flipper

Wow ! Quick responses! Both are appreciated more than you know ! I'll try both post's suggestions and get back to you. Wish me luck !

Hello All, Where is the most obvious place that air can get into the flow system without having a water leak also? I have lots of air in my flow. So much in fact that after a couple of hours of filtering, I start to lose prime. When I hook my vacum up to the skimmer, I lose prime within 10 minutes. I have no water loss. I've checked it numerous times. I recently replaced a .5 hp motor and basket assembly with a new 2 hp motor and assembly and the problem started then. My pool is 36x18 with Hayward pump and filter system. Any suggestions would be appreciated. Thanks in advance.