I'm looking at a remodel here in the Tampa Bay area and I've never seen a skimmer like this before. Appears to have been cast with the pool shell. It's very square and uniform inside and there's a female adapter recessed in the back wall. Looks like someone drilled dimples in the throat tiles to install a weir. I'm wanting to cut the deck and box out and install a new plastic skimmer but don't want any surprises killing my budget.