Thanks for the info.

I relayed it back to my son, who then clearly remembered seeing the front hole on the skimmer being capped at the bottom, and the other hole being piped back to the pump.

Unfortunately, the hole leading to the pump is the one with that danged plug in it, and after trips to the Depot, Lowe's and a hardware store, no one has anything I can use to get that plug out. I was hoping to avoid calling a start-up person or the plumber back out, because I know how to operate everything else. Oh, well.

Thanks again!

Valerie