Can anyone help identify this drain/valve?

[Greddy111]

Could anyone help me identify what these holes are? They are at the deep end of the pool.
I assume one goes to the skimmer (the one in top in photo thats plugged)
And i assume the second one could be a hydrostatic valve? But it doesnt look like any when i search for hydrostatic valves...

 

[Texas Splash]

Welcome to TFP! Maybe @1poolman1 has seen this set-up before?

 

[proavia]

Are they on the pool floor at the deepest part of the pool or on the pool side wall?

 

[Greddy111]

Welcome to TFP! Maybe @1poolman1 has seen this set-up before?

Thanks! Been lurking for a bit now.

Are they on the pool floor at the deepest part of the pool or on the pool side wall?

Deepest part of the pool on the floor (where main "drain" & hydrostatic valve typically are)

 

[1poolman1]

We don't see a lot of fiberglass pools in Northern CA. As they are more susceptible to ground-water problems, that likely is a combo main-drain/hydrostatic valve, though I've never seen one like that. If you can find the manufacturer of the pool they should be able to tell you.

 

[Greddy111]

We don't see a lot of fiberglass pools in Northern CA. As they are more susceptible to ground-water problems, that likely is a combo main-drain/hydrostatic valve, though I've never seen one like that. If you can find the manufacturer of the pool they should be able to tell you.

Im actually currently awaiting any info from the manufacturer. Appears it is discontinued so may come back with minimal/no info.
Does that typically come with the fiberglass?
I just assumed drains/skimmers/plumbing etc was up to the installer.

 

[Greddy111]

I also am having trouble identifying what this hole is for... (Could that pipe ve connected possibly?)

At first I thought it was a sump tube but heres what is inside