for cracks. Lubricate the gasket with oil jelly and reinstall the cover. Hand tighten the cover knobs.
Turn the filter multiport valve to the “Filter” setting.
Restore power to the pump. Gradually open the skimmer valve. You must see bubbles discharging from the returns as air is forced from the line to the pool water.
Notice the air relief valve on top of the filter canister. You must hear the sound of air travel since the machine fills with water. When water begins to spurt from the relief valve, then turn the valve clockwise to close it.
Turn on the pool and also the pool cleaning pump.