Thank you everyone for the great replies. I did just replace the Pumps lid rubber seal but did not put any lube on it so I will try that. Unfortunately, there is not much above ground piping between the pump and the skimmers. (Although since I see air even when I switch from skimmers to Main Drain - It is probably somewhere from that y switch to the pump right?) That section is all expose and I will try the towel trick to see if I can make the bubbles disappear from the lid of the pump. I'll keep everyone posted.

Thanks again for the suggestions.

CARLO.