Hey y'all we have drained our 20k in ground concrete pool to do some repairs and there are several places where I see this cap. I'm assuming it's a Hydrostatic Valve and if so, I would like to remove the valve so the pool doesn't float while we do patching and cleaning. Can someone confirm and if so is there a tool that I can get to remove it? Or is it simply turning clockwise? Thanks in Advance!