Update. I have tried everything to get the black mold out. Nothing is working. I have found a new tank and most likely just going to make the investment (worried that the family may get sick if I don’t get the old tank completely clean. I have to give the sizes and location for the holes. Can anyone help with the correct size of the connections.
Bottom
gate valve drain 1 13/16 inside and 2 3/26 outside female threaded?
90 degree bibbed 3/4 inside and 1 3/16 outside female threaded?
Top
smooth push on connection from water filler 5/16 inside 3/8 outside
straight bibbed 3/4 inside and 1 3/16 outside female thread (vent for tank)
Do there sizes sound right?
What are the correct names for the connections.