I was looking for some information about commercial pool systems. Our community pool is haveing problems keeping a prime. I think we have come to the conclusion that there is something in the 8 inch return line that may be prohibiting the proper flow. I was going to have one of my plumber out this week to run a camera down there to check things out, so I was just looking for information prior to that. The system has a "well" of to the side of the pool with a man hole cover over it were something could have easily been thrown down there.

I was wondering if anyone had any experience with a system like this?