I've noticed that the four return inlets in the pool are all 1" pvc pipes. Two of them have what looks like the remnants of the eyeball fitting stub in them, but the threaded portion is totally missing. Essentially, it looks like someone tried to remove the fittings by pulling it straight off, and the force broke off the outer flange. So now I have two questions:
When I'm replacing the eyeball fitting, do I need to glue it into the inlet? If so, what adhesive do I use. I've tried shoving one in, but it seems like it isn't fitting snugly against the concrete, and I worry that the water pressure will push it out.
My other question is how do I remove the left-over fitting? Do I just gently use a hacksaw to cut through the fitting stub but not the inlet?