Best way to remove nipples on water pump?

ToolmanMike Is teasing me by saying “I am afraid, so very afraid”, because I’m having some trouble with removing the crankcase bolt in another post. First time doing it. Trying to learn everything myself. The engine is all tore down just block with internals. The engine is still in my car all broken down. It’s up on jack stands in my little one car garage. I was asking the gang how to get the crankcase bolt out without an impact gun. I just have hand tools. They did help me understand how to do it.
Carl